./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark38_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark38_conjunctive.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P --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 32bit --witnessprinter.graph.data.programhash 366d45071e2a444aa552f231e24508af3eb704e415c6b738128a0398e54b53a7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:16:19,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:16:19,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:16:19,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:16:19,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:16:19,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:16:19,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:16:19,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:16:19,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:16:19,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:16:19,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:16:19,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:16:19,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:16:19,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:16:19,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:16:19,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:16:19,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:16:19,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:16:19,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:16:19,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:16:19,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:16:19,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:16:19,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:16:19,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:16:19,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:16:19,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:16:19,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:16:19,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:16:19,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:16:19,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:16:19,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:16:19,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:16:19,714 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:16:19,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:16:19,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:16:19,717 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:16:19,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:16:19,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:16:19,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:16:19,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:16:19,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:16:19,722 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-32bit-Taipan_Default.epf [2021-11-20 23:16:19,771 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:16:19,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:16:19,772 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:16:19,773 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:16:19,774 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:16:19,774 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:16:19,774 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:16:19,774 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:16:19,775 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:16:19,775 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:16:19,776 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:16:19,776 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:16:19,776 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:16:19,777 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:16:19,777 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:16:19,777 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:16:19,777 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:16:19,778 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:16:19,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:16:19,779 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:16:19,779 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 23:16:19,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:16:19,779 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:16:19,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:16:19,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:16:19,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:16:19,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:16:19,782 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-20 23:16:19,782 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:16:19,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:16:19,783 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:16:19,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:16:19,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:16:19,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:16:19,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:16:19,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:16:19,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:16:19,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:16:19,785 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:16:19,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:16:19,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:16:19,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:16:19,786 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:16:19,786 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 366d45071e2a444aa552f231e24508af3eb704e415c6b738128a0398e54b53a7 [2021-11-20 23:16:20,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:16:20,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:16:20,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:16:20,104 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:16:20,105 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:16:20,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/loop-zilu/benchmark38_conjunctive.i [2021-11-20 23:16:20,183 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/data/d849e93bd/1bd3066ae13547598d625ca49baeda44/FLAG86e2b2cf9 [2021-11-20 23:16:20,628 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:16:20,629 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/sv-benchmarks/c/loop-zilu/benchmark38_conjunctive.i [2021-11-20 23:16:20,641 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/data/d849e93bd/1bd3066ae13547598d625ca49baeda44/FLAG86e2b2cf9 [2021-11-20 23:16:21,029 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/data/d849e93bd/1bd3066ae13547598d625ca49baeda44 [2021-11-20 23:16:21,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:16:21,036 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:16:21,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:16:21,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:16:21,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:16:21,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:16:21" (1/1) ... [2021-11-20 23:16:21,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5995af23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:21, skipping insertion in model container [2021-11-20 23:16:21,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:16:21" (1/1) ... [2021-11-20 23:16:21,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:16:21,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:16:21,332 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/sv-benchmarks/c/loop-zilu/benchmark38_conjunctive.i[873,886] [2021-11-20 23:16:21,344 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:16:21,353 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:16:21,367 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/sv-benchmarks/c/loop-zilu/benchmark38_conjunctive.i[873,886] [2021-11-20 23:16:21,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:16:21,389 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:16:21,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:21 WrapperNode [2021-11-20 23:16:21,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:16:21,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:16:21,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:16:21,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:16:21,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:21" (1/1) ... [2021-11-20 23:16:21,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:21" (1/1) ... [2021-11-20 23:16:21,424 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 40 [2021-11-20 23:16:21,425 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:16:21,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:16:21,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:16:21,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:16:21,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:21" (1/1) ... [2021-11-20 23:16:21,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:21" (1/1) ... [2021-11-20 23:16:21,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:21" (1/1) ... [2021-11-20 23:16:21,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:21" (1/1) ... [2021-11-20 23:16:21,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:21" (1/1) ... [2021-11-20 23:16:21,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:21" (1/1) ... [2021-11-20 23:16:21,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:21" (1/1) ... [2021-11-20 23:16:21,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:16:21,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:16:21,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:16:21,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:16:21,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:21" (1/1) ... [2021-11-20 23:16:21,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:16:21,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:21,486 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:16:21,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:16:21,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:16:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:16:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:16:21,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:16:21,582 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:16:21,584 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:16:21,740 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:16:21,773 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:16:21,774 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:16:21,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:16:21 BoogieIcfgContainer [2021-11-20 23:16:21,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:16:21,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:16:21,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:16:21,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:16:21,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:16:21" (1/3) ... [2021-11-20 23:16:21,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fafaeea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:16:21, skipping insertion in model container [2021-11-20 23:16:21,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:21" (2/3) ... [2021-11-20 23:16:21,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fafaeea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:16:21, skipping insertion in model container [2021-11-20 23:16:21,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:16:21" (3/3) ... [2021-11-20 23:16:21,787 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark38_conjunctive.i [2021-11-20 23:16:21,797 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:16:21,797 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-20 23:16:21,861 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:16:21,871 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:16:21,872 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-20 23:16:21,889 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 10 states have (on average 1.8) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-20 23:16:21,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:21,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-20 23:16:21,897 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:21,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:21,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2181983, now seen corresponding path program 1 times [2021-11-20 23:16:21,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:21,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998229093] [2021-11-20 23:16:21,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:21,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:22,113 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:22,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998229093] [2021-11-20 23:16:22,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998229093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:22,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:22,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:16:22,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436755132] [2021-11-20 23:16:22,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:22,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:16:22,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:22,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:16:22,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:16:22,203 INFO L87 Difference]: Start difference. First operand has 17 states, 10 states have (on average 1.8) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:22,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:22,275 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-11-20 23:16:22,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:16:22,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-20 23:16:22,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:22,287 INFO L225 Difference]: With dead ends: 27 [2021-11-20 23:16:22,288 INFO L226 Difference]: Without dead ends: 22 [2021-11-20 23:16:22,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:16:22,295 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:22,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:16:22,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-20 23:16:22,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2021-11-20 23:16:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-20 23:16:22,351 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 4 [2021-11-20 23:16:22,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:22,352 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-20 23:16:22,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:22,352 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-20 23:16:22,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-20 23:16:22,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:22,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-20 23:16:22,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:16:22,366 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:22,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:22,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2182862, now seen corresponding path program 1 times [2021-11-20 23:16:22,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:22,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284410837] [2021-11-20 23:16:22,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:22,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:22,398 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:22,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284410837] [2021-11-20 23:16:22,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284410837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:22,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:22,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:16:22,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124778469] [2021-11-20 23:16:22,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:22,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:16:22,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:22,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:16:22,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:16:22,403 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:22,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:22,425 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-11-20 23:16:22,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:16:22,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-20 23:16:22,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:22,427 INFO L225 Difference]: With dead ends: 26 [2021-11-20 23:16:22,427 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 23:16:22,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:16:22,430 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:22,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:16:22,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 23:16:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2021-11-20 23:16:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-20 23:16:22,436 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 4 [2021-11-20 23:16:22,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:22,437 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-20 23:16:22,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:22,438 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-20 23:16:22,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:16:22,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:22,438 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:16:22,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:16:22,439 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:22,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:22,440 INFO L85 PathProgramCache]: Analyzing trace with hash 67641523, now seen corresponding path program 1 times [2021-11-20 23:16:22,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:22,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632353535] [2021-11-20 23:16:22,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:22,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:22,485 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:22,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632353535] [2021-11-20 23:16:22,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632353535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:22,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:22,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-20 23:16:22,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532369741] [2021-11-20 23:16:22,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:22,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:16:22,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:22,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:16:22,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:16:22,491 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:22,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:22,520 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-11-20 23:16:22,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:16:22,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 23:16:22,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:22,522 INFO L225 Difference]: With dead ends: 18 [2021-11-20 23:16:22,522 INFO L226 Difference]: Without dead ends: 17 [2021-11-20 23:16:22,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:16:22,528 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:22,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:16:22,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-20 23:16:22,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-20 23:16:22,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:22,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-20 23:16:22,539 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 5 [2021-11-20 23:16:22,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:22,539 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-20 23:16:22,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:22,540 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-20 23:16:22,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:16:22,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:22,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:16:22,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:16:22,542 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:22,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:22,542 INFO L85 PathProgramCache]: Analyzing trace with hash 67668783, now seen corresponding path program 1 times [2021-11-20 23:16:22,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:22,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824611247] [2021-11-20 23:16:22,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:22,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:22,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:22,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824611247] [2021-11-20 23:16:22,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824611247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:22,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:22,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:16:22,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636121539] [2021-11-20 23:16:22,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:22,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:16:22,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:22,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:16:22,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:16:22,578 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:22,596 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-11-20 23:16:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:16:22,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 23:16:22,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:22,598 INFO L225 Difference]: With dead ends: 24 [2021-11-20 23:16:22,598 INFO L226 Difference]: Without dead ends: 21 [2021-11-20 23:16:22,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:16:22,600 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:22,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 16 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:16:22,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-20 23:16:22,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2021-11-20 23:16:22,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:22,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-11-20 23:16:22,606 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 5 [2021-11-20 23:16:22,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:22,606 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-11-20 23:16:22,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:22,607 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-11-20 23:16:22,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:16:22,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:22,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:16:22,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:16:22,609 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:22,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:22,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2096887265, now seen corresponding path program 1 times [2021-11-20 23:16:22,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:22,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899950983] [2021-11-20 23:16:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:22,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:22,661 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:22,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899950983] [2021-11-20 23:16:22,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899950983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:22,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:22,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:16:22,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963885976] [2021-11-20 23:16:22,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:22,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:16:22,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:22,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:16:22,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:16:22,665 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:22,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:22,720 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-11-20 23:16:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:16:22,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 23:16:22,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:22,741 INFO L225 Difference]: With dead ends: 21 [2021-11-20 23:16:22,741 INFO L226 Difference]: Without dead ends: 20 [2021-11-20 23:16:22,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:16:22,743 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:22,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 21 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:16:22,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-20 23:16:22,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-20 23:16:22,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:22,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-11-20 23:16:22,749 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 6 [2021-11-20 23:16:22,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:22,749 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-11-20 23:16:22,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:22,750 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-11-20 23:16:22,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 23:16:22,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:22,751 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:22,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:16:22,751 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:22,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:22,752 INFO L85 PathProgramCache]: Analyzing trace with hash 578995829, now seen corresponding path program 1 times [2021-11-20 23:16:22,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:22,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975771083] [2021-11-20 23:16:22,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:22,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:22,803 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:22,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975771083] [2021-11-20 23:16:22,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975771083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:22,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:22,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:16:22,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529505711] [2021-11-20 23:16:22,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:22,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:16:22,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:22,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:16:22,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:16:22,807 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:22,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:22,829 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-11-20 23:16:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:16:22,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 23:16:22,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:22,830 INFO L225 Difference]: With dead ends: 18 [2021-11-20 23:16:22,831 INFO L226 Difference]: Without dead ends: 15 [2021-11-20 23:16:22,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:16:22,832 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:22,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 8 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:16:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-20 23:16:22,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-20 23:16:22,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-20 23:16:22,837 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2021-11-20 23:16:22,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:22,837 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-20 23:16:22,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:22,838 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-20 23:16:22,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 23:16:22,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:22,838 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:22,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:16:22,839 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:22,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:22,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1930755337, now seen corresponding path program 1 times [2021-11-20 23:16:22,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:22,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430779752] [2021-11-20 23:16:22,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:22,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:22,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:22,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430779752] [2021-11-20 23:16:22,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430779752] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:22,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261049953] [2021-11-20 23:16:22,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:22,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:22,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:22,927 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:22,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:16:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:23,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:16:23,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:23,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:23,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261049953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:23,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1281387796] [2021-11-20 23:16:23,204 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:16:23,204 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:23,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:23,214 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:23,214 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:16:24,639 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:16:24,906 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:16:24,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:16:24,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-20 23:16:24,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219979060] [2021-11-20 23:16:24,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:24,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:16:24,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:24,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:16:24,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-20 23:16:24,908 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:24,937 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-11-20 23:16:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:16:24,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 23:16:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:24,939 INFO L225 Difference]: With dead ends: 37 [2021-11-20 23:16:24,939 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 23:16:24,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-20 23:16:24,941 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:24,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:16:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 23:16:24,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2021-11-20 23:16:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.32) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:24,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-20 23:16:24,957 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 9 [2021-11-20 23:16:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:24,957 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-20 23:16:24,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:24,957 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-20 23:16:24,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 23:16:24,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:24,959 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:24,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:25,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:25,174 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:25,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1930754458, now seen corresponding path program 1 times [2021-11-20 23:16:25,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:25,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727346797] [2021-11-20 23:16:25,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:25,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:25,244 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:25,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727346797] [2021-11-20 23:16:25,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727346797] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:25,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560377000] [2021-11-20 23:16:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:25,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:25,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:25,256 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:25,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:16:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:25,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:16:25,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:25,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:25,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560377000] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:25,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1346288985] [2021-11-20 23:16:25,383 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-20 23:16:25,383 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:25,384 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:25,384 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:25,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:16:26,452 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:16:26,732 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:16:26,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:16:26,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-20 23:16:26,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572196747] [2021-11-20 23:16:26,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:26,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:16:26,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:26,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:16:26,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:16:26,734 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:26,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:26,781 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-11-20 23:16:26,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:16:26,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 23:16:26,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:26,782 INFO L225 Difference]: With dead ends: 33 [2021-11-20 23:16:26,782 INFO L226 Difference]: Without dead ends: 29 [2021-11-20 23:16:26,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-11-20 23:16:26,784 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:26,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:16:26,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-20 23:16:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-20 23:16:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-11-20 23:16:26,789 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 9 [2021-11-20 23:16:26,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:26,789 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-11-20 23:16:26,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:26,790 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-11-20 23:16:26,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 23:16:26,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:26,791 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1] [2021-11-20 23:16:26,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:27,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 23:16:27,007 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:27,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:27,007 INFO L85 PathProgramCache]: Analyzing trace with hash -770493215, now seen corresponding path program 1 times [2021-11-20 23:16:27,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:27,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855986990] [2021-11-20 23:16:27,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:27,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:27,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:27,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855986990] [2021-11-20 23:16:27,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855986990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:27,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051150615] [2021-11-20 23:16:27,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:27,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:27,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:27,108 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:27,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:16:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:27,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:16:27,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:27,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:27,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051150615] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:27,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1349744954] [2021-11-20 23:16:27,277 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:16:27,278 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:27,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:27,278 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:27,278 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:16:28,135 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:16:28,417 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:16:28,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:16:28,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-20 23:16:28,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925768965] [2021-11-20 23:16:28,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:28,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 23:16:28,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:28,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 23:16:28,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:16:28,419 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:28,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:28,538 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-11-20 23:16:28,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 23:16:28,538 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 23:16:28,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:28,539 INFO L225 Difference]: With dead ends: 50 [2021-11-20 23:16:28,539 INFO L226 Difference]: Without dead ends: 49 [2021-11-20 23:16:28,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2021-11-20 23:16:28,540 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:28,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 31 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:16:28,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-20 23:16:28,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-11-20 23:16:28,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:28,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-20 23:16:28,546 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 16 [2021-11-20 23:16:28,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:28,546 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-20 23:16:28,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:28,546 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-20 23:16:28,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 23:16:28,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:28,548 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1] [2021-11-20 23:16:28,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:28,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:28,760 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:28,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:28,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1458083994, now seen corresponding path program 2 times [2021-11-20 23:16:28,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:28,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053338006] [2021-11-20 23:16:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:28,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:28,848 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:28,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053338006] [2021-11-20 23:16:28,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053338006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:28,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301450924] [2021-11-20 23:16:28,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:16:28,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:28,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:28,864 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:28,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:16:28,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 23:16:28,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:16:28,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 23:16:28,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:28,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:29,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:29,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301450924] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:29,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [771958186] [2021-11-20 23:16:29,067 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-20 23:16:29,067 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:29,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:29,068 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:29,068 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:16:30,123 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:16:30,400 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:16:30,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:16:30,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-11-20 23:16:30,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969738218] [2021-11-20 23:16:30,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:30,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 23:16:30,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:30,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 23:16:30,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-11-20 23:16:30,403 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:30,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:30,538 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2021-11-20 23:16:30,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 23:16:30,539 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-20 23:16:30,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:30,542 INFO L225 Difference]: With dead ends: 55 [2021-11-20 23:16:30,542 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 23:16:30,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2021-11-20 23:16:30,544 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:30,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 46 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:16:30,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 23:16:30,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-11-20 23:16:30,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:30,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-11-20 23:16:30,560 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 19 [2021-11-20 23:16:30,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:30,560 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-11-20 23:16:30,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:30,561 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-11-20 23:16:30,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 23:16:30,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:30,562 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1] [2021-11-20 23:16:30,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:30,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 23:16:30,778 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:30,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:30,778 INFO L85 PathProgramCache]: Analyzing trace with hash 90474847, now seen corresponding path program 2 times [2021-11-20 23:16:30,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:30,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265010570] [2021-11-20 23:16:30,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:30,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:30,854 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:30,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265010570] [2021-11-20 23:16:30,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265010570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:30,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932316713] [2021-11-20 23:16:30,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:16:30,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:30,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:30,868 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:30,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:16:30,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 23:16:30,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:16:30,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:16:30,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:30,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:31,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932316713] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:31,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [398241664] [2021-11-20 23:16:31,055 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:16:31,056 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:31,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:31,056 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:31,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:16:31,883 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:16:32,134 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:16:32,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:16:32,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-20 23:16:32,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317128564] [2021-11-20 23:16:32,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:32,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 23:16:32,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:32,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 23:16:32,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-11-20 23:16:32,136 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:32,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:32,185 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2021-11-20 23:16:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:16:32,186 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-20 23:16:32,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:32,187 INFO L225 Difference]: With dead ends: 68 [2021-11-20 23:16:32,187 INFO L226 Difference]: Without dead ends: 67 [2021-11-20 23:16:32,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-11-20 23:16:32,188 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:32,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 47 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:16:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-20 23:16:32,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2021-11-20 23:16:32,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 57 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2021-11-20 23:16:32,202 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 24 [2021-11-20 23:16:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:32,202 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2021-11-20 23:16:32,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:32,203 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2021-11-20 23:16:32,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 23:16:32,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:32,204 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1] [2021-11-20 23:16:32,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-20 23:16:32,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 23:16:32,426 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:32,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:32,426 INFO L85 PathProgramCache]: Analyzing trace with hash -966167839, now seen corresponding path program 2 times [2021-11-20 23:16:32,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:32,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874899501] [2021-11-20 23:16:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:32,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:32,630 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:32,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874899501] [2021-11-20 23:16:32,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874899501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:32,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475763922] [2021-11-20 23:16:32,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:16:32,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:32,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:32,636 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:32,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:16:32,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-20 23:16:32,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:16:32,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 23:16:32,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:32,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:33,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475763922] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:33,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1599435306] [2021-11-20 23:16:33,036 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:16:33,037 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:33,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:33,037 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:33,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:16:33,819 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:16:34,057 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:16:34,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:16:34,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2021-11-20 23:16:34,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431187896] [2021-11-20 23:16:34,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:34,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 23:16:34,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:34,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 23:16:34,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 23:16:34,061 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 30 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:34,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:34,424 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-11-20 23:16:34,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 23:16:34,425 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-20 23:16:34,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:34,426 INFO L225 Difference]: With dead ends: 100 [2021-11-20 23:16:34,426 INFO L226 Difference]: Without dead ends: 99 [2021-11-20 23:16:34,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=592, Invalid=1958, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 23:16:34,428 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 101 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:34,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 70 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:16:34,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-20 23:16:34,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2021-11-20 23:16:34,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 79 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-11-20 23:16:34,443 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 36 [2021-11-20 23:16:34,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:34,444 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-11-20 23:16:34,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:34,444 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-11-20 23:16:34,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 23:16:34,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:34,445 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1] [2021-11-20 23:16:34,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:34,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 23:16:34,646 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:34,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:34,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1764780390, now seen corresponding path program 3 times [2021-11-20 23:16:34,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:34,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37808560] [2021-11-20 23:16:34,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:34,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:34,821 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:34,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37808560] [2021-11-20 23:16:34,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37808560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:34,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49140323] [2021-11-20 23:16:34,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:16:34,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:34,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:34,823 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:34,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 23:16:34,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:16:34,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:16:34,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 23:16:34,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:34,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:35,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49140323] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:35,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1270642789] [2021-11-20 23:16:35,256 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-20 23:16:35,256 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:35,256 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:35,256 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:35,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:16:36,061 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:16:36,338 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:16:36,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:16:36,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-11-20 23:16:36,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650312363] [2021-11-20 23:16:36,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:36,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 23:16:36,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:36,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 23:16:36,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1189, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 23:16:36,341 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 32 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:36,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:36,633 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2021-11-20 23:16:36,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 23:16:36,633 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-20 23:16:36,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:36,634 INFO L225 Difference]: With dead ends: 101 [2021-11-20 23:16:36,634 INFO L226 Difference]: Without dead ends: 92 [2021-11-20 23:16:36,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=644, Invalid=2112, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 23:16:36,637 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 116 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:36,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 71 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:16:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-20 23:16:36,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2021-11-20 23:16:36,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 79 states have (on average 1.0886075949367089) internal successors, (86), 81 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:36,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-11-20 23:16:36,645 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 39 [2021-11-20 23:16:36,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:36,645 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-11-20 23:16:36,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:36,646 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-11-20 23:16:36,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 23:16:36,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:36,647 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1] [2021-11-20 23:16:36,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:36,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:36,860 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:36,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:36,860 INFO L85 PathProgramCache]: Analyzing trace with hash -548616609, now seen corresponding path program 3 times [2021-11-20 23:16:36,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:36,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50867697] [2021-11-20 23:16:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:36,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:36,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:36,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50867697] [2021-11-20 23:16:36,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50867697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:36,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150367767] [2021-11-20 23:16:36,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:16:36,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:36,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:36,979 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:36,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 23:16:37,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:16:37,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:16:37,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 23:16:37,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:37,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:37,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150367767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:37,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1839845484] [2021-11-20 23:16:37,360 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:16:37,360 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:37,360 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:37,360 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:37,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:16:38,129 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:16:38,329 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:16:38,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:16:38,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-20 23:16:38,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401651304] [2021-11-20 23:16:38,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:38,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 23:16:38,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:38,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 23:16:38,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-11-20 23:16:38,333 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 24 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 24 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:38,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:38,416 INFO L93 Difference]: Finished difference Result 140 states and 151 transitions. [2021-11-20 23:16:38,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 23:16:38,417 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 24 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-20 23:16:38,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:38,422 INFO L225 Difference]: With dead ends: 140 [2021-11-20 23:16:38,422 INFO L226 Difference]: Without dead ends: 139 [2021-11-20 23:16:38,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-11-20 23:16:38,424 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 115 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:38,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 93 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:16:38,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-20 23:16:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 118. [2021-11-20 23:16:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 117 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 132 transitions. [2021-11-20 23:16:38,455 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 132 transitions. Word has length 54 [2021-11-20 23:16:38,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:38,455 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 132 transitions. [2021-11-20 23:16:38,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 24 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:38,456 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 132 transitions. [2021-11-20 23:16:38,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 23:16:38,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:38,464 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 1, 1, 1] [2021-11-20 23:16:38,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:38,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 23:16:38,683 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:38,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:38,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1878322913, now seen corresponding path program 3 times [2021-11-20 23:16:38,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:38,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477705743] [2021-11-20 23:16:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:38,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:39,051 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:39,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477705743] [2021-11-20 23:16:39,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477705743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:39,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749245870] [2021-11-20 23:16:39,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:16:39,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:39,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:39,069 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:39,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 23:16:39,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:16:39,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:16:39,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 23:16:39,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:39,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:40,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749245870] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:40,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1854171079] [2021-11-20 23:16:40,066 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:16:40,066 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:40,066 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:40,067 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:40,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:16:40,853 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:16:41,176 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:16:41,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:16:41,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2021-11-20 23:16:41,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523983179] [2021-11-20 23:16:41,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:41,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-20 23:16:41,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:41,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-20 23:16:41,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1014, Invalid=3678, Unknown=0, NotChecked=0, Total=4692 [2021-11-20 23:16:41,181 INFO L87 Difference]: Start difference. First operand 118 states and 132 transitions. Second operand has 62 states, 61 states have (on average 2.4754098360655736) internal successors, (151), 62 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:42,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:42,075 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2021-11-20 23:16:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-20 23:16:42,076 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.4754098360655736) internal successors, (151), 62 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-20 23:16:42,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:42,078 INFO L225 Difference]: With dead ends: 200 [2021-11-20 23:16:42,078 INFO L226 Difference]: Without dead ends: 199 [2021-11-20 23:16:42,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2348 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2440, Invalid=7262, Unknown=0, NotChecked=0, Total=9702 [2021-11-20 23:16:42,083 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 319 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:42,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 95 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:16:42,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-20 23:16:42,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 160. [2021-11-20 23:16:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 159 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 183 transitions. [2021-11-20 23:16:42,092 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 183 transitions. Word has length 76 [2021-11-20 23:16:42,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:42,093 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 183 transitions. [2021-11-20 23:16:42,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.4754098360655736) internal successors, (151), 62 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:42,094 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 183 transitions. [2021-11-20 23:16:42,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 23:16:42,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:42,095 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1] [2021-11-20 23:16:42,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:42,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 23:16:42,311 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:42,312 INFO L85 PathProgramCache]: Analyzing trace with hash -2010944154, now seen corresponding path program 4 times [2021-11-20 23:16:42,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:42,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951851] [2021-11-20 23:16:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:42,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:42,782 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:42,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951851] [2021-11-20 23:16:42,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:42,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735984385] [2021-11-20 23:16:42,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:16:42,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:42,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:42,787 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:42,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 23:16:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:42,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 23:16:42,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:43,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:43,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735984385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:43,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1208660176] [2021-11-20 23:16:43,819 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-20 23:16:43,819 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:43,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:43,820 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:43,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:16:44,658 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:16:45,011 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:16:45,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:16:45,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2021-11-20 23:16:45,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145745912] [2021-11-20 23:16:45,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:45,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-20 23:16:45,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:45,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-20 23:16:45,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1077, Invalid=3893, Unknown=0, NotChecked=0, Total=4970 [2021-11-20 23:16:45,022 INFO L87 Difference]: Start difference. First operand 160 states and 183 transitions. Second operand has 64 states, 63 states have (on average 2.492063492063492) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:45,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:45,759 INFO L93 Difference]: Finished difference Result 193 states and 208 transitions. [2021-11-20 23:16:45,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-20 23:16:45,759 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 2.492063492063492) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-20 23:16:45,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:45,761 INFO L225 Difference]: With dead ends: 193 [2021-11-20 23:16:45,761 INFO L226 Difference]: Without dead ends: 176 [2021-11-20 23:16:45,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2548, Invalid=7552, Unknown=0, NotChecked=0, Total=10100 [2021-11-20 23:16:45,765 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 296 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:45,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 117 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:16:45,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-20 23:16:45,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 162. [2021-11-20 23:16:45,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 159 states have (on average 1.069182389937107) internal successors, (170), 161 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:45,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 170 transitions. [2021-11-20 23:16:45,774 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 170 transitions. Word has length 79 [2021-11-20 23:16:45,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:45,780 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 170 transitions. [2021-11-20 23:16:45,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 2.492063492063492) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:45,781 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 170 transitions. [2021-11-20 23:16:45,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-20 23:16:45,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:45,783 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1] [2021-11-20 23:16:45,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:45,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 23:16:45,992 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:45,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:45,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1072496545, now seen corresponding path program 4 times [2021-11-20 23:16:45,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:45,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497568233] [2021-11-20 23:16:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:45,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:46,333 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:46,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497568233] [2021-11-20 23:16:46,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497568233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:46,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35331083] [2021-11-20 23:16:46,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:16:46,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:46,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:46,334 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:46,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 23:16:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:46,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 23:16:46,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:46,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:47,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35331083] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:47,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1290741989] [2021-11-20 23:16:47,372 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:16:47,372 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:47,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:47,372 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:47,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:16:48,152 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:16:48,400 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:16:48,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:16:48,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-20 23:16:48,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760819994] [2021-11-20 23:16:48,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:48,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 23:16:48,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:48,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 23:16:48,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1149, Invalid=1821, Unknown=0, NotChecked=0, Total=2970 [2021-11-20 23:16:48,402 INFO L87 Difference]: Start difference. First operand 162 states and 170 transitions. Second operand has 48 states, 47 states have (on average 4.829787234042553) internal successors, (227), 48 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:48,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:48,567 INFO L93 Difference]: Finished difference Result 284 states and 307 transitions. [2021-11-20 23:16:48,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-20 23:16:48,567 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.829787234042553) internal successors, (227), 48 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-20 23:16:48,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:48,569 INFO L225 Difference]: With dead ends: 284 [2021-11-20 23:16:48,569 INFO L226 Difference]: Without dead ends: 283 [2021-11-20 23:16:48,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1149, Invalid=1821, Unknown=0, NotChecked=0, Total=2970 [2021-11-20 23:16:48,572 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 194 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:48,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 181 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:16:48,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-20 23:16:48,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 238. [2021-11-20 23:16:48,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 235 states have (on average 1.1404255319148937) internal successors, (268), 237 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:48,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 268 transitions. [2021-11-20 23:16:48,582 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 268 transitions. Word has length 114 [2021-11-20 23:16:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:48,583 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 268 transitions. [2021-11-20 23:16:48,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.829787234042553) internal successors, (227), 48 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:48,583 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 268 transitions. [2021-11-20 23:16:48,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 23:16:48,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:48,586 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 1, 1, 1] [2021-11-20 23:16:48,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:48,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 23:16:48,807 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:48,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:48,808 INFO L85 PathProgramCache]: Analyzing trace with hash 679995105, now seen corresponding path program 4 times [2021-11-20 23:16:48,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:48,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069963660] [2021-11-20 23:16:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:48,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 2295 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:50,015 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:50,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069963660] [2021-11-20 23:16:50,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069963660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:50,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934629087] [2021-11-20 23:16:50,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:16:50,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:50,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:50,023 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:50,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 23:16:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:50,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-20 23:16:50,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 2295 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:50,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 2295 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:53,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934629087] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:53,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2140826389] [2021-11-20 23:16:53,188 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:16:53,188 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:53,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:53,189 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:53,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:16:53,929 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:16:54,360 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:16:54,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:16:54,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 125 [2021-11-20 23:16:54,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737789235] [2021-11-20 23:16:54,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:54,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-11-20 23:16:54,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:54,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-11-20 23:16:54,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4054, Invalid=13502, Unknown=0, NotChecked=0, Total=17556 [2021-11-20 23:16:54,370 INFO L87 Difference]: Start difference. First operand 238 states and 268 transitions. Second operand has 126 states, 125 states have (on average 2.488) internal successors, (311), 126 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:56,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:56,808 INFO L93 Difference]: Finished difference Result 400 states and 431 transitions. [2021-11-20 23:16:56,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-11-20 23:16:56,809 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 2.488) internal successors, (311), 126 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-11-20 23:16:56,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:56,811 INFO L225 Difference]: With dead ends: 400 [2021-11-20 23:16:56,811 INFO L226 Difference]: Without dead ends: 399 [2021-11-20 23:16:56,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9976, Invalid=27854, Unknown=0, NotChecked=0, Total=37830 [2021-11-20 23:16:56,816 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 744 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:56,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 168 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:16:56,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-11-20 23:16:56,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 320. [2021-11-20 23:16:56,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 317 states have (on average 1.1577287066246056) internal successors, (367), 319 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:56,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 367 transitions. [2021-11-20 23:16:56,826 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 367 transitions. Word has length 156 [2021-11-20 23:16:56,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:56,827 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 367 transitions. [2021-11-20 23:16:56,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 2.488) internal successors, (311), 126 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:56,827 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 367 transitions. [2021-11-20 23:16:56,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-20 23:16:56,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:56,829 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1] [2021-11-20 23:16:56,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:57,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 23:16:57,039 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:16:57,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:57,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1626507930, now seen corresponding path program 5 times [2021-11-20 23:16:57,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:57,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034677870] [2021-11-20 23:16:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:57,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:58,244 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:58,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034677870] [2021-11-20 23:16:58,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034677870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:58,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825999397] [2021-11-20 23:16:58,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:16:58,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:58,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:58,245 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:58,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 23:16:58,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-11-20 23:16:58,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:16:58,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 23:16:58,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:58,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:58,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:17:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:17:01,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825999397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:17:01,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1028554247] [2021-11-20 23:17:01,538 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-20 23:17:01,538 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:17:01,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:17:01,538 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:17:01,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:17:02,271 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:17:02,727 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:17:02,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:17:02,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 127 [2021-11-20 23:17:02,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083516] [2021-11-20 23:17:02,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:17:02,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-11-20 23:17:02,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:17:02,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-11-20 23:17:02,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4181, Invalid=13909, Unknown=0, NotChecked=0, Total=18090 [2021-11-20 23:17:02,732 INFO L87 Difference]: Start difference. First operand 320 states and 367 transitions. Second operand has 128 states, 127 states have (on average 2.4960629921259843) internal successors, (317), 128 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:17:05,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:17:05,362 INFO L93 Difference]: Finished difference Result 377 states and 408 transitions. [2021-11-20 23:17:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-11-20 23:17:05,363 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 127 states have (on average 2.4960629921259843) internal successors, (317), 128 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-11-20 23:17:05,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:17:05,364 INFO L225 Difference]: With dead ends: 377 [2021-11-20 23:17:05,364 INFO L226 Difference]: Without dead ends: 344 [2021-11-20 23:17:05,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9021 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=10196, Invalid=28416, Unknown=0, NotChecked=0, Total=38612 [2021-11-20 23:17:05,369 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 857 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:17:05,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 200 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:17:05,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-20 23:17:05,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 322. [2021-11-20 23:17:05,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 319 states have (on average 1.0595611285266457) internal successors, (338), 321 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:17:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 338 transitions. [2021-11-20 23:17:05,381 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 338 transitions. Word has length 159 [2021-11-20 23:17:05,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:17:05,381 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 338 transitions. [2021-11-20 23:17:05,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 127 states have (on average 2.4960629921259843) internal successors, (317), 128 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:17:05,382 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 338 transitions. [2021-11-20 23:17:05,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-20 23:17:05,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:17:05,385 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1] [2021-11-20 23:17:05,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 23:17:05,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:17:05,607 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:17:05,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:17:05,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1405717409, now seen corresponding path program 5 times [2021-11-20 23:17:05,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:17:05,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112424285] [2021-11-20 23:17:05,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:05,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:17:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:17:06,631 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:17:06,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112424285] [2021-11-20 23:17:06,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112424285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:17:06,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047713427] [2021-11-20 23:17:06,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:17:06,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:17:06,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:17:06,634 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:17:06,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 23:17:06,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-20 23:17:06,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:17:06,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-20 23:17:06,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:17:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:17:07,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:17:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:17:09,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047713427] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:17:09,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [647470728] [2021-11-20 23:17:09,902 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:17:09,902 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:17:09,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:17:09,902 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:17:09,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:17:10,624 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:17:10,967 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:17:10,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:17:10,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-11-20 23:17:10,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210993213] [2021-11-20 23:17:10,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:17:10,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-20 23:17:10,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:17:10,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-20 23:17:10,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4581, Invalid=5925, Unknown=0, NotChecked=0, Total=10506 [2021-11-20 23:17:10,970 INFO L87 Difference]: Start difference. First operand 322 states and 338 transitions. Second operand has 96 states, 95 states have (on average 4.91578947368421) internal successors, (467), 96 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:17:11,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:17:11,392 INFO L93 Difference]: Finished difference Result 572 states and 619 transitions. [2021-11-20 23:17:11,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-20 23:17:11,393 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 4.91578947368421) internal successors, (467), 96 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2021-11-20 23:17:11,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:17:11,396 INFO L225 Difference]: With dead ends: 572 [2021-11-20 23:17:11,396 INFO L226 Difference]: Without dead ends: 571 [2021-11-20 23:17:11,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 647 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4581, Invalid=5925, Unknown=0, NotChecked=0, Total=10506 [2021-11-20 23:17:11,398 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 431 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:17:11,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 357 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:17:11,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-20 23:17:11,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 478. [2021-11-20 23:17:11,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 475 states have (on average 1.1368421052631579) internal successors, (540), 477 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:17:11,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 540 transitions. [2021-11-20 23:17:11,415 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 540 transitions. Word has length 234 [2021-11-20 23:17:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:17:11,416 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 540 transitions. [2021-11-20 23:17:11,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 4.91578947368421) internal successors, (467), 96 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:17:11,417 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 540 transitions. [2021-11-20 23:17:11,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-20 23:17:11,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:17:11,422 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 62, 62, 1, 1, 1] [2021-11-20 23:17:11,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 23:17:11,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:17:11,648 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:17:11,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:17:11,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1067308769, now seen corresponding path program 5 times [2021-11-20 23:17:11,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:17:11,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937669357] [2021-11-20 23:17:11,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:11,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:17:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9703 backedges. 0 proven. 9703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:17:16,365 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:17:16,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937669357] [2021-11-20 23:17:16,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937669357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:17:16,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067878250] [2021-11-20 23:17:16,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:17:16,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:17:16,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:17:16,366 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:17:16,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 23:17:16,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2021-11-20 23:17:16,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:17:16,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 127 conjunts are in the unsatisfiable core [2021-11-20 23:17:16,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:17:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9703 backedges. 0 proven. 9703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:17:17,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:17:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9703 backedges. 0 proven. 9703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:17:28,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067878250] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:17:28,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [620185177] [2021-11-20 23:17:28,065 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:17:28,065 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:17:28,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:17:28,065 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:17:28,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:17:28,751 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:17:29,360 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:17:29,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:17:29,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127, 127] total 253 [2021-11-20 23:17:29,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197435229] [2021-11-20 23:17:29,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:17:29,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 254 states [2021-11-20 23:17:29,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:17:29,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 254 interpolants. [2021-11-20 23:17:29,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16278, Invalid=51582, Unknown=0, NotChecked=0, Total=67860 [2021-11-20 23:17:29,367 INFO L87 Difference]: Start difference. First operand 478 states and 540 transitions. Second operand has 254 states, 253 states have (on average 2.494071146245059) internal successors, (631), 254 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:17:39,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:17:39,636 INFO L93 Difference]: Finished difference Result 800 states and 863 transitions. [2021-11-20 23:17:39,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2021-11-20 23:17:39,637 INFO L78 Accepts]: Start accepts. Automaton has has 254 states, 253 states have (on average 2.494071146245059) internal successors, (631), 254 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 316 [2021-11-20 23:17:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:17:39,641 INFO L225 Difference]: With dead ends: 800 [2021-11-20 23:17:39,641 INFO L226 Difference]: Without dead ends: 799 [2021-11-20 23:17:39,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1199 GetRequests, 814 SyntacticMatches, 0 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34124 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=40408, Invalid=108974, Unknown=0, NotChecked=0, Total=149382 [2021-11-20 23:17:39,649 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 1734 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1734 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:17:39,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1734 Valid, 325 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 23:17:39,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-11-20 23:17:39,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 640. [2021-11-20 23:17:39,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 637 states have (on average 1.1538461538461537) internal successors, (735), 639 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:17:39,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 735 transitions. [2021-11-20 23:17:39,670 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 735 transitions. Word has length 316 [2021-11-20 23:17:39,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:17:39,671 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 735 transitions. [2021-11-20 23:17:39,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 254 states, 253 states have (on average 2.494071146245059) internal successors, (631), 254 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:17:39,672 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 735 transitions. [2021-11-20 23:17:39,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-20 23:17:39,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:17:39,677 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1, 1] [2021-11-20 23:17:39,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 23:17:39,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:17:39,899 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:17:39,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:17:39,899 INFO L85 PathProgramCache]: Analyzing trace with hash 552699238, now seen corresponding path program 6 times [2021-11-20 23:17:39,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:17:39,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195625144] [2021-11-20 23:17:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:39,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:17:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:17:44,560 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:17:44,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195625144] [2021-11-20 23:17:44,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195625144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:17:44,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482809548] [2021-11-20 23:17:44,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:17:44,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:17:44,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:17:44,561 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:17:44,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 23:17:44,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:17:44,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:17:44,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 128 conjunts are in the unsatisfiable core [2021-11-20 23:17:44,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:17:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:17:45,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:17:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:17:56,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482809548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:17:56,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [202786420] [2021-11-20 23:17:56,013 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-20 23:17:56,013 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:17:56,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:17:56,014 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:17:56,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:17:56,812 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:17:57,435 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:17:57,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:17:57,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128, 128] total 255 [2021-11-20 23:17:57,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921128506] [2021-11-20 23:17:57,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:17:57,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 256 states [2021-11-20 23:17:57,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:17:57,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 256 interpolants. [2021-11-20 23:17:57,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16533, Invalid=52373, Unknown=0, NotChecked=0, Total=68906 [2021-11-20 23:17:57,445 INFO L87 Difference]: Start difference. First operand 640 states and 735 transitions. Second operand has 256 states, 255 states have (on average 2.4980392156862745) internal successors, (637), 256 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:18:07,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:18:07,408 INFO L93 Difference]: Finished difference Result 745 states and 808 transitions. [2021-11-20 23:18:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2021-11-20 23:18:07,411 INFO L78 Accepts]: Start accepts. Automaton has has 256 states, 255 states have (on average 2.4980392156862745) internal successors, (637), 256 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 319 [2021-11-20 23:18:07,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:18:07,416 INFO L225 Difference]: With dead ends: 745 [2021-11-20 23:18:07,416 INFO L226 Difference]: Without dead ends: 680 [2021-11-20 23:18:07,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1209 GetRequests, 822 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34461 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=40852, Invalid=110080, Unknown=0, NotChecked=0, Total=150932 [2021-11-20 23:18:07,428 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1609 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:18:07,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1609 Valid, 325 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 23:18:07,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-11-20 23:18:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 642. [2021-11-20 23:18:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 639 states have (on average 1.054773082942097) internal successors, (674), 641 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:18:07,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 674 transitions. [2021-11-20 23:18:07,449 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 674 transitions. Word has length 319 [2021-11-20 23:18:07,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:18:07,450 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 674 transitions. [2021-11-20 23:18:07,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 256 states, 255 states have (on average 2.4980392156862745) internal successors, (637), 256 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:18:07,451 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 674 transitions. [2021-11-20 23:18:07,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-20 23:18:07,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:18:07,454 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 94, 94, 94, 1, 1, 1] [2021-11-20 23:18:07,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 23:18:07,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:18:07,679 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:18:07,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:18:07,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2066129825, now seen corresponding path program 6 times [2021-11-20 23:18:07,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:18:07,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006848307] [2021-11-20 23:18:07,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:07,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:18:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:18:11,146 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:18:11,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006848307] [2021-11-20 23:18:11,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006848307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:18:11,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836454760] [2021-11-20 23:18:11,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:18:11,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:18:11,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:18:11,168 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:18:11,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 23:18:11,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:18:11,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:18:11,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-20 23:18:11,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:18:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:18:12,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:18:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:18:21,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836454760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:18:21,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1758198513] [2021-11-20 23:18:21,457 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:18:21,457 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:18:21,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:18:21,457 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:18:21,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:18:22,209 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:18:22,736 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:18:22,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:18:22,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2021-11-20 23:18:22,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877664996] [2021-11-20 23:18:22,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:18:22,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-20 23:18:22,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:18:22,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-20 23:18:22,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18357, Invalid=21045, Unknown=0, NotChecked=0, Total=39402 [2021-11-20 23:18:22,746 INFO L87 Difference]: Start difference. First operand 642 states and 674 transitions. Second operand has 192 states, 191 states have (on average 4.958115183246074) internal successors, (947), 192 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:18:24,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:18:24,314 INFO L93 Difference]: Finished difference Result 1148 states and 1243 transitions. [2021-11-20 23:18:24,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-20 23:18:24,315 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 4.958115183246074) internal successors, (947), 192 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 474 [2021-11-20 23:18:24,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:18:24,322 INFO L225 Difference]: With dead ends: 1148 [2021-11-20 23:18:24,322 INFO L226 Difference]: Without dead ends: 1147 [2021-11-20 23:18:24,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1516 GetRequests, 1319 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1985 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=18357, Invalid=21045, Unknown=0, NotChecked=0, Total=39402 [2021-11-20 23:18:24,325 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 1225 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:18:24,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1225 Valid, 713 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:18:24,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-11-20 23:18:24,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 958. [2021-11-20 23:18:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 955 states have (on average 1.1350785340314136) internal successors, (1084), 957 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:18:24,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1084 transitions. [2021-11-20 23:18:24,356 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1084 transitions. Word has length 474 [2021-11-20 23:18:24,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:18:24,357 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 1084 transitions. [2021-11-20 23:18:24,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 4.958115183246074) internal successors, (947), 192 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:18:24,358 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1084 transitions. [2021-11-20 23:18:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2021-11-20 23:18:24,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:18:24,363 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 126, 126, 1, 1, 1] [2021-11-20 23:18:24,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 23:18:24,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 23:18:24,588 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:18:24,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:18:24,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2054572319, now seen corresponding path program 6 times [2021-11-20 23:18:24,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:18:24,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226160820] [2021-11-20 23:18:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:24,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:18:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 39879 backedges. 0 proven. 39879 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:18:41,424 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:18:41,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226160820] [2021-11-20 23:18:41,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226160820] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:18:41,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970491136] [2021-11-20 23:18:41,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:18:41,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:18:41,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:18:41,425 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:18:41,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 23:18:41,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:18:41,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:18:41,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1423 conjuncts, 255 conjunts are in the unsatisfiable core [2021-11-20 23:18:41,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:18:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 39879 backedges. 0 proven. 39879 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:18:43,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:19:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 39879 backedges. 0 proven. 39879 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:19:30,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970491136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:19:30,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1201556955] [2021-11-20 23:19:30,863 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:19:30,863 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:19:30,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:19:30,863 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:19:30,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:19:31,639 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:19:32,858 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:19:32,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:19:32,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [255, 255, 255] total 509 [2021-11-20 23:19:32,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76821500] [2021-11-20 23:19:32,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:19:32,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 510 states [2021-11-20 23:19:32,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:19:32,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 510 interpolants. [2021-11-20 23:19:32,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65302, Invalid=201470, Unknown=0, NotChecked=0, Total=266772 [2021-11-20 23:19:32,895 INFO L87 Difference]: Start difference. First operand 958 states and 1084 transitions. Second operand has 510 states, 509 states have (on average 2.4970530451866404) internal successors, (1271), 510 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:20:38,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:20:38,284 INFO L93 Difference]: Finished difference Result 1600 states and 1727 transitions. [2021-11-20 23:20:38,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 511 states. [2021-11-20 23:20:38,286 INFO L78 Accepts]: Start accepts. Automaton has has 510 states, 509 states have (on average 2.4970530451866404) internal successors, (1271), 510 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 636 [2021-11-20 23:20:38,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:20:38,296 INFO L225 Difference]: With dead ends: 1600 [2021-11-20 23:20:38,296 INFO L226 Difference]: Without dead ends: 1599 [2021-11-20 23:20:38,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2415 GetRequests, 1646 SyntacticMatches, 0 SemanticMatches, 769 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133836 ImplicationChecksByTransitivity, 96.3s TimeCoverageRelationStatistics Valid=162712, Invalid=430958, Unknown=0, NotChecked=0, Total=593670 [2021-11-20 23:20:38,349 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 4160 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4160 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:20:38,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4160 Valid, 615 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1570 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 23:20:38,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-11-20 23:20:38,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1280. [2021-11-20 23:20:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1277 states have (on average 1.1519185591229444) internal successors, (1471), 1279 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:20:38,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1471 transitions. [2021-11-20 23:20:38,395 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1471 transitions. Word has length 636 [2021-11-20 23:20:38,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:20:38,396 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 1471 transitions. [2021-11-20 23:20:38,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 510 states, 509 states have (on average 2.4970530451866404) internal successors, (1271), 510 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:20:38,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1471 transitions. [2021-11-20 23:20:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2021-11-20 23:20:38,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:20:38,404 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 127, 1, 1, 1, 1] [2021-11-20 23:20:38,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 23:20:38,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 23:20:38,620 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:20:38,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:20:38,620 INFO L85 PathProgramCache]: Analyzing trace with hash -184965786, now seen corresponding path program 7 times [2021-11-20 23:20:38,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:20:38,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499819517] [2021-11-20 23:20:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:38,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:20:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 40132 backedges. 0 proven. 40132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:20:57,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:20:57,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499819517] [2021-11-20 23:20:57,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499819517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:20:57,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145485028] [2021-11-20 23:20:57,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:20:57,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:20:57,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:20:57,475 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:20:57,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 23:20:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:57,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 1429 conjuncts, 256 conjunts are in the unsatisfiable core [2021-11-20 23:20:57,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:20:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 40132 backedges. 0 proven. 40132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:20:59,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:21:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 40132 backedges. 0 proven. 40132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:21:48,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145485028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:21:48,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [893669357] [2021-11-20 23:21:48,719 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-20 23:21:48,719 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:21:48,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:21:48,719 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:21:48,719 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:21:49,767 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:21:51,102 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:21:51,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:21:51,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [256, 256, 256] total 511 [2021-11-20 23:21:51,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287107637] [2021-11-20 23:21:51,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:21:51,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 512 states [2021-11-20 23:21:51,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:21:51,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 512 interpolants. [2021-11-20 23:21:51,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65813, Invalid=203029, Unknown=0, NotChecked=0, Total=268842 [2021-11-20 23:21:51,135 INFO L87 Difference]: Start difference. First operand 1280 states and 1471 transitions. Second operand has 512 states, 511 states have (on average 2.4990215264187867) internal successors, (1277), 512 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:22:58,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:22:58,416 INFO L93 Difference]: Finished difference Result 1481 states and 1608 transitions. [2021-11-20 23:22:58,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 511 states. [2021-11-20 23:22:58,418 INFO L78 Accepts]: Start accepts. Automaton has has 512 states, 511 states have (on average 2.4990215264187867) internal successors, (1277), 512 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 639 [2021-11-20 23:22:58,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:22:58,427 INFO L225 Difference]: With dead ends: 1481 [2021-11-20 23:22:58,427 INFO L226 Difference]: Without dead ends: 1352 [2021-11-20 23:22:58,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2425 GetRequests, 1654 SyntacticMatches, 0 SemanticMatches, 771 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134493 ImplicationChecksByTransitivity, 100.0s TimeCoverageRelationStatistics Valid=163604, Invalid=433152, Unknown=0, NotChecked=0, Total=596756 [2021-11-20 23:22:58,461 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 4113 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4113 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:22:58,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4113 Valid, 648 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 23:22:58,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-11-20 23:22:58,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1282. [2021-11-20 23:22:58,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1279 states have (on average 1.0523846755277562) internal successors, (1346), 1281 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:22:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1346 transitions. [2021-11-20 23:22:58,504 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1346 transitions. Word has length 639 [2021-11-20 23:22:58,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:22:58,506 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 1346 transitions. [2021-11-20 23:22:58,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 512 states, 511 states have (on average 2.4990215264187867) internal successors, (1277), 512 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:22:58,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1346 transitions. [2021-11-20 23:22:58,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2021-11-20 23:22:58,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:22:58,517 INFO L514 BasicCegarLoop]: trace histogram [191, 190, 190, 190, 190, 1, 1, 1] [2021-11-20 23:22:58,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 23:22:58,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 23:22:58,731 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:22:58,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:22:58,732 INFO L85 PathProgramCache]: Analyzing trace with hash -410047393, now seen corresponding path program 7 times [2021-11-20 23:22:58,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:22:58,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835282952] [2021-11-20 23:22:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:22:58,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:22:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:23:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:23:14,022 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:23:14,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835282952] [2021-11-20 23:23:14,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835282952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:23:14,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669043463] [2021-11-20 23:23:14,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:23:14,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:23:14,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:23:14,024 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:23:14,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 23:23:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:23:14,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 2121 conjuncts, 193 conjunts are in the unsatisfiable core [2021-11-20 23:23:14,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:23:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:23:16,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:23:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:23:58,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669043463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:23:58,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [553414794] [2021-11-20 23:23:58,751 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:23:58,751 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:23:58,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:23:58,752 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:23:58,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:23:59,623 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:24:00,773 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:24:00,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:24:00,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2021-11-20 23:24:00,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520900156] [2021-11-20 23:24:00,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:24:00,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-11-20 23:24:00,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:24:00,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-11-20 23:24:00,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73557, Invalid=78933, Unknown=0, NotChecked=0, Total=152490 [2021-11-20 23:24:00,796 INFO L87 Difference]: Start difference. First operand 1282 states and 1346 transitions. Second operand has 384 states, 383 states have (on average 4.97911227154047) internal successors, (1907), 384 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:24:13,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:24:13,891 INFO L93 Difference]: Finished difference Result 2300 states and 2491 transitions. [2021-11-20 23:24:13,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-20 23:24:13,892 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 383 states have (on average 4.97911227154047) internal successors, (1907), 384 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 954 [2021-11-20 23:24:13,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:24:13,907 INFO L225 Difference]: With dead ends: 2300 [2021-11-20 23:24:13,907 INFO L226 Difference]: Without dead ends: 2299 [2021-11-20 23:24:13,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3052 GetRequests, 2663 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4001 ImplicationChecksByTransitivity, 54.5s TimeCoverageRelationStatistics Valid=73557, Invalid=78933, Unknown=0, NotChecked=0, Total=152490 [2021-11-20 23:24:13,920 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 2117 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2117 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:24:13,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2117 Valid, 1423 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 23:24:13,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2021-11-20 23:24:13,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 1918. [2021-11-20 23:24:13,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1915 states have (on average 1.1342036553524804) internal successors, (2172), 1917 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:24:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2172 transitions. [2021-11-20 23:24:13,984 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2172 transitions. Word has length 954 [2021-11-20 23:24:13,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:24:13,986 INFO L470 AbstractCegarLoop]: Abstraction has 1918 states and 2172 transitions. [2021-11-20 23:24:13,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 383 states have (on average 4.97911227154047) internal successors, (1907), 384 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:24:13,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2172 transitions. [2021-11-20 23:24:14,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1277 [2021-11-20 23:24:14,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:24:14,004 INFO L514 BasicCegarLoop]: trace histogram [255, 255, 255, 254, 254, 1, 1, 1] [2021-11-20 23:24:14,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 23:24:14,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 23:24:14,231 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 23:24:14,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:24:14,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1885435617, now seen corresponding path program 7 times [2021-11-20 23:24:14,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:24:14,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787882730] [2021-11-20 23:24:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:24:14,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:24:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:25:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 161671 backedges. 0 proven. 161671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:25:30,188 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:25:30,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787882730] [2021-11-20 23:25:30,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787882730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:25:30,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987695968] [2021-11-20 23:25:30,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:25:30,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:25:30,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:25:30,190 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:25:30,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0812faa1-249e-4fa1-ab2b-c2fb93c872fc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 23:25:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:25:30,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 2831 conjuncts, 511 conjunts are in the unsatisfiable core [2021-11-20 23:25:30,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:25:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 161671 backedges. 0 proven. 161671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:25:33,810 INFO L328 TraceCheckSpWp]: Computing backward predicates...