./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-random1d-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/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_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-random1d-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/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 64bit --witnessprinter.graph.data.programhash f79e4118373e847e0fb27fcdde0c282d507ddb96f3173b4556e1de9cae44280f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:01:51,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:01:51,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:01:51,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:01:51,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:01:51,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:01:51,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:01:51,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:01:51,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:01:51,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:01:51,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:01:51,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:01:51,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:01:51,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:01:51,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:01:51,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:01:51,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:01:51,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:01:51,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:01:51,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:01:51,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:01:51,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:01:51,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:01:51,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:01:51,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:01:51,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:01:51,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:01:51,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:01:51,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:01:51,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:01:51,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:01:51,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:01:51,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:01:51,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:01:51,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:01:51,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:01:51,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:01:51,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:01:51,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:01:51,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:01:51,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:01:51,358 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-21 01:01:51,408 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:01:51,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:01:51,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:01:51,413 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:01:51,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:01:51,415 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:01:51,415 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:01:51,415 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:01:51,416 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:01:51,416 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:01:51,418 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:01:51,418 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:01:51,418 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:01:51,419 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:01:51,419 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:01:51,419 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:01:51,420 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:01:51,420 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:01:51,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:01:51,421 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:01:51,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:01:51,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:01:51,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:01:51,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:01:51,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:01:51,423 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-21 01:01:51,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:01:51,426 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:01:51,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:01:51,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:01:51,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:01:51,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:01:51,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:01:51,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:01:51,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:01:51,429 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:01:51,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:01:51,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:01:51,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:01:51,430 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:01:51,430 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_0a97b2e4-da79-40c8-af67-9f540741da04/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f79e4118373e847e0fb27fcdde0c282d507ddb96f3173b4556e1de9cae44280f [2021-11-21 01:01:51,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:01:51,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:01:51,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:01:51,822 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:01:51,823 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:01:51,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-random1d-1.c [2021-11-21 01:01:51,914 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/data/dce23352f/92c9d94d77294b6bb1b268330bb763c9/FLAG7ae95ed61 [2021-11-21 01:01:52,500 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:01:52,500 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-random1d-1.c [2021-11-21 01:01:52,507 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/data/dce23352f/92c9d94d77294b6bb1b268330bb763c9/FLAG7ae95ed61 [2021-11-21 01:01:52,889 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/data/dce23352f/92c9d94d77294b6bb1b268330bb763c9 [2021-11-21 01:01:52,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:01:52,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:01:52,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:01:52,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:01:52,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:01:52,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:01:52" (1/1) ... [2021-11-21 01:01:52,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@557c6fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:52, skipping insertion in model container [2021-11-21 01:01:52,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:01:52" (1/1) ... [2021-11-21 01:01:52,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:01:52,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:01:53,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:01:53,166 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:01:53,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:01:53,201 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:01:53,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:53 WrapperNode [2021-11-21 01:01:53,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:01:53,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:01:53,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:01:53,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:01:53,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:53" (1/1) ... [2021-11-21 01:01:53,222 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:53" (1/1) ... [2021-11-21 01:01:53,245 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 30 [2021-11-21 01:01:53,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:01:53,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:01:53,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:01:53,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:01:53,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:53" (1/1) ... [2021-11-21 01:01:53,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:53" (1/1) ... [2021-11-21 01:01:53,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:53" (1/1) ... [2021-11-21 01:01:53,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:53" (1/1) ... [2021-11-21 01:01:53,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:53" (1/1) ... [2021-11-21 01:01:53,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:53" (1/1) ... [2021-11-21 01:01:53,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:53" (1/1) ... [2021-11-21 01:01:53,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:01:53,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:01:53,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:01:53,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:01:53,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:53" (1/1) ... [2021-11-21 01:01:53,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:01:53,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:01:53,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:01:53,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:01:53,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:01:53,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:01:53,471 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:01:53,473 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:01:53,638 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:01:53,661 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:01:53,661 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:01:53,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:01:53 BoogieIcfgContainer [2021-11-21 01:01:53,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:01:53,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:01:53,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:01:53,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:01:53,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:01:52" (1/3) ... [2021-11-21 01:01:53,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8f6193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:01:53, skipping insertion in model container [2021-11-21 01:01:53,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:53" (2/3) ... [2021-11-21 01:01:53,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8f6193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:01:53, skipping insertion in model container [2021-11-21 01:01:53,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:01:53" (3/3) ... [2021-11-21 01:01:53,704 INFO L111 eAbstractionObserver]: Analyzing ICFG AliasDarteFeautrierGonnord-SAS2010-random1d-1.c [2021-11-21 01:01:53,711 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:01:53,726 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-21 01:01:53,784 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:01:53,793 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 [2021-11-21 01:01:53,793 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-21 01:01:53,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 17 states have internal predecessors, (20), 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) [2021-11-21 01:01:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 01:01:53,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:53,817 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 01:01:53,818 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)] === [2021-11-21 01:01:53,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:53,825 INFO L85 PathProgramCache]: Analyzing trace with hash 69427029, now seen corresponding path program 1 times [2021-11-21 01:01:53,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:53,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190116269] [2021-11-21 01:01:53,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:53,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:54,033 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:54,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190116269] [2021-11-21 01:01:54,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190116269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:54,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:54,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:01:54,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846253401] [2021-11-21 01:01:54,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:54,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:01:54,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:54,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:01:54,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:01:54,079 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 17 states have internal predecessors, (20), 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 2.5) 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) [2021-11-21 01:01:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:54,139 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-11-21 01:01:54,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:01:54,142 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 [2021-11-21 01:01:54,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:54,152 INFO L225 Difference]: With dead ends: 32 [2021-11-21 01:01:54,153 INFO L226 Difference]: Without dead ends: 26 [2021-11-21 01:01:54,156 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 [2021-11-21 01:01:54,161 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 23 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 [2021-11-21 01:01:54,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 23 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:01:54,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-21 01:01:54,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-11-21 01:01:54,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 22 states have internal predecessors, (28), 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) [2021-11-21 01:01:54,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-11-21 01:01:54,221 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 5 [2021-11-21 01:01:54,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:54,236 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-11-21 01:01:54,237 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) [2021-11-21 01:01:54,237 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-11-21 01:01:54,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:01:54,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:54,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:01:54,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:01:54,239 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 01:01:54,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:54,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2142729346, now seen corresponding path program 1 times [2021-11-21 01:01:54,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:54,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196876479] [2021-11-21 01:01:54,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:54,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:54,274 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:54,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196876479] [2021-11-21 01:01:54,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196876479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:54,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:54,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:01:54,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613751573] [2021-11-21 01:01:54,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:54,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:01:54,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:54,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:01:54,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:01:54,280 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-11-21 01:01:54,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:54,316 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-11-21 01:01:54,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:01:54,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2021-11-21 01:01:54,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:54,319 INFO L225 Difference]: With dead ends: 40 [2021-11-21 01:01:54,319 INFO L226 Difference]: Without dead ends: 38 [2021-11-21 01:01:54,320 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 [2021-11-21 01:01:54,322 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:54,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 17 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:01:54,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-21 01:01:54,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-11-21 01:01:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 35 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) [2021-11-21 01:01:54,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-11-21 01:01:54,332 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 6 [2021-11-21 01:01:54,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:54,333 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-11-21 01:01:54,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-11-21 01:01:54,334 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-11-21 01:01:54,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:01:54,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:54,335 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:54,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:01:54,336 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 01:01:54,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:54,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2000100226, now seen corresponding path program 1 times [2021-11-21 01:01:54,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:54,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330050200] [2021-11-21 01:01:54,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:54,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:54,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:54,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330050200] [2021-11-21 01:01:54,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330050200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:54,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:54,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:01:54,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770864444] [2021-11-21 01:01:54,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:54,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:01:54,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:54,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:01:54,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:01:54,373 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2021-11-21 01:01:54,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:54,396 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2021-11-21 01:01:54,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:01:54,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 [2021-11-21 01:01:54,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:54,400 INFO L225 Difference]: With dead ends: 42 [2021-11-21 01:01:54,400 INFO L226 Difference]: Without dead ends: 41 [2021-11-21 01:01:54,401 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 [2021-11-21 01:01:54,403 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 22 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 [2021-11-21 01:01:54,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 22 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:01:54,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-21 01:01:54,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-11-21 01:01:54,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 38 states have internal predecessors, (50), 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) [2021-11-21 01:01:54,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-11-21 01:01:54,427 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 7 [2021-11-21 01:01:54,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:54,428 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-11-21 01:01:54,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2021-11-21 01:01:54,429 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-11-21 01:01:54,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:01:54,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:54,430 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:54,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:01:54,430 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)] === [2021-11-21 01:01:54,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:54,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1873564800, now seen corresponding path program 1 times [2021-11-21 01:01:54,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:54,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980635064] [2021-11-21 01:01:54,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:54,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:54,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:54,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980635064] [2021-11-21 01:01:54,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980635064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:54,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:54,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:01:54,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746851926] [2021-11-21 01:01:54,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:54,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:01:54,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:54,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:01:54,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:01:54,480 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-21 01:01:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:54,513 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-11-21 01:01:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:01:54,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2021-11-21 01:01:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:54,515 INFO L225 Difference]: With dead ends: 39 [2021-11-21 01:01:54,517 INFO L226 Difference]: Without dead ends: 38 [2021-11-21 01:01:54,518 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 [2021-11-21 01:01:54,520 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 11 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 [2021-11-21 01:01:54,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 11 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:01:54,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-21 01:01:54,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-21 01:01:54,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 37 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) [2021-11-21 01:01:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-11-21 01:01:54,546 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 8 [2021-11-21 01:01:54,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:54,547 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-11-21 01:01:54,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-21 01:01:54,547 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-11-21 01:01:54,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:01:54,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:54,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:54,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:01:54,550 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 01:01:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:54,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2026065806, now seen corresponding path program 1 times [2021-11-21 01:01:54,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:54,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150971211] [2021-11-21 01:01:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:54,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:54,605 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:54,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150971211] [2021-11-21 01:01:54,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150971211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:01:54,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757013343] [2021-11-21 01:01:54,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:54,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:54,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:01:54,609 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:01:54,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:01:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:54,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:01:54,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:54,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:54,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757013343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:01:54,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1279545859] [2021-11-21 01:01:54,867 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:01:54,867 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:01:54,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:01:54,878 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:01:54,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:01:55,857 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:01:56,120 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:01:56,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:01:56,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-21 01:01:56,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316159398] [2021-11-21 01:01:56,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:01:56,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:01:56,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:56,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:01:56,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:01:56,123 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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) [2021-11-21 01:01:56,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:56,236 INFO L93 Difference]: Finished difference Result 97 states and 134 transitions. [2021-11-21 01:01:56,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:01:56,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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 11 [2021-11-21 01:01:56,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:56,244 INFO L225 Difference]: With dead ends: 97 [2021-11-21 01:01:56,244 INFO L226 Difference]: Without dead ends: 95 [2021-11-21 01:01:56,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:01:56,250 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:56,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 37 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:01:56,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-21 01:01:56,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2021-11-21 01:01:56,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.3972602739726028) internal successors, (102), 77 states have internal predecessors, (102), 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) [2021-11-21 01:01:56,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2021-11-21 01:01:56,270 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 11 [2021-11-21 01:01:56,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:56,271 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2021-11-21 01:01:56,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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) [2021-11-21 01:01:56,271 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2021-11-21 01:01:56,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:01:56,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:56,272 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:56,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:56,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:56,499 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 01:01:56,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:56,500 INFO L85 PathProgramCache]: Analyzing trace with hash -974279381, now seen corresponding path program 1 times [2021-11-21 01:01:56,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:56,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401875252] [2021-11-21 01:01:56,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:56,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:56,551 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:56,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401875252] [2021-11-21 01:01:56,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401875252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:01:56,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813895301] [2021-11-21 01:01:56,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:56,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:56,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:01:56,568 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:01:56,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:01:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:56,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:01:56,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:56,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:56,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:56,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813895301] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:01:56,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [41882761] [2021-11-21 01:01:56,697 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:01:56,698 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:01:56,698 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:01:56,698 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:01:56,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:01:57,260 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:01:57,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [41882761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:57,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:01:57,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 12 [2021-11-21 01:01:57,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623641419] [2021-11-21 01:01:57,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:57,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:01:57,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:57,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:01:57,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:01:57,486 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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) [2021-11-21 01:01:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:57,822 INFO L93 Difference]: Finished difference Result 103 states and 129 transitions. [2021-11-21 01:01:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:01:57,823 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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 12 [2021-11-21 01:01:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:57,824 INFO L225 Difference]: With dead ends: 103 [2021-11-21 01:01:57,824 INFO L226 Difference]: Without dead ends: 102 [2021-11-21 01:01:57,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:01:57,826 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:57,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 12 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:01:57,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-21 01:01:57,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2021-11-21 01:01:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.4) internal successors, (119), 89 states have internal predecessors, (119), 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) [2021-11-21 01:01:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2021-11-21 01:01:57,838 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 12 [2021-11-21 01:01:57,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:57,839 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2021-11-21 01:01:57,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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) [2021-11-21 01:01:57,839 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2021-11-21 01:01:57,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:01:57,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:57,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:57,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:58,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 01:01:58,057 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 01:01:58,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:58,058 INFO L85 PathProgramCache]: Analyzing trace with hash -974273423, now seen corresponding path program 1 times [2021-11-21 01:01:58,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:58,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57529172] [2021-11-21 01:01:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:58,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:58,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:58,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57529172] [2021-11-21 01:01:58,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57529172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:01:58,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736719145] [2021-11-21 01:01:58,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:58,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:58,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:01:58,121 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:01:58,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:01:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:58,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:01:58,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:58,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:58,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736719145] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:01:58,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [477746582] [2021-11-21 01:01:58,247 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:01:58,248 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:01:58,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:01:58,248 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:01:58,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:01:58,613 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:01:58,802 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:01:58,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:01:58,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-21 01:01:58,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218365274] [2021-11-21 01:01:58,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:01:58,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:01:58,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:58,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:01:58,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:01:58,804 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 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) [2021-11-21 01:01:58,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:58,879 INFO L93 Difference]: Finished difference Result 242 states and 342 transitions. [2021-11-21 01:01:58,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:01:58,879 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 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 12 [2021-11-21 01:01:58,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:58,882 INFO L225 Difference]: With dead ends: 242 [2021-11-21 01:01:58,882 INFO L226 Difference]: Without dead ends: 240 [2021-11-21 01:01:58,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:01:58,885 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:58,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:01:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-21 01:01:58,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 196. [2021-11-21 01:01:58,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.3717277486910995) internal successors, (262), 195 states have internal predecessors, (262), 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) [2021-11-21 01:01:58,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 262 transitions. [2021-11-21 01:01:58,923 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 262 transitions. Word has length 12 [2021-11-21 01:01:58,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:58,924 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 262 transitions. [2021-11-21 01:01:58,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 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) [2021-11-21 01:01:58,924 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 262 transitions. [2021-11-21 01:01:58,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:01:58,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:58,925 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-21 01:01:58,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:59,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:59,147 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)] === [2021-11-21 01:01:59,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:59,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1429056119, now seen corresponding path program 1 times [2021-11-21 01:01:59,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:59,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877200688] [2021-11-21 01:01:59,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:59,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:59,194 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:59,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877200688] [2021-11-21 01:01:59,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877200688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:01:59,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195307426] [2021-11-21 01:01:59,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:59,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:59,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:01:59,212 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:01:59,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:01:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:59,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:01:59,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:59,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:59,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195307426] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:01:59,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1743578346] [2021-11-21 01:01:59,323 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:01:59,323 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:01:59,324 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:01:59,324 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:01:59,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:01:59,832 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:02:00,033 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:02:00,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:02:00,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-21 01:02:00,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058128546] [2021-11-21 01:02:00,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:00,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:02:00,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:00,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:02:00,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:02:00,038 INFO L87 Difference]: Start difference. First operand 196 states and 262 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-11-21 01:02:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:00,071 INFO L93 Difference]: Finished difference Result 316 states and 420 transitions. [2021-11-21 01:02:00,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:02:00,072 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 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 13 [2021-11-21 01:02:00,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:00,074 INFO L225 Difference]: With dead ends: 316 [2021-11-21 01:02:00,075 INFO L226 Difference]: Without dead ends: 315 [2021-11-21 01:02:00,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:02:00,076 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:00,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 44 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:02:00,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-21 01:02:00,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2021-11-21 01:02:00,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.2741935483870968) internal successors, (395), 314 states have internal predecessors, (395), 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) [2021-11-21 01:02:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 395 transitions. [2021-11-21 01:02:00,094 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 395 transitions. Word has length 13 [2021-11-21 01:02:00,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:00,094 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 395 transitions. [2021-11-21 01:02:00,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-11-21 01:02:00,095 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 395 transitions. [2021-11-21 01:02:00,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 01:02:00,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:00,097 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1] [2021-11-21 01:02:00,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:00,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:00,323 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 01:02:00,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:00,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2043316153, now seen corresponding path program 2 times [2021-11-21 01:02:00,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:00,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706885544] [2021-11-21 01:02:00,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:00,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:00,402 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:00,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706885544] [2021-11-21 01:02:00,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706885544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:02:00,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180605687] [2021-11-21 01:02:00,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:02:00,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:00,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:00,420 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:00,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:02:00,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 01:02:00,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:02:00,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:02:00,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:00,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:00,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180605687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:00,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [579961376] [2021-11-21 01:02:00,635 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:02:00,636 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:02:00,636 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:02:00,636 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:02:00,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:02:01,080 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:02:01,281 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:02:01,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:02:01,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-21 01:02:01,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541854927] [2021-11-21 01:02:01,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:01,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:02:01,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:01,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:02:01,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:02:01,284 INFO L87 Difference]: Start difference. First operand 315 states and 395 transitions. Second operand has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 12 states have internal predecessors, (57), 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) [2021-11-21 01:02:01,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:01,405 INFO L93 Difference]: Finished difference Result 718 states and 984 transitions. [2021-11-21 01:02:01,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:02:01,406 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 12 states have internal predecessors, (57), 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 29 [2021-11-21 01:02:01,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:01,411 INFO L225 Difference]: With dead ends: 718 [2021-11-21 01:02:01,411 INFO L226 Difference]: Without dead ends: 716 [2021-11-21 01:02:01,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:02:01,413 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:01,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 78 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:02:01,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-21 01:02:01,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 527. [2021-11-21 01:02:01,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 522 states have (on average 1.3007662835249043) internal successors, (679), 526 states have internal predecessors, (679), 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) [2021-11-21 01:02:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 679 transitions. [2021-11-21 01:02:01,439 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 679 transitions. Word has length 29 [2021-11-21 01:02:01,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:01,440 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 679 transitions. [2021-11-21 01:02:01,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 12 states have internal predecessors, (57), 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) [2021-11-21 01:02:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 679 transitions. [2021-11-21 01:02:01,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 01:02:01,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:01,444 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1] [2021-11-21 01:02:01,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 01:02:01,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:01,659 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 01:02:01,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:01,659 INFO L85 PathProgramCache]: Analyzing trace with hash -357161224, now seen corresponding path program 2 times [2021-11-21 01:02:01,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:01,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331736038] [2021-11-21 01:02:01,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:01,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:01,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:01,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331736038] [2021-11-21 01:02:01,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331736038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:02:01,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225976568] [2021-11-21 01:02:01,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:02:01,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:01,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:01,716 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:01,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:02:01,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 01:02:01,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:02:01,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:02:01,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:01,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:01,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225976568] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:01,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [902210107] [2021-11-21 01:02:01,963 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:02:01,963 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:02:01,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:02:01,963 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:02:01,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:02:02,352 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:02:02,531 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:02:02,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:02:02,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-21 01:02:02,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581257999] [2021-11-21 01:02:02,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:02,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:02:02,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:02,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:02:02,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:02:02,532 INFO L87 Difference]: Start difference. First operand 527 states and 679 transitions. Second operand has 12 states, 11 states have (on average 5.363636363636363) internal successors, (59), 12 states have internal predecessors, (59), 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) [2021-11-21 01:02:02,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:02,680 INFO L93 Difference]: Finished difference Result 1325 states and 1829 transitions. [2021-11-21 01:02:02,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:02:02,680 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.363636363636363) internal successors, (59), 12 states have internal predecessors, (59), 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 30 [2021-11-21 01:02:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:02,689 INFO L225 Difference]: With dead ends: 1325 [2021-11-21 01:02:02,689 INFO L226 Difference]: Without dead ends: 1323 [2021-11-21 01:02:02,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:02:02,691 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:02,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 69 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:02:02,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2021-11-21 01:02:02,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 816. [2021-11-21 01:02:02,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 811 states have (on average 1.311960542540074) internal successors, (1064), 815 states have internal predecessors, (1064), 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) [2021-11-21 01:02:02,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1064 transitions. [2021-11-21 01:02:02,730 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1064 transitions. Word has length 30 [2021-11-21 01:02:02,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:02,731 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 1064 transitions. [2021-11-21 01:02:02,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.363636363636363) internal successors, (59), 12 states have internal predecessors, (59), 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) [2021-11-21 01:02:02,731 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1064 transitions. [2021-11-21 01:02:02,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-21 01:02:02,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:02,733 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1] [2021-11-21 01:02:02,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:02,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:02,946 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 01:02:02,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:02,947 INFO L85 PathProgramCache]: Analyzing trace with hash 826770402, now seen corresponding path program 2 times [2021-11-21 01:02:02,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:02,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476875276] [2021-11-21 01:02:02,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:02,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:03,017 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:03,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476875276] [2021-11-21 01:02:03,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476875276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:02:03,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756848605] [2021-11-21 01:02:03,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:02:03,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:03,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:03,020 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:03,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:02:03,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 01:02:03,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:02:03,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:02:03,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:03,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:03,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756848605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:03,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1780246866] [2021-11-21 01:02:03,264 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:02:03,264 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:02:03,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:02:03,264 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:02:03,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:02:03,735 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:02:03,917 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:02:03,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:02:03,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-21 01:02:03,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152561976] [2021-11-21 01:02:03,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:03,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:02:03,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:03,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:02:03,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:02:03,919 INFO L87 Difference]: Start difference. First operand 816 states and 1064 transitions. Second operand has 12 states, 11 states have (on average 5.545454545454546) internal successors, (61), 12 states have internal predecessors, (61), 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) [2021-11-21 01:02:04,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:04,035 INFO L93 Difference]: Finished difference Result 2024 states and 2646 transitions. [2021-11-21 01:02:04,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:02:04,036 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.545454545454546) internal successors, (61), 12 states have internal predecessors, (61), 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 31 [2021-11-21 01:02:04,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:04,047 INFO L225 Difference]: With dead ends: 2024 [2021-11-21 01:02:04,047 INFO L226 Difference]: Without dead ends: 2023 [2021-11-21 01:02:04,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:02:04,050 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:04,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:02:04,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-11-21 01:02:04,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 2023. [2021-11-21 01:02:04,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2018 states have (on average 1.207631318136769) internal successors, (2437), 2022 states have internal predecessors, (2437), 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) [2021-11-21 01:02:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 2437 transitions. [2021-11-21 01:02:04,132 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 2437 transitions. Word has length 31 [2021-11-21 01:02:04,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:04,132 INFO L470 AbstractCegarLoop]: Abstraction has 2023 states and 2437 transitions. [2021-11-21 01:02:04,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.545454545454546) internal successors, (61), 12 states have internal predecessors, (61), 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) [2021-11-21 01:02:04,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 2437 transitions. [2021-11-21 01:02:04,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-21 01:02:04,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:04,137 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1] [2021-11-21 01:02:04,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:04,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 01:02:04,363 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 01:02:04,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:04,363 INFO L85 PathProgramCache]: Analyzing trace with hash 84797903, now seen corresponding path program 3 times [2021-11-21 01:02:04,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:04,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371904792] [2021-11-21 01:02:04,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:04,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:04,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:04,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371904792] [2021-11-21 01:02:04,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371904792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:02:04,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544829672] [2021-11-21 01:02:04,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:02:04,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:04,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:04,520 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:04,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:02:04,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:02:04,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:02:04,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:02:04,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:04,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:05,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544829672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:05,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1489862638] [2021-11-21 01:02:05,048 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:02:05,048 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:02:05,048 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:02:05,048 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:02:05,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:02:05,448 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:02:05,607 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:02:05,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:02:05,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-21 01:02:05,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744085509] [2021-11-21 01:02:05,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:05,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 01:02:05,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:05,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 01:02:05,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:02:05,609 INFO L87 Difference]: Start difference. First operand 2023 states and 2437 transitions. Second operand has 24 states, 23 states have (on average 5.608695652173913) internal successors, (129), 24 states have internal predecessors, (129), 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) [2021-11-21 01:02:05,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:05,936 INFO L93 Difference]: Finished difference Result 4679 states and 6143 transitions. [2021-11-21 01:02:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 01:02:05,937 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.608695652173913) internal successors, (129), 24 states have internal predecessors, (129), 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 65 [2021-11-21 01:02:05,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:05,961 INFO L225 Difference]: With dead ends: 4679 [2021-11-21 01:02:05,962 INFO L226 Difference]: Without dead ends: 4677 [2021-11-21 01:02:05,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:02:05,967 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 208 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:05,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 160 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:02:05,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4677 states. [2021-11-21 01:02:06,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4677 to 3082. [2021-11-21 01:02:06,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 3077 states have (on average 1.2317192070198244) internal successors, (3790), 3081 states have internal predecessors, (3790), 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) [2021-11-21 01:02:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 3790 transitions. [2021-11-21 01:02:06,109 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 3790 transitions. Word has length 65 [2021-11-21 01:02:06,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:06,109 INFO L470 AbstractCegarLoop]: Abstraction has 3082 states and 3790 transitions. [2021-11-21 01:02:06,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.608695652173913) internal successors, (129), 24 states have internal predecessors, (129), 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) [2021-11-21 01:02:06,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 3790 transitions. [2021-11-21 01:02:06,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 01:02:06,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:06,115 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1] [2021-11-21 01:02:06,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:06,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 01:02:06,331 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 01:02:06,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:06,331 INFO L85 PathProgramCache]: Analyzing trace with hash 419659974, now seen corresponding path program 3 times [2021-11-21 01:02:06,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:06,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764569091] [2021-11-21 01:02:06,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:06,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:06,482 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:06,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764569091] [2021-11-21 01:02:06,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764569091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:02:06,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120797959] [2021-11-21 01:02:06,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:02:06,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:06,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:06,483 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:06,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:02:06,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:02:06,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:02:06,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:02:06,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:06,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:07,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120797959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:07,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1848093619] [2021-11-21 01:02:07,019 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:02:07,020 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:02:07,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:02:07,020 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:02:07,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:02:07,391 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:02:07,526 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:02:07,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:02:07,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-21 01:02:07,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590223884] [2021-11-21 01:02:07,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:07,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 01:02:07,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:07,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 01:02:07,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=627, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:02:07,528 INFO L87 Difference]: Start difference. First operand 3082 states and 3790 transitions. Second operand has 24 states, 23 states have (on average 5.695652173913044) internal successors, (131), 24 states have internal predecessors, (131), 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) [2021-11-21 01:02:07,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:07,895 INFO L93 Difference]: Finished difference Result 7642 states and 10096 transitions. [2021-11-21 01:02:07,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 01:02:07,896 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.695652173913044) internal successors, (131), 24 states have internal predecessors, (131), 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 66 [2021-11-21 01:02:07,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:07,937 INFO L225 Difference]: With dead ends: 7642 [2021-11-21 01:02:07,937 INFO L226 Difference]: Without dead ends: 7640 [2021-11-21 01:02:07,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=627, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:02:07,945 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 333 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:07,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 141 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:02:07,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7640 states. [2021-11-21 01:02:08,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7640 to 3904. [2021-11-21 01:02:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3904 states, 3899 states have (on average 1.24852526288792) internal successors, (4868), 3903 states have internal predecessors, (4868), 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) [2021-11-21 01:02:08,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3904 states to 3904 states and 4868 transitions. [2021-11-21 01:02:08,179 INFO L78 Accepts]: Start accepts. Automaton has 3904 states and 4868 transitions. Word has length 66 [2021-11-21 01:02:08,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:08,180 INFO L470 AbstractCegarLoop]: Abstraction has 3904 states and 4868 transitions. [2021-11-21 01:02:08,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.695652173913044) internal successors, (131), 24 states have internal predecessors, (131), 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) [2021-11-21 01:02:08,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3904 states and 4868 transitions. [2021-11-21 01:02:08,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 01:02:08,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:08,186 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 1, 1, 1] [2021-11-21 01:02:08,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:08,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:08,411 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 01:02:08,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:08,411 INFO L85 PathProgramCache]: Analyzing trace with hash -113592200, now seen corresponding path program 3 times [2021-11-21 01:02:08,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:08,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720665285] [2021-11-21 01:02:08,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:08,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:08,554 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:08,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720665285] [2021-11-21 01:02:08,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720665285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:02:08,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73687837] [2021-11-21 01:02:08,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:02:08,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:08,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:08,555 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:08,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:02:08,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:02:08,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:02:08,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:02:08,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:08,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:09,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73687837] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:09,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603608223] [2021-11-21 01:02:09,120 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:02:09,120 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:02:09,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:02:09,120 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:02:09,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:02:09,589 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:02:09,767 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:02:09,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:02:09,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-21 01:02:09,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024191353] [2021-11-21 01:02:09,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:09,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 01:02:09,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:09,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 01:02:09,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=684, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:02:09,770 INFO L87 Difference]: Start difference. First operand 3904 states and 4868 transitions. Second operand has 24 states, 23 states have (on average 5.782608695652174) internal successors, (133), 24 states have internal predecessors, (133), 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) [2021-11-21 01:02:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:10,283 INFO L93 Difference]: Finished difference Result 13793 states and 17626 transitions. [2021-11-21 01:02:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 01:02:10,284 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.782608695652174) internal successors, (133), 24 states have internal predecessors, (133), 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 67 [2021-11-21 01:02:10,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:10,393 INFO L225 Difference]: With dead ends: 13793 [2021-11-21 01:02:10,402 INFO L226 Difference]: Without dead ends: 13792 [2021-11-21 01:02:10,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=308, Invalid=684, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:02:10,415 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 171 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:10,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 160 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:02:10,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13792 states. [2021-11-21 01:02:11,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13792 to 13792. [2021-11-21 01:02:11,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13792 states, 13787 states have (on average 1.1689272503082615) internal successors, (16116), 13791 states have internal predecessors, (16116), 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) [2021-11-21 01:02:11,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13792 states to 13792 states and 16116 transitions. [2021-11-21 01:02:11,211 INFO L78 Accepts]: Start accepts. Automaton has 13792 states and 16116 transitions. Word has length 67 [2021-11-21 01:02:11,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:11,212 INFO L470 AbstractCegarLoop]: Abstraction has 13792 states and 16116 transitions. [2021-11-21 01:02:11,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.782608695652174) internal successors, (133), 24 states have internal predecessors, (133), 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) [2021-11-21 01:02:11,212 INFO L276 IsEmpty]: Start isEmpty. Operand 13792 states and 16116 transitions. [2021-11-21 01:02:11,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-21 01:02:11,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:11,252 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1] [2021-11-21 01:02:11,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:11,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:11,468 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 01:02:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:11,469 INFO L85 PathProgramCache]: Analyzing trace with hash 65778939, now seen corresponding path program 4 times [2021-11-21 01:02:11,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:11,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215269812] [2021-11-21 01:02:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:11,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:11,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:11,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215269812] [2021-11-21 01:02:11,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215269812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:02:11,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859902639] [2021-11-21 01:02:11,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:02:11,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:11,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:11,822 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:11,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:02:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:11,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 01:02:11,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:12,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:13,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859902639] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:13,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1714747625] [2021-11-21 01:02:13,241 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:02:13,241 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:02:13,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:02:13,242 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:02:13,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:02:13,664 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:02:13,899 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:02:13,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:02:13,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-21 01:02:13,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645833037] [2021-11-21 01:02:13,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:13,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 01:02:13,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:13,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 01:02:13,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=1921, Unknown=0, NotChecked=0, Total=3080 [2021-11-21 01:02:13,905 INFO L87 Difference]: Start difference. First operand 13792 states and 16116 transitions. Second operand has 48 states, 47 states have (on average 5.808510638297872) internal successors, (273), 48 states have internal predecessors, (273), 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) [2021-11-21 01:02:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:15,324 INFO L93 Difference]: Finished difference Result 32911 states and 41407 transitions. [2021-11-21 01:02:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-21 01:02:15,327 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 5.808510638297872) internal successors, (273), 48 states have internal predecessors, (273), 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 137 [2021-11-21 01:02:15,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:15,393 INFO L225 Difference]: With dead ends: 32911 [2021-11-21 01:02:15,393 INFO L226 Difference]: Without dead ends: 32909 [2021-11-21 01:02:15,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1159, Invalid=1921, Unknown=0, NotChecked=0, Total=3080 [2021-11-21 01:02:15,428 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 617 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:15,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 320 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:02:15,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32909 states. [2021-11-21 01:02:16,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32909 to 18774. [2021-11-21 01:02:16,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18774 states, 18769 states have (on average 1.1893015078054239) internal successors, (22322), 18773 states have internal predecessors, (22322), 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) [2021-11-21 01:02:16,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18774 states to 18774 states and 22322 transitions. [2021-11-21 01:02:16,579 INFO L78 Accepts]: Start accepts. Automaton has 18774 states and 22322 transitions. Word has length 137 [2021-11-21 01:02:16,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:16,580 INFO L470 AbstractCegarLoop]: Abstraction has 18774 states and 22322 transitions. [2021-11-21 01:02:16,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 5.808510638297872) internal successors, (273), 48 states have internal predecessors, (273), 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) [2021-11-21 01:02:16,581 INFO L276 IsEmpty]: Start isEmpty. Operand 18774 states and 22322 transitions. [2021-11-21 01:02:16,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-21 01:02:16,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:16,619 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 1, 1, 1] [2021-11-21 01:02:16,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:16,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 01:02:16,834 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 01:02:16,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:16,835 INFO L85 PathProgramCache]: Analyzing trace with hash 110413666, now seen corresponding path program 4 times [2021-11-21 01:02:16,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:16,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910646376] [2021-11-21 01:02:16,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:16,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 1474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:17,243 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:17,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910646376] [2021-11-21 01:02:17,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910646376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:02:17,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481408112] [2021-11-21 01:02:17,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:02:17,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:17,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:17,245 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:17,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 01:02:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:17,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 01:02:17,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 1474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:17,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 1474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:19,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481408112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:19,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1313359122] [2021-11-21 01:02:19,087 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:02:19,088 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:02:19,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:02:19,088 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:02:19,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:02:19,512 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:02:19,787 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:02:19,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:02:19,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-21 01:02:19,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15543635] [2021-11-21 01:02:19,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:19,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 01:02:19,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:19,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 01:02:19,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=1815, Unknown=0, NotChecked=0, Total=2970 [2021-11-21 01:02:19,798 INFO L87 Difference]: Start difference. First operand 18774 states and 22322 transitions. Second operand has 48 states, 47 states have (on average 5.851063829787234) internal successors, (275), 48 states have internal predecessors, (275), 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) [2021-11-21 01:02:21,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:21,585 INFO L93 Difference]: Finished difference Result 50455 states and 64089 transitions. [2021-11-21 01:02:21,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-21 01:02:21,585 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 5.851063829787234) internal successors, (275), 48 states have internal predecessors, (275), 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 138 [2021-11-21 01:02:21,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:21,688 INFO L225 Difference]: With dead ends: 50455 [2021-11-21 01:02:21,689 INFO L226 Difference]: Without dead ends: 50453 [2021-11-21 01:02:21,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1155, Invalid=1815, Unknown=0, NotChecked=0, Total=2970 [2021-11-21 01:02:21,703 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 571 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:21,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 285 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:02:21,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50453 states. [2021-11-21 01:02:23,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50453 to 21600. [2021-11-21 01:02:23,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21600 states, 21595 states have (on average 1.201203982403334) internal successors, (25940), 21599 states have internal predecessors, (25940), 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) [2021-11-21 01:02:23,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21600 states to 21600 states and 25940 transitions. [2021-11-21 01:02:23,243 INFO L78 Accepts]: Start accepts. Automaton has 21600 states and 25940 transitions. Word has length 138 [2021-11-21 01:02:23,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:23,244 INFO L470 AbstractCegarLoop]: Abstraction has 21600 states and 25940 transitions. [2021-11-21 01:02:23,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 5.851063829787234) internal successors, (275), 48 states have internal predecessors, (275), 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) [2021-11-21 01:02:23,244 INFO L276 IsEmpty]: Start isEmpty. Operand 21600 states and 25940 transitions. [2021-11-21 01:02:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-21 01:02:23,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:23,287 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 1, 1, 1] [2021-11-21 01:02:23,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:23,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 01:02:23,511 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 01:02:23,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:23,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1210947420, now seen corresponding path program 4 times [2021-11-21 01:02:23,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:23,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675258050] [2021-11-21 01:02:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:23,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:23,952 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:23,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675258050] [2021-11-21 01:02:23,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675258050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:02:23,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796784285] [2021-11-21 01:02:23,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:02:23,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:23,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:23,955 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:23,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 01:02:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:24,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 01:02:24,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:24,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:25,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796784285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:25,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [161245436] [2021-11-21 01:02:25,577 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:02:25,577 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:02:25,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:02:25,578 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:02:25,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:02:26,026 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:02:26,308 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:02:26,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:02:26,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-21 01:02:26,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386300578] [2021-11-21 01:02:26,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:26,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 01:02:26,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:26,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 01:02:26,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1160, Invalid=1920, Unknown=0, NotChecked=0, Total=3080 [2021-11-21 01:02:26,313 INFO L87 Difference]: Start difference. First operand 21600 states and 25940 transitions. Second operand has 48 states, 47 states have (on average 5.8936170212765955) internal successors, (277), 48 states have internal predecessors, (277), 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) [2021-11-21 01:02:30,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:30,658 INFO L93 Difference]: Finished difference Result 100079 states and 125868 transitions. [2021-11-21 01:02:30,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-21 01:02:30,659 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 5.8936170212765955) internal successors, (277), 48 states have internal predecessors, (277), 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 139 [2021-11-21 01:02:30,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:30,774 INFO L225 Difference]: With dead ends: 100079 [2021-11-21 01:02:30,774 INFO L226 Difference]: Without dead ends: 100078 [2021-11-21 01:02:30,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1160, Invalid=1920, Unknown=0, NotChecked=0, Total=3080 [2021-11-21 01:02:30,801 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 465 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:30,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 308 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:02:30,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100078 states. [2021-11-21 01:02:36,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100078 to 100078. [2021-11-21 01:02:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100078 states, 100073 states have (on average 1.1478720534010172) internal successors, (114871), 100077 states have internal predecessors, (114871), 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) [2021-11-21 01:02:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100078 states to 100078 states and 114871 transitions. [2021-11-21 01:02:37,353 INFO L78 Accepts]: Start accepts. Automaton has 100078 states and 114871 transitions. Word has length 139 [2021-11-21 01:02:37,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:37,353 INFO L470 AbstractCegarLoop]: Abstraction has 100078 states and 114871 transitions. [2021-11-21 01:02:37,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 5.8936170212765955) internal successors, (277), 48 states have internal predecessors, (277), 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) [2021-11-21 01:02:37,354 INFO L276 IsEmpty]: Start isEmpty. Operand 100078 states and 114871 transitions. [2021-11-21 01:02:37,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-21 01:02:37,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:37,520 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 1, 1, 1] [2021-11-21 01:02:37,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:02:37,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:37,747 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 01:02:37,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:37,747 INFO L85 PathProgramCache]: Analyzing trace with hash 465397587, now seen corresponding path program 5 times [2021-11-21 01:02:37,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:37,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263459668] [2021-11-21 01:02:37,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:37,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6348 backedges. 0 proven. 6348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:39,109 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:39,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263459668] [2021-11-21 01:02:39,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263459668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:02:39,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026140340] [2021-11-21 01:02:39,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:02:39,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:02:39,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:02:39,111 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:02:39,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 01:02:39,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-21 01:02:39,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:02:39,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-21 01:02:39,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:02:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6348 backedges. 0 proven. 6348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:40,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6348 backedges. 0 proven. 6348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:02:43,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026140340] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:43,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [696106472] [2021-11-21 01:02:43,376 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:02:43,376 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:02:43,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:02:43,377 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:02:43,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:02:43,773 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:02:44,072 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:02:44,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:02:44,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-11-21 01:02:44,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641738534] [2021-11-21 01:02:44,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:44,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-21 01:02:44,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:44,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-21 01:02:44,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4591, Invalid=6121, Unknown=0, NotChecked=0, Total=10712 [2021-11-21 01:02:44,080 INFO L87 Difference]: Start difference. First operand 100078 states and 114871 transitions. Second operand has 96 states, 95 states have (on average 5.905263157894737) internal successors, (561), 96 states have internal predecessors, (561), 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) [2021-11-21 01:02:55,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:55,070 INFO L93 Difference]: Finished difference Result 262112 states and 318584 transitions. [2021-11-21 01:02:55,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-21 01:02:55,071 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 5.905263157894737) internal successors, (561), 96 states have internal predecessors, (561), 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 281 [2021-11-21 01:02:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:55,381 INFO L225 Difference]: With dead ends: 262112 [2021-11-21 01:02:55,381 INFO L226 Difference]: Without dead ends: 262110 [2021-11-21 01:02:55,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 787 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4591, Invalid=6121, Unknown=0, NotChecked=0, Total=10712 [2021-11-21 01:02:55,452 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 1111 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 961 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 961 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:55,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1111 Valid, 661 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [961 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:02:55,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262110 states. [2021-11-21 01:03:02,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262110 to 123814. [2021-11-21 01:03:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123814 states, 123809 states have (on average 1.1621691476387015) internal successors, (143887), 123813 states have internal predecessors, (143887), 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) [2021-11-21 01:03:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123814 states to 123814 states and 143887 transitions. [2021-11-21 01:03:03,206 INFO L78 Accepts]: Start accepts. Automaton has 123814 states and 143887 transitions. Word has length 281 [2021-11-21 01:03:03,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:03:03,207 INFO L470 AbstractCegarLoop]: Abstraction has 123814 states and 143887 transitions. [2021-11-21 01:03:03,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 5.905263157894737) internal successors, (561), 96 states have internal predecessors, (561), 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) [2021-11-21 01:03:03,207 INFO L276 IsEmpty]: Start isEmpty. Operand 123814 states and 143887 transitions. [2021-11-21 01:03:03,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-21 01:03:03,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:03:03,378 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 46, 1, 1, 1] [2021-11-21 01:03:03,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:03:03,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 01:03:03,595 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 01:03:03,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:03:03,595 INFO L85 PathProgramCache]: Analyzing trace with hash -824991590, now seen corresponding path program 5 times [2021-11-21 01:03:03,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:03:03,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655196157] [2021-11-21 01:03:03,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:03:03,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:03:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:03:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6394 backedges. 0 proven. 6394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:03:04,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:03:04,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655196157] [2021-11-21 01:03:04,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655196157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:03:04,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769866695] [2021-11-21 01:03:04,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:03:04,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:03:04,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:03:04,912 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:03:04,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a97b2e4-da79-40c8-af67-9f540741da04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 01:03:05,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-21 01:03:05,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:03:05,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-21 01:03:05,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:03:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6394 backedges. 0 proven. 6394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:03:05,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:03:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6394 backedges. 0 proven. 6394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:03:08,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769866695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:03:08,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1377961542] [2021-11-21 01:03:08,962 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:03:08,963 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:03:08,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:03:08,963 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:03:08,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:03:09,322 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:03:09,597 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:03:09,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:03:09,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-11-21 01:03:09,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820274409] [2021-11-21 01:03:09,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:03:09,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-21 01:03:09,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:03:09,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-21 01:03:09,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4587, Invalid=5919, Unknown=0, NotChecked=0, Total=10506 [2021-11-21 01:03:09,605 INFO L87 Difference]: Start difference. First operand 123814 states and 143887 transitions. Second operand has 96 states, 95 states have (on average 5.926315789473684) internal successors, (563), 96 states have internal predecessors, (563), 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) [2021-11-21 01:03:25,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:03:25,268 INFO L93 Difference]: Finished difference Result 380530 states and 468832 transitions. [2021-11-21 01:03:25,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-21 01:03:25,269 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 5.926315789473684) internal successors, (563), 96 states have internal predecessors, (563), 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 282 [2021-11-21 01:03:25,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:03:25,804 INFO L225 Difference]: With dead ends: 380530 [2021-11-21 01:03:25,804 INFO L226 Difference]: Without dead ends: 380528 [2021-11-21 01:03:25,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 791 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4587, Invalid=5919, Unknown=0, NotChecked=0, Total=10506 [2021-11-21 01:03:25,906 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1270 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 1258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1270 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1258 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:03:25,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1270 Valid, 573 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1258 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 01:03:26,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380528 states.