./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/deep-nested.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:42:55,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:42:55,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:42:55,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:42:55,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:42:55,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:42:55,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:42:55,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:42:55,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:42:55,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:42:55,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:42:55,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:42:55,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:42:55,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:42:55,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:42:55,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:42:55,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:42:55,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:42:55,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:42:55,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:42:55,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:42:55,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:42:55,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:42:55,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:42:55,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:42:55,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:42:55,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:42:55,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:42:55,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:42:55,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:42:55,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:42:55,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:42:55,659 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:42:55,660 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:42:55,662 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:42:55,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:42:55,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:42:55,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:42:55,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:42:55,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:42:55,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:42:55,666 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:42:55,699 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:42:55,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:42:55,700 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:42:55,700 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:42:55,701 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:42:55,701 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:42:55,701 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:42:55,701 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:42:55,702 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:42:55,702 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:42:55,703 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:42:55,703 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:42:55,703 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:42:55,703 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:42:55,704 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:42:55,704 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:42:55,704 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:42:55,704 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:42:55,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:42:55,705 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:42:55,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:42:55,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:42:55,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:42:55,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:42:55,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:42:55,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:42:55,708 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:42:55,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:42:55,709 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:42:55,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:42:55,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:42:55,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:42:55,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:42:55,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:42:55,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:42:55,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:42:55,710 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:42:55,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:42:55,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:42:55,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:42:55,711 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:42:55,711 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_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 [2021-11-25 19:42:55,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:42:55,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:42:55,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:42:55,994 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:42:55,994 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:42:55,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/loop-simple/deep-nested.c [2021-11-25 19:42:56,072 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/data/3474f861d/9a2e368b7b214c369ccee4e9bf4d8f12/FLAG26ecf482a [2021-11-25 19:42:56,475 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:42:56,476 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/sv-benchmarks/c/loop-simple/deep-nested.c [2021-11-25 19:42:56,490 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/data/3474f861d/9a2e368b7b214c369ccee4e9bf4d8f12/FLAG26ecf482a [2021-11-25 19:42:56,858 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/data/3474f861d/9a2e368b7b214c369ccee4e9bf4d8f12 [2021-11-25 19:42:56,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:42:56,867 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:42:56,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:42:56,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:42:56,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:42:56,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:42:56" (1/1) ... [2021-11-25 19:42:56,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1276cc35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:42:56, skipping insertion in model container [2021-11-25 19:42:56,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:42:56" (1/1) ... [2021-11-25 19:42:56,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:42:56,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:42:57,101 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/sv-benchmarks/c/loop-simple/deep-nested.c[625,638] [2021-11-25 19:42:57,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:42:57,124 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:42:57,152 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/sv-benchmarks/c/loop-simple/deep-nested.c[625,638] [2021-11-25 19:42:57,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:42:57,174 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:42:57,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:42:57 WrapperNode [2021-11-25 19:42:57,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:42:57,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:42:57,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:42:57,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:42:57,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:42:57" (1/1) ... [2021-11-25 19:42:57,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:42:57" (1/1) ... [2021-11-25 19:42:57,217 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2021-11-25 19:42:57,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:42:57,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:42:57,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:42:57,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:42:57,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:42:57" (1/1) ... [2021-11-25 19:42:57,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:42:57" (1/1) ... [2021-11-25 19:42:57,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:42:57" (1/1) ... [2021-11-25 19:42:57,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:42:57" (1/1) ... [2021-11-25 19:42:57,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:42:57" (1/1) ... [2021-11-25 19:42:57,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:42:57" (1/1) ... [2021-11-25 19:42:57,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:42:57" (1/1) ... [2021-11-25 19:42:57,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:42:57,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:42:57,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:42:57,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:42:57,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:42:57" (1/1) ... [2021-11-25 19:42:57,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:42:57,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:42:57,292 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:42:57,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:42:57,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:42:57,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:42:57,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:42:57,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:42:57,418 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:42:57,419 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:42:57,529 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:42:57,560 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:42:57,560 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-25 19:42:57,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:42:57 BoogieIcfgContainer [2021-11-25 19:42:57,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:42:57,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:42:57,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:42:57,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:42:57,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:42:56" (1/3) ... [2021-11-25 19:42:57,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb3c035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:42:57, skipping insertion in model container [2021-11-25 19:42:57,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:42:57" (2/3) ... [2021-11-25 19:42:57,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb3c035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:42:57, skipping insertion in model container [2021-11-25 19:42:57,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:42:57" (3/3) ... [2021-11-25 19:42:57,588 INFO L111 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2021-11-25 19:42:57,595 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:42:57,596 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:42:57,671 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:42:57,678 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 [2021-11-25 19:42:57,684 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:42:57,712 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:42:57,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:57,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:42:57,718 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:42:57,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:57,727 INFO L85 PathProgramCache]: Analyzing trace with hash 879794961, now seen corresponding path program 1 times [2021-11-25 19:42:57,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:57,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479303333] [2021-11-25 19:42:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:57,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:58,068 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:58,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479303333] [2021-11-25 19:42:58,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479303333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:42:58,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:42:58,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:42:58,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119490075] [2021-11-25 19:42:58,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:42:58,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:42:58,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:58,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:42:58,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:42:58,109 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) 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) [2021-11-25 19:42:58,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:58,205 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2021-11-25 19:42:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:42:58,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) 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 [2021-11-25 19:42:58,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:58,217 INFO L225 Difference]: With dead ends: 24 [2021-11-25 19:42:58,217 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 19:42:58,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:42:58,227 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 14 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:58,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:42:58,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 19:42:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-11-25 19:42:58,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2021-11-25 19:42:58,264 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2021-11-25 19:42:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:58,265 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-11-25 19:42:58,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) 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) [2021-11-25 19:42:58,265 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2021-11-25 19:42:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:42:58,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:58,266 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:42:58,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:42:58,267 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:42:58,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:58,268 INFO L85 PathProgramCache]: Analyzing trace with hash 2085127801, now seen corresponding path program 1 times [2021-11-25 19:42:58,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:58,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390181959] [2021-11-25 19:42:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:58,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:42:58,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:58,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390181959] [2021-11-25 19:42:58,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390181959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:42:58,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:42:58,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:42:58,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458646662] [2021-11-25 19:42:58,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:42:58,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:42:58,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:58,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:42:58,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:42:58,544 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-11-25 19:42:58,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:58,610 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2021-11-25 19:42:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:42:58,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 [2021-11-25 19:42:58,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:58,613 INFO L225 Difference]: With dead ends: 23 [2021-11-25 19:42:58,613 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 19:42:58,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:42:58,621 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:58,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:42:58,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 19:42:58,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-11-25 19:42:58,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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) [2021-11-25 19:42:58,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2021-11-25 19:42:58,635 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2021-11-25 19:42:58,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:58,638 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2021-11-25 19:42:58,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-11-25 19:42:58,640 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2021-11-25 19:42:58,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:42:58,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:58,642 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:42:58,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:42:58,643 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:42:58,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:58,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1421280196, now seen corresponding path program 1 times [2021-11-25 19:42:58,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:58,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749070645] [2021-11-25 19:42:58,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:58,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:42:58,927 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:58,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749070645] [2021-11-25 19:42:58,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749070645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:42:58,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608848865] [2021-11-25 19:42:58,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:58,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:58,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:42:58,935 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:42:58,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:42:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:58,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:42:58,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:42:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:42:59,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:42:59,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608848865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:42:59,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:42:59,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-25 19:42:59,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365484630] [2021-11-25 19:42:59,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:42:59,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:42:59,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:59,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:42:59,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:42:59,117 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-11-25 19:42:59,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:59,201 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2021-11-25 19:42:59,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:42:59,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 [2021-11-25 19:42:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:59,203 INFO L225 Difference]: With dead ends: 48 [2021-11-25 19:42:59,203 INFO L226 Difference]: Without dead ends: 37 [2021-11-25 19:42:59,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:42:59,208 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 36 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:59,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 6 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:42:59,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-25 19:42:59,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2021-11-25 19:42:59,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:59,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2021-11-25 19:42:59,224 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2021-11-25 19:42:59,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:59,224 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2021-11-25 19:42:59,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-11-25 19:42:59,224 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2021-11-25 19:42:59,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:42:59,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:59,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:42:59,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:42:59,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:59,441 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:42:59,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:59,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1913796903, now seen corresponding path program 1 times [2021-11-25 19:42:59,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:59,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987552286] [2021-11-25 19:42:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:59,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:42:59,649 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:59,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987552286] [2021-11-25 19:42:59,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987552286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:42:59,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685452692] [2021-11-25 19:42:59,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:59,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:59,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:42:59,655 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:42:59,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:42:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:59,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:42:59,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:42:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:42:59,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:42:59,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685452692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:42:59,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:42:59,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-25 19:42:59,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879717276] [2021-11-25 19:42:59,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:42:59,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:42:59,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:59,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:42:59,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:42:59,775 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-11-25 19:42:59,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:59,871 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2021-11-25 19:42:59,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:42:59,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 15 [2021-11-25 19:42:59,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:59,874 INFO L225 Difference]: With dead ends: 56 [2021-11-25 19:42:59,874 INFO L226 Difference]: Without dead ends: 37 [2021-11-25 19:42:59,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:42:59,881 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 66 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:59,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 6 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:42:59,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-25 19:42:59,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-11-25 19:42:59,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 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) [2021-11-25 19:42:59,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2021-11-25 19:42:59,889 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 15 [2021-11-25 19:42:59,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:59,890 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2021-11-25 19:42:59,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-11-25 19:42:59,890 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2021-11-25 19:42:59,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 19:42:59,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:59,891 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:42:59,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:43:00,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:00,113 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:00,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:00,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1798734434, now seen corresponding path program 1 times [2021-11-25 19:43:00,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:00,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648576532] [2021-11-25 19:43:00,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:00,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:43:00,254 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:00,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648576532] [2021-11-25 19:43:00,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648576532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:43:00,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429613342] [2021-11-25 19:43:00,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:00,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:00,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:43:00,256 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:43:00,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:43:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:00,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:43:00,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:43:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:43:00,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:43:00,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429613342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:43:00,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:43:00,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-25 19:43:00,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268320168] [2021-11-25 19:43:00,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:43:00,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:43:00,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:00,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:43:00,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:43:00,373 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:43:00,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:00,460 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2021-11-25 19:43:00,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:43:00,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-25 19:43:00,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:00,462 INFO L225 Difference]: With dead ends: 58 [2021-11-25 19:43:00,462 INFO L226 Difference]: Without dead ends: 37 [2021-11-25 19:43:00,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:43:00,464 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 44 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:00,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 6 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:43:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-25 19:43:00,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2021-11-25 19:43:00,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 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) [2021-11-25 19:43:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2021-11-25 19:43:00,472 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 17 [2021-11-25 19:43:00,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:00,473 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2021-11-25 19:43:00,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:43:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2021-11-25 19:43:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 19:43:00,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:00,474 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:43:00,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:43:00,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:00,692 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:00,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:00,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1475056415, now seen corresponding path program 1 times [2021-11-25 19:43:00,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:00,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714388189] [2021-11-25 19:43:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:00,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:43:00,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:00,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714388189] [2021-11-25 19:43:00,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714388189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:43:00,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412446195] [2021-11-25 19:43:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:00,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:00,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:43:00,870 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:43:00,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:43:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:00,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:43:00,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:43:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 19:43:01,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:43:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 19:43:01,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412446195] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:43:01,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2144261500] [2021-11-25 19:43:01,237 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:43:01,238 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:43:01,242 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:43:01,247 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:43:01,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:43:03,730 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:43:04,397 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '826#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (<= |#NULL.base| 0) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 19:43:04,397 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:43:04,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:43:04,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2021-11-25 19:43:04,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182160923] [2021-11-25 19:43:04,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:43:04,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 19:43:04,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:04,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 19:43:04,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:43:04,400 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 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) [2021-11-25 19:43:06,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:06,189 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2021-11-25 19:43:06,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-25 19:43:06,190 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 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 22 [2021-11-25 19:43:06,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:06,191 INFO L225 Difference]: With dead ends: 134 [2021-11-25 19:43:06,192 INFO L226 Difference]: Without dead ends: 90 [2021-11-25 19:43:06,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=472, Invalid=1978, Unknown=0, NotChecked=0, Total=2450 [2021-11-25 19:43:06,194 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 319 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:06,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 5 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:43:06,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-25 19:43:06,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 57. [2021-11-25 19:43:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 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) [2021-11-25 19:43:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2021-11-25 19:43:06,208 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 22 [2021-11-25 19:43:06,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:06,208 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2021-11-25 19:43:06,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 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) [2021-11-25 19:43:06,209 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2021-11-25 19:43:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 19:43:06,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:06,210 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-25 19:43:06,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:43:06,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:43:06,426 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:06,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:06,427 INFO L85 PathProgramCache]: Analyzing trace with hash 868760348, now seen corresponding path program 2 times [2021-11-25 19:43:06,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:06,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264755768] [2021-11-25 19:43:06,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:06,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-25 19:43:06,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:06,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264755768] [2021-11-25 19:43:06,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264755768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:43:06,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233255796] [2021-11-25 19:43:06,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:43:06,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:06,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:43:06,650 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:43:06,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:43:06,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-25 19:43:06,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:43:06,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:43:06,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:43:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-25 19:43:06,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:43:06,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233255796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:43:06,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:43:06,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-25 19:43:06,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448640646] [2021-11-25 19:43:06,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:43:06,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:43:06,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:06,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:43:06,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:43:06,844 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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) [2021-11-25 19:43:06,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:06,892 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2021-11-25 19:43:06,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:43:06,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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) Word has length 40 [2021-11-25 19:43:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:06,894 INFO L225 Difference]: With dead ends: 97 [2021-11-25 19:43:06,894 INFO L226 Difference]: Without dead ends: 95 [2021-11-25 19:43:06,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:43:06,895 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:06,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 4 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:43:06,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-25 19:43:06,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2021-11-25 19:43:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 74 states have internal predecessors, (94), 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) [2021-11-25 19:43:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2021-11-25 19:43:06,912 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 40 [2021-11-25 19:43:06,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:06,913 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2021-11-25 19:43:06,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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) [2021-11-25 19:43:06,913 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2021-11-25 19:43:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 19:43:06,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:06,915 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-11-25 19:43:06,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:43:07,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:07,130 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:07,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:07,131 INFO L85 PathProgramCache]: Analyzing trace with hash -208931846, now seen corresponding path program 3 times [2021-11-25 19:43:07,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:07,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069557056] [2021-11-25 19:43:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:07,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 15 proven. 64 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-25 19:43:07,325 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:07,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069557056] [2021-11-25 19:43:07,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069557056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:43:07,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996886773] [2021-11-25 19:43:07,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:43:07,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:07,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:43:07,334 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:43:07,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:43:07,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:43:07,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:43:07,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:43:07,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:43:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 98 proven. 20 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-25 19:43:07,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:43:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 91 proven. 27 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-25 19:43:07,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996886773] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:43:07,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1286764130] [2021-11-25 19:43:07,800 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:43:07,800 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:43:07,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:43:07,801 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:43:07,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:43:09,276 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:43:10,042 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1921#(and (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~e~0#1|) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:43:10,042 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:43:10,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:43:10,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2021-11-25 19:43:10,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118274085] [2021-11-25 19:43:10,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:43:10,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 19:43:10,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:10,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 19:43:10,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:43:10,045 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 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) [2021-11-25 19:43:10,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:10,637 INFO L93 Difference]: Finished difference Result 223 states and 301 transitions. [2021-11-25 19:43:10,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:43:10,637 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 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 50 [2021-11-25 19:43:10,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:10,638 INFO L225 Difference]: With dead ends: 223 [2021-11-25 19:43:10,638 INFO L226 Difference]: Without dead ends: 122 [2021-11-25 19:43:10,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 123 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 19:43:10,641 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 83 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:10,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 10 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:43:10,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-25 19:43:10,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2021-11-25 19:43:10,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 110 states have internal predecessors, (130), 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) [2021-11-25 19:43:10,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2021-11-25 19:43:10,661 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 50 [2021-11-25 19:43:10,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:10,662 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2021-11-25 19:43:10,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 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) [2021-11-25 19:43:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2021-11-25 19:43:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 19:43:10,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:10,665 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-11-25 19:43:10,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:43:10,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:10,878 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:10,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:10,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1423124666, now seen corresponding path program 4 times [2021-11-25 19:43:10,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:10,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098218988] [2021-11-25 19:43:10,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:10,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 15 proven. 209 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-25 19:43:11,217 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:11,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098218988] [2021-11-25 19:43:11,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098218988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:43:11,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816865619] [2021-11-25 19:43:11,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:43:11,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:11,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:43:11,222 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:43:11,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:43:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:11,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:43:11,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:43:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 262 proven. 87 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-25 19:43:11,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:43:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 260 proven. 89 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-25 19:43:11,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816865619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:43:11,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1329509485] [2021-11-25 19:43:11,936 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:43:11,936 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:43:11,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:43:11,937 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:43:11,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:43:13,309 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:43:14,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2932#(and (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~e~0#1|) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:43:14,082 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:43:14,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:43:14,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-11-25 19:43:14,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410637772] [2021-11-25 19:43:14,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:43:14,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 19:43:14,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:14,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 19:43:14,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-11-25 19:43:14,085 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 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) [2021-11-25 19:43:19,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:19,694 INFO L93 Difference]: Finished difference Result 644 states and 814 transitions. [2021-11-25 19:43:19,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-25 19:43:19,694 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 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 74 [2021-11-25 19:43:19,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:19,698 INFO L225 Difference]: With dead ends: 644 [2021-11-25 19:43:19,698 INFO L226 Difference]: Without dead ends: 537 [2021-11-25 19:43:19,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 191 SyntacticMatches, 11 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2511 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1145, Invalid=6337, Unknown=0, NotChecked=0, Total=7482 [2021-11-25 19:43:19,704 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 527 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:19,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 16 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 19:43:19,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-25 19:43:19,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 335. [2021-11-25 19:43:19,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.122754491017964) internal successors, (375), 334 states have internal predecessors, (375), 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) [2021-11-25 19:43:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 375 transitions. [2021-11-25 19:43:19,756 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 375 transitions. Word has length 74 [2021-11-25 19:43:19,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:19,757 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 375 transitions. [2021-11-25 19:43:19,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 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) [2021-11-25 19:43:19,757 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 375 transitions. [2021-11-25 19:43:19,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-11-25 19:43:19,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:19,766 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 84, 13, 13, 12, 12, 12, 11, 2, 1, 1, 1, 1] [2021-11-25 19:43:19,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-25 19:43:19,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:19,979 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:19,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:19,979 INFO L85 PathProgramCache]: Analyzing trace with hash 32824799, now seen corresponding path program 5 times [2021-11-25 19:43:19,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:19,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104821617] [2021-11-25 19:43:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:19,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12367 backedges. 60 proven. 1944 refuted. 0 times theorem prover too weak. 10363 trivial. 0 not checked. [2021-11-25 19:43:20,895 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:20,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104821617] [2021-11-25 19:43:20,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104821617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:43:20,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4049494] [2021-11-25 19:43:20,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:43:20,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:20,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:43:20,897 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:43:20,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:43:20,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-25 19:43:20,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:43:20,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:43:20,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:43:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12367 backedges. 1668 proven. 0 refuted. 0 times theorem prover too weak. 10699 trivial. 0 not checked. [2021-11-25 19:43:21,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:43:21,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4049494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:43:21,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:43:21,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 14 [2021-11-25 19:43:21,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080073338] [2021-11-25 19:43:21,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:43:21,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:43:21,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:21,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:43:21,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:43:21,675 INFO L87 Difference]: Start difference. First operand 335 states and 375 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:43:21,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:21,770 INFO L93 Difference]: Finished difference Result 603 states and 656 transitions. [2021-11-25 19:43:21,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:43:21,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 332 [2021-11-25 19:43:21,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:21,780 INFO L225 Difference]: With dead ends: 603 [2021-11-25 19:43:21,781 INFO L226 Difference]: Without dead ends: 601 [2021-11-25 19:43:21,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:43:21,782 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:21,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:43:21,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-25 19:43:21,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 354. [2021-11-25 19:43:21,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.1189801699716715) internal successors, (395), 353 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) [2021-11-25 19:43:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 395 transitions. [2021-11-25 19:43:21,842 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 395 transitions. Word has length 332 [2021-11-25 19:43:21,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:21,844 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 395 transitions. [2021-11-25 19:43:21,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:43:21,844 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 395 transitions. [2021-11-25 19:43:21,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-11-25 19:43:21,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:21,852 INFO L514 BasicCegarLoop]: trace histogram [91, 90, 90, 14, 13, 13, 12, 12, 11, 2, 1, 1, 1, 1] [2021-11-25 19:43:21,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:43:22,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:22,074 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:22,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:22,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2045133972, now seen corresponding path program 6 times [2021-11-25 19:43:22,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:22,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666148360] [2021-11-25 19:43:22,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:22,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 14136 backedges. 61 proven. 2090 refuted. 0 times theorem prover too weak. 11985 trivial. 0 not checked. [2021-11-25 19:43:23,068 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:23,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666148360] [2021-11-25 19:43:23,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666148360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:43:23,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143372161] [2021-11-25 19:43:23,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:43:23,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:23,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:43:23,073 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:43:23,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:43:23,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:43:23,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:43:23,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:43:23,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:43:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 14136 backedges. 2043 proven. 26 refuted. 0 times theorem prover too weak. 12067 trivial. 0 not checked. [2021-11-25 19:43:23,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:43:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 14136 backedges. 2042 proven. 27 refuted. 0 times theorem prover too weak. 12067 trivial. 0 not checked. [2021-11-25 19:43:24,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143372161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:43:24,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1122644458] [2021-11-25 19:43:24,684 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:43:24,686 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:43:24,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:43:24,687 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:43:24,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:43:26,305 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:43:26,834 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9037#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (<= |#NULL.base| 0) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 19:43:26,847 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:43:26,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:43:26,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 23 [2021-11-25 19:43:26,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263124921] [2021-11-25 19:43:26,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:43:26,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 19:43:26,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:26,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 19:43:26,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-11-25 19:43:26,851 INFO L87 Difference]: Start difference. First operand 354 states and 395 transitions. Second operand has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 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) [2021-11-25 19:43:30,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:30,658 INFO L93 Difference]: Finished difference Result 2152 states and 2555 transitions. [2021-11-25 19:43:30,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-25 19:43:30,658 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 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 352 [2021-11-25 19:43:30,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:30,668 INFO L225 Difference]: With dead ends: 2152 [2021-11-25 19:43:30,668 INFO L226 Difference]: Without dead ends: 1802 [2021-11-25 19:43:30,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1116 GetRequests, 1040 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=926, Invalid=5080, Unknown=0, NotChecked=0, Total=6006 [2021-11-25 19:43:30,672 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 436 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:30,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 13 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 19:43:30,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-11-25 19:43:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1548. [2021-11-25 19:43:30,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1547 states have (on average 1.0723981900452488) internal successors, (1659), 1547 states have internal predecessors, (1659), 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) [2021-11-25 19:43:30,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 1659 transitions. [2021-11-25 19:43:30,838 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 1659 transitions. Word has length 352 [2021-11-25 19:43:30,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:30,839 INFO L470 AbstractCegarLoop]: Abstraction has 1548 states and 1659 transitions. [2021-11-25 19:43:30,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 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) [2021-11-25 19:43:30,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 1659 transitions. [2021-11-25 19:43:30,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1546 [2021-11-25 19:43:30,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:30,940 INFO L514 BasicCegarLoop]: trace histogram [442, 441, 441, 49, 48, 48, 47, 12, 11, 2, 1, 1, 1, 1] [2021-11-25 19:43:30,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:43:31,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:31,140 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:31,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:31,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1388442638, now seen corresponding path program 7 times [2021-11-25 19:43:31,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:31,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871467118] [2021-11-25 19:43:31,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:31,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 320636 backedges. 166 proven. 13134 refuted. 0 times theorem prover too weak. 307336 trivial. 0 not checked. [2021-11-25 19:43:37,411 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:37,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871467118] [2021-11-25 19:43:37,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871467118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:43:37,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914569353] [2021-11-25 19:43:37,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:43:37,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:37,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:43:37,414 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:43:37,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:43:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:37,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 2459 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:43:37,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:43:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 320636 backedges. 160667 proven. 6120 refuted. 0 times theorem prover too weak. 153849 trivial. 0 not checked. [2021-11-25 19:43:42,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:43:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 320636 backedges. 160632 proven. 6155 refuted. 0 times theorem prover too weak. 153849 trivial. 0 not checked. [2021-11-25 19:43:44,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914569353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:43:44,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1255685383] [2021-11-25 19:43:44,784 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:43:44,785 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:43:44,785 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:43:44,785 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:43:44,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:43:46,366 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:43:46,995 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23738#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (<= |#NULL.base| 0) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 19:43:46,995 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:43:46,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:43:46,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 24 [2021-11-25 19:43:46,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18116475] [2021-11-25 19:43:46,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:43:46,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 19:43:46,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:47,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 19:43:47,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:43:47,001 INFO L87 Difference]: Start difference. First operand 1548 states and 1659 transitions. Second operand has 25 states, 25 states have (on average 3.96) internal successors, (99), 24 states have internal predecessors, (99), 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) [2021-11-25 19:43:54,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:54,663 INFO L93 Difference]: Finished difference Result 7643 states and 8366 transitions. [2021-11-25 19:43:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-25 19:43:54,663 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 24 states have internal predecessors, (99), 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 1545 [2021-11-25 19:43:54,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:54,690 INFO L225 Difference]: With dead ends: 7643 [2021-11-25 19:43:54,690 INFO L226 Difference]: Without dead ends: 5849 [2021-11-25 19:43:54,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4736 GetRequests, 4619 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4489 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1520, Invalid=12522, Unknown=0, NotChecked=0, Total=14042 [2021-11-25 19:43:54,699 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 719 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 1779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:54,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 15 Invalid, 1779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 1412 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-25 19:43:54,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5849 states. [2021-11-25 19:43:55,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5849 to 4025. [2021-11-25 19:43:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4025 states, 4024 states have (on average 1.05889662027833) internal successors, (4261), 4024 states have internal predecessors, (4261), 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) [2021-11-25 19:43:55,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4025 states to 4025 states and 4261 transitions. [2021-11-25 19:43:55,237 INFO L78 Accepts]: Start accepts. Automaton has 4025 states and 4261 transitions. Word has length 1545 [2021-11-25 19:43:55,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:55,238 INFO L470 AbstractCegarLoop]: Abstraction has 4025 states and 4261 transitions. [2021-11-25 19:43:55,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 24 states have internal predecessors, (99), 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) [2021-11-25 19:43:55,238 INFO L276 IsEmpty]: Start isEmpty. Operand 4025 states and 4261 transitions. [2021-11-25 19:43:55,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2461 [2021-11-25 19:43:55,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:55,312 INFO L514 BasicCegarLoop]: trace histogram [731, 730, 730, 73, 72, 48, 47, 12, 11, 2, 1, 1, 1, 1] [2021-11-25 19:43:55,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:43:55,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:55,513 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:55,513 INFO L85 PathProgramCache]: Analyzing trace with hash -266246412, now seen corresponding path program 8 times [2021-11-25 19:43:55,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:55,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510184647] [2021-11-25 19:43:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:55,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 863833 backedges. 190 proven. 23987 refuted. 0 times theorem prover too weak. 839656 trivial. 0 not checked. [2021-11-25 19:44:05,495 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:05,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510184647] [2021-11-25 19:44:05,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510184647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:44:05,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507075898] [2021-11-25 19:44:05,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:44:05,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:44:05,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:44:05,498 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:44:05,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:44:05,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 19:44:05,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:44:05,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:44:05,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:44:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 863833 backedges. 46528 proven. 332 refuted. 0 times theorem prover too weak. 816973 trivial. 0 not checked. [2021-11-25 19:44:10,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:44:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 863833 backedges. 0 proven. 46860 refuted. 0 times theorem prover too weak. 816973 trivial. 0 not checked. [2021-11-25 19:44:16,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507075898] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:44:16,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2005735659] [2021-11-25 19:44:16,083 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:44:16,083 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:44:16,084 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:44:16,084 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:44:16,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:44:17,708 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:44:18,323 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55043#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (<= |#NULL.base| 0) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 19:44:18,323 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:44:18,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:44:18,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 4, 4] total 21 [2021-11-25 19:44:18,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876998824] [2021-11-25 19:44:18,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:44:18,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 19:44:18,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:44:18,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 19:44:18,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:44:18,330 INFO L87 Difference]: Start difference. First operand 4025 states and 4261 transitions. Second operand has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 21 states have internal predecessors, (96), 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) [2021-11-25 19:44:22,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:44:22,146 INFO L93 Difference]: Finished difference Result 13668 states and 14816 transitions. [2021-11-25 19:44:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-25 19:44:22,147 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 21 states have internal predecessors, (96), 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 2460 [2021-11-25 19:44:22,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:44:22,185 INFO L225 Difference]: With dead ends: 13668 [2021-11-25 19:44:22,185 INFO L226 Difference]: Without dead ends: 9679 [2021-11-25 19:44:22,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7457 GetRequests, 7368 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2358 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1250, Invalid=6940, Unknown=0, NotChecked=0, Total=8190 [2021-11-25 19:44:22,195 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 392 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:44:22,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 14 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 19:44:22,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9679 states. [2021-11-25 19:44:22,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9679 to 3889. [2021-11-25 19:44:22,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3889 states, 3888 states have (on average 1.0421810699588476) internal successors, (4052), 3888 states have internal predecessors, (4052), 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) [2021-11-25 19:44:22,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3889 states to 3889 states and 4052 transitions. [2021-11-25 19:44:22,750 INFO L78 Accepts]: Start accepts. Automaton has 3889 states and 4052 transitions. Word has length 2460 [2021-11-25 19:44:22,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:44:22,751 INFO L470 AbstractCegarLoop]: Abstraction has 3889 states and 4052 transitions. [2021-11-25 19:44:22,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 21 states have internal predecessors, (96), 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) [2021-11-25 19:44:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3889 states and 4052 transitions. [2021-11-25 19:44:22,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3887 [2021-11-25 19:44:22,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:44:22,909 INFO L514 BasicCegarLoop]: trace histogram [1189, 1188, 1188, 99, 98, 48, 47, 12, 11, 2, 1, 1, 1, 1] [2021-11-25 19:44:22,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:44:23,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 19:44:23,134 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:44:23,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:44:23,135 INFO L85 PathProgramCache]: Analyzing trace with hash 253347158, now seen corresponding path program 9 times [2021-11-25 19:44:23,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:44:23,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940261542] [2021-11-25 19:44:23,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:23,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2251260 backedges. 216 proven. 46184 refuted. 0 times theorem prover too weak. 2204860 trivial. 0 not checked. [2021-11-25 19:44:43,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:43,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940261542] [2021-11-25 19:44:43,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940261542] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:44:43,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802241592] [2021-11-25 19:44:43,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:44:43,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:44:43,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:44:43,223 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:44:43,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:44:44,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:44:44,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:44:44,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 5747 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:44:44,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:44:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2251260 backedges. 1127663 proven. 46567 refuted. 0 times theorem prover too weak. 1077030 trivial. 0 not checked. [2021-11-25 19:44:51,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:45:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2251260 backedges. 1123313 proven. 50917 refuted. 0 times theorem prover too weak. 1077030 trivial. 0 not checked. [2021-11-25 19:45:02,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802241592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:45:02,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [40004855] [2021-11-25 19:45:02,948 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:45:02,948 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:45:02,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:45:02,949 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:45:02,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:45:04,212 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:45:10,866 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '102623#(and (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~e~0#1|) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:45:10,867 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:45:10,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:45:10,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 31 [2021-11-25 19:45:10,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118485774] [2021-11-25 19:45:10,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:45:10,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 19:45:10,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:45:10,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 19:45:10,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 19:45:10,876 INFO L87 Difference]: Start difference. First operand 3889 states and 4052 transitions. Second operand has 31 states, 31 states have (on average 3.870967741935484) internal successors, (120), 31 states have internal predecessors, (120), 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) [2021-11-25 19:45:15,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:45:15,931 INFO L93 Difference]: Finished difference Result 12552 states and 13351 transitions. [2021-11-25 19:45:15,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-25 19:45:15,931 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.870967741935484) internal successors, (120), 31 states have internal predecessors, (120), 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 3886 [2021-11-25 19:45:15,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:45:15,971 INFO L225 Difference]: With dead ends: 12552 [2021-11-25 19:45:15,971 INFO L226 Difference]: Without dead ends: 8378 [2021-11-25 19:45:15,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11739 GetRequests, 11481 SyntacticMatches, 159 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5214 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=847, Invalid=9253, Unknown=0, NotChecked=0, Total=10100 [2021-11-25 19:45:15,983 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 515 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2496 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 2756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 2496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:45:15,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 11 Invalid, 2756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 2496 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 19:45:15,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8378 states. [2021-11-25 19:45:16,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8378 to 6113. [2021-11-25 19:45:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6113 states, 6112 states have (on average 1.0343586387434556) internal successors, (6322), 6112 states have internal predecessors, (6322), 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) [2021-11-25 19:45:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6113 states to 6113 states and 6322 transitions. [2021-11-25 19:45:16,611 INFO L78 Accepts]: Start accepts. Automaton has 6113 states and 6322 transitions. Word has length 3886 [2021-11-25 19:45:16,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:45:16,612 INFO L470 AbstractCegarLoop]: Abstraction has 6113 states and 6322 transitions. [2021-11-25 19:45:16,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.870967741935484) internal successors, (120), 31 states have internal predecessors, (120), 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) [2021-11-25 19:45:16,613 INFO L276 IsEmpty]: Start isEmpty. Operand 6113 states and 6322 transitions. [2021-11-25 19:45:16,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6111 [2021-11-25 19:45:16,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:45:16,831 INFO L514 BasicCegarLoop]: trace histogram [1899, 1898, 1898, 146, 145, 48, 47, 12, 11, 2, 1, 1, 1, 1] [2021-11-25 19:45:16,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:45:17,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:45:17,032 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:45:17,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:45:17,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1462985721, now seen corresponding path program 10 times [2021-11-25 19:45:17,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:45:17,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787978401] [2021-11-25 19:45:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:45:17,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:45:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:46:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5710668 backedges. 263 proven. 79575 refuted. 0 times theorem prover too weak. 5630830 trivial. 0 not checked. [2021-11-25 19:46:00,348 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:46:00,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787978401] [2021-11-25 19:46:00,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787978401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:46:00,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125545813] [2021-11-25 19:46:00,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:46:00,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:46:00,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:46:00,350 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:46:00,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f553fdcb-985d-4297-b9e8-c60e75fa89dd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 19:46:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:46:02,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 8869 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 19:46:02,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:46:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5710668 backedges. 229952 proven. 1720 refuted. 0 times theorem prover too weak. 5478996 trivial. 0 not checked. [2021-11-25 19:46:09,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:46:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5710668 backedges. 229952 proven. 1720 refuted. 0 times theorem prover too weak. 5478996 trivial. 0 not checked. [2021-11-25 19:46:17,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125545813] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:46:17,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1938326229] [2021-11-25 19:46:17,394 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 19:46:17,394 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:46:17,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:46:17,394 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:46:17,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:46:18,395 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:46:27,992 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '165217#(and (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~e~0#1|) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:46:27,992 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:46:27,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:46:27,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 37 [2021-11-25 19:46:27,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523900985] [2021-11-25 19:46:27,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:46:28,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-25 19:46:28,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:46:28,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-25 19:46:28,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1638, Unknown=0, NotChecked=0, Total=1806 [2021-11-25 19:46:28,004 INFO L87 Difference]: Start difference. First operand 6113 states and 6322 transitions. Second operand has 37 states, 37 states have (on average 3.4594594594594597) internal successors, (128), 37 states have internal predecessors, (128), 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) [2021-11-25 19:46:57,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:46:57,701 INFO L93 Difference]: Finished difference Result 26547 states and 28892 transitions. [2021-11-25 19:46:57,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-11-25 19:46:57,702 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.4594594594594597) internal successors, (128), 37 states have internal predecessors, (128), 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 6110 [2021-11-25 19:46:57,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:46:57,741 INFO L225 Difference]: With dead ends: 26547 [2021-11-25 19:46:57,741 INFO L226 Difference]: Without dead ends: 20479 [2021-11-25 19:46:57,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18492 GetRequests, 18100 SyntacticMatches, 206 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16440 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=3760, Invalid=31396, Unknown=0, NotChecked=0, Total=35156 [2021-11-25 19:46:57,759 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 1227 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 4378 mSolverCounterSat, 690 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 5068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 690 IncrementalHoareTripleChecker+Valid, 4378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:46:57,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1227 Valid, 27 Invalid, 5068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [690 Valid, 4378 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-25 19:46:57,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20479 states. [2021-11-25 19:46:59,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20479 to 19328. [2021-11-25 19:46:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19328 states, 19327 states have (on average 1.0231282661561547) internal successors, (19774), 19327 states have internal predecessors, (19774), 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) [2021-11-25 19:46:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19328 states to 19328 states and 19774 transitions. [2021-11-25 19:46:59,961 INFO L78 Accepts]: Start accepts. Automaton has 19328 states and 19774 transitions. Word has length 6110 [2021-11-25 19:46:59,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:46:59,962 INFO L470 AbstractCegarLoop]: Abstraction has 19328 states and 19774 transitions. [2021-11-25 19:46:59,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.4594594594594597) internal successors, (128), 37 states have internal predecessors, (128), 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) [2021-11-25 19:46:59,963 INFO L276 IsEmpty]: Start isEmpty. Operand 19328 states and 19774 transitions.