./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/nested_1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/nested_1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh --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 7d46306d0f449fc697e3921b4f35c60335f25019c8462cefcaf92538159e3d14 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 09:13:55,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:13:55,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:13:55,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:13:55,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:13:55,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:13:55,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:13:55,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:13:55,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:13:55,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:13:55,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:13:55,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:13:55,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:13:55,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:13:55,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:13:55,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:13:55,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:13:55,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:13:55,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:13:55,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:13:55,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:13:55,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:13:55,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:13:55,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:13:55,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:13:55,559 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:13:55,559 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:13:55,560 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:13:55,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:13:55,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:13:55,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:13:55,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:13:55,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:13:55,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:13:55,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:13:55,564 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:13:55,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:13:55,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:13:55,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:13:55,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:13:55,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:13:55,566 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:13:55,586 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:13:55,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:13:55,587 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:13:55,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:13:55,587 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:13:55,587 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:13:55,587 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:13:55,588 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:13:55,588 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:13:55,588 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:13:55,588 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:13:55,588 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:13:55,588 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:13:55,588 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:13:55,589 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:13:55,589 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:13:55,589 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:13:55,589 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:13:55,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:13:55,590 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:13:55,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:13:55,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:13:55,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:13:55,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:13:55,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:13:55,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:13:55,591 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:13:55,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:13:55,591 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:13:55,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:13:55,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:13:55,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:13:55,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:13:55,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:13:55,593 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:13:55,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:13:55,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:13:55,593 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:13:55,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:13:55,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:13:55,593 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:13:55,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d46306d0f449fc697e3921b4f35c60335f25019c8462cefcaf92538159e3d14 [2022-12-14 09:13:55,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:13:55,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:13:55,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:13:55,807 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:13:55,807 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:13:55,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loop-acceleration/nested_1-1.c [2022-12-14 09:13:58,467 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:13:58,624 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:13:58,625 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/sv-benchmarks/c/loop-acceleration/nested_1-1.c [2022-12-14 09:13:58,629 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/data/ba6579692/cca6ed88705b41289b7db4ebc59138ba/FLAGbbdae07dc [2022-12-14 09:13:58,641 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/data/ba6579692/cca6ed88705b41289b7db4ebc59138ba [2022-12-14 09:13:58,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:13:58,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:13:58,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:13:58,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:13:58,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:13:58,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:13:58" (1/1) ... [2022-12-14 09:13:58,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36350afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:58, skipping insertion in model container [2022-12-14 09:13:58,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:13:58" (1/1) ... [2022-12-14 09:13:58,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:13:58,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:13:58,774 WARN L237 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_9836b101-d72d-46e9-a3c7-fe1080dd0c57/sv-benchmarks/c/loop-acceleration/nested_1-1.c[322,335] [2022-12-14 09:13:58,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:13:58,794 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:13:58,804 WARN L237 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_9836b101-d72d-46e9-a3c7-fe1080dd0c57/sv-benchmarks/c/loop-acceleration/nested_1-1.c[322,335] [2022-12-14 09:13:58,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:13:58,815 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:13:58,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:58 WrapperNode [2022-12-14 09:13:58,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:13:58,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:13:58,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:13:58,817 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:13:58,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:58" (1/1) ... [2022-12-14 09:13:58,826 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:58" (1/1) ... [2022-12-14 09:13:58,839 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2022-12-14 09:13:58,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:13:58,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:13:58,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:13:58,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:13:58,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:58" (1/1) ... [2022-12-14 09:13:58,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:58" (1/1) ... [2022-12-14 09:13:58,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:58" (1/1) ... [2022-12-14 09:13:58,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:58" (1/1) ... [2022-12-14 09:13:58,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:58" (1/1) ... [2022-12-14 09:13:58,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:58" (1/1) ... [2022-12-14 09:13:58,853 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:58" (1/1) ... [2022-12-14 09:13:58,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:58" (1/1) ... [2022-12-14 09:13:58,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:13:58,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:13:58,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:13:58,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:13:58,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:58" (1/1) ... [2022-12-14 09:13:58,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:13:58,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:13:58,878 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:13:58,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:13:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:13:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:13:58,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:13:58,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:13:58,971 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:13:58,973 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:13:59,067 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:13:59,093 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:13:59,093 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 09:13:59,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:13:59 BoogieIcfgContainer [2022-12-14 09:13:59,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:13:59,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:13:59,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:13:59,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:13:59,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:13:58" (1/3) ... [2022-12-14 09:13:59,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2b7165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:13:59, skipping insertion in model container [2022-12-14 09:13:59,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:58" (2/3) ... [2022-12-14 09:13:59,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2b7165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:13:59, skipping insertion in model container [2022-12-14 09:13:59,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:13:59" (3/3) ... [2022-12-14 09:13:59,105 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2022-12-14 09:13:59,125 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:13:59,125 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:13:59,169 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:13:59,175 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@62c68873, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:13:59,175 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 09:13:59,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) [2022-12-14 09:13:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 09:13:59,183 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:59,184 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 09:13:59,184 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:13:59,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:59,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2252617, now seen corresponding path program 1 times [2022-12-14 09:13:59,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:59,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793638783] [2022-12-14 09:13:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:59,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:59,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:59,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793638783] [2022-12-14 09:13:59,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793638783] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:13:59,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:13:59,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:13:59,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127589147] [2022-12-14 09:13:59,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:13:59,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:13:59,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:59,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:13:59,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:13:59,397 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:13:59,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:59,426 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2022-12-14 09:13:59,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:13:59,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 09:13:59,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:59,436 INFO L225 Difference]: With dead ends: 15 [2022-12-14 09:13:59,436 INFO L226 Difference]: Without dead ends: 8 [2022-12-14 09:13:59,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:13:59,441 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:59,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:13:59,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-12-14 09:13:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2022-12-14 09:13:59,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 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) [2022-12-14 09:13:59,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2022-12-14 09:13:59,474 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 4 [2022-12-14 09:13:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:59,474 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2022-12-14 09:13:59,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:13:59,475 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2022-12-14 09:13:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:13:59,475 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:59,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:13:59,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:13:59,476 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:13:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:59,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2130164165, now seen corresponding path program 1 times [2022-12-14 09:13:59,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:59,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562614368] [2022-12-14 09:13:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:59,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:59,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:59,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562614368] [2022-12-14 09:13:59,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562614368] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:13:59,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:13:59,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:13:59,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443734775] [2022-12-14 09:13:59,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:13:59,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:13:59,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:59,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:13:59,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:13:59,541 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:13:59,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:59,557 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2022-12-14 09:13:59,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:13:59,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 09:13:59,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:59,559 INFO L225 Difference]: With dead ends: 13 [2022-12-14 09:13:59,559 INFO L226 Difference]: Without dead ends: 8 [2022-12-14 09:13:59,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:13:59,560 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:59,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:13:59,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-12-14 09:13:59,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-12-14 09:13:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2022-12-14 09:13:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-12-14 09:13:59,572 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-12-14 09:13:59,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:59,572 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-12-14 09:13:59,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:13:59,572 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-12-14 09:13:59,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 09:13:59,573 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:59,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:13:59,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:13:59,573 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:13:59,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:59,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1585602295, now seen corresponding path program 1 times [2022-12-14 09:13:59,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:59,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450341727] [2022-12-14 09:13:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:59,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:59,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:59,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450341727] [2022-12-14 09:13:59,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450341727] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:13:59,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447039685] [2022-12-14 09:13:59,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:59,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:13:59,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:13:59,679 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:13:59,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:13:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:59,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:13:59,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:13:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:59,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:13:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:13:59,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447039685] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:13:59,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [543933788] [2022-12-14 09:13:59,823 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 09:13:59,823 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:13:59,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:13:59,830 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:13:59,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:14:00,091 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:14:00,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '124#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) 2147483647) (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) (+ (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) (- 4294967296))) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 268435455)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:14:00,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:14:00,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:14:00,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2022-12-14 09:14:00,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811515780] [2022-12-14 09:14:00,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:14:00,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 09:14:00,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:00,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 09:14:00,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-14 09:14:00,181 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:14:00,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:00,320 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2022-12-14 09:14:00,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 09:14:00,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 09:14:00,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:00,322 INFO L225 Difference]: With dead ends: 27 [2022-12-14 09:14:00,322 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 09:14:00,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-12-14 09:14:00,324 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:00,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 8 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:14:00,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 09:14:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 09:14:00,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:14:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-12-14 09:14:00,330 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 7 [2022-12-14 09:14:00,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:00,331 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-12-14 09:14:00,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:14:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-12-14 09:14:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 09:14:00,331 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:00,332 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1] [2022-12-14 09:14:00,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:14:00,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 09:14:00,533 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:00,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:00,535 INFO L85 PathProgramCache]: Analyzing trace with hash -140644807, now seen corresponding path program 2 times [2022-12-14 09:14:00,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:00,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960837227] [2022-12-14 09:14:00,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:00,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 09:14:00,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:00,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960837227] [2022-12-14 09:14:00,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960837227] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:14:00,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801201320] [2022-12-14 09:14:00,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:14:00,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:00,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:14:00,751 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:14:00,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:14:00,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 09:14:00,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:14:00,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 09:14:00,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:14:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 09:14:00,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:14:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 09:14:00,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801201320] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:14:00,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1338741166] [2022-12-14 09:14:00,871 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 09:14:00,872 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:14:00,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:14:00,872 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:14:00,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:14:01,044 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:14:01,306 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '351#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) 2147483647) (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) (+ (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) (- 4294967296))) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 268435455)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:14:01,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:14:01,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:14:01,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-14 09:14:01,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887921629] [2022-12-14 09:14:01,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:14:01,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 09:14:01,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:01,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 09:14:01,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-14 09:14:01,308 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2022-12-14 09:14:01,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:01,389 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2022-12-14 09:14:01,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:14:01,390 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 20 [2022-12-14 09:14:01,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:01,391 INFO L225 Difference]: With dead ends: 53 [2022-12-14 09:14:01,391 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 09:14:01,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 13 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:14:01,393 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:01,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:14:01,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 09:14:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-12-14 09:14:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 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) [2022-12-14 09:14:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-12-14 09:14:01,404 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 20 [2022-12-14 09:14:01,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:01,404 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-12-14 09:14:01,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2022-12-14 09:14:01,405 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-12-14 09:14:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 09:14:01,405 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:01,405 INFO L195 NwaCegarLoop]: trace histogram [24, 4, 4, 1, 1, 1, 1] [2022-12-14 09:14:01,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:14:01,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:01,606 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:01,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:01,607 INFO L85 PathProgramCache]: Analyzing trace with hash 500624441, now seen corresponding path program 3 times [2022-12-14 09:14:01,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:01,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516442685] [2022-12-14 09:14:01,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:01,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-12-14 09:14:01,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:01,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516442685] [2022-12-14 09:14:01,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516442685] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:14:01,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907886996] [2022-12-14 09:14:01,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:14:01,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:01,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:14:01,822 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:14:01,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:14:01,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:14:01,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:14:01,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 09:14:01,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:14:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 09:14:02,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:14:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 10 proven. 314 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 09:14:02,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907886996] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:14:02,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1227682589] [2022-12-14 09:14:02,325 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 09:14:02,326 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:14:02,326 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:14:02,326 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:14:02,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:14:02,433 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:14:02,621 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '766#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) 2147483647) (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) (+ (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) (- 4294967296))) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 268435455)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:14:02,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:14:02,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:14:02,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 29 [2022-12-14 09:14:02,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433390516] [2022-12-14 09:14:02,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:14:02,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 09:14:02,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:02,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 09:14:02,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2022-12-14 09:14:02,624 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 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) [2022-12-14 09:14:10,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:10,452 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2022-12-14 09:14:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-12-14 09:14:10,453 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-12-14 09:14:10,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:10,455 INFO L225 Difference]: With dead ends: 135 [2022-12-14 09:14:10,456 INFO L226 Difference]: Without dead ends: 107 [2022-12-14 09:14:10,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5253 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2638, Invalid=11168, Unknown=0, NotChecked=0, Total=13806 [2022-12-14 09:14:10,464 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 70 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:10,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 32 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:14:10,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-14 09:14:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-12-14 09:14:10,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2169811320754718) internal successors, (129), 106 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:14:10,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2022-12-14 09:14:10,492 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 36 [2022-12-14 09:14:10,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:10,492 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2022-12-14 09:14:10,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 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) [2022-12-14 09:14:10,493 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2022-12-14 09:14:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 09:14:10,497 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:10,497 INFO L195 NwaCegarLoop]: trace histogram [70, 10, 10, 1, 1, 1, 1] [2022-12-14 09:14:10,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:14:10,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:10,698 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:10,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:10,700 INFO L85 PathProgramCache]: Analyzing trace with hash 198990345, now seen corresponding path program 4 times [2022-12-14 09:14:10,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:10,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496399058] [2022-12-14 09:14:10,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:10,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 586 proven. 28 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2022-12-14 09:14:10,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:10,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496399058] [2022-12-14 09:14:10,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496399058] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:14:10,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087140241] [2022-12-14 09:14:10,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:14:10,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:10,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:14:10,976 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:14:10,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:14:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:11,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 09:14:11,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:14:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 586 proven. 28 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2022-12-14 09:14:11,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:14:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 1375 proven. 1393 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2022-12-14 09:14:11,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087140241] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:14:11,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1607599710] [2022-12-14 09:14:11,596 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 09:14:11,596 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:14:11,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:14:11,596 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:14:11,596 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:14:11,718 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:14:13,691 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2006#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) 2147483647) (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) (+ (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) (- 4294967296))) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 268435455)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:14:13,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:14:13,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:14:13,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 17] total 34 [2022-12-14 09:14:13,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394720411] [2022-12-14 09:14:13,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:14:13,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 09:14:13,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:13,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 09:14:13,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 09:14:13,695 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 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) [2022-12-14 09:14:30,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:30,958 INFO L93 Difference]: Finished difference Result 683 states and 893 transitions. [2022-12-14 09:14:30,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-12-14 09:14:30,959 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 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 94 [2022-12-14 09:14:30,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:30,960 INFO L225 Difference]: With dead ends: 683 [2022-12-14 09:14:30,960 INFO L226 Difference]: Without dead ends: 411 [2022-12-14 09:14:30,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 175 SyntacticMatches, 80 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4814 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=2051, Invalid=10159, Unknown=0, NotChecked=0, Total=12210 [2022-12-14 09:14:30,963 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 81 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:30,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 36 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 09:14:30,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-12-14 09:14:31,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 378. [2022-12-14 09:14:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.206896551724138) internal successors, (455), 377 states have internal predecessors, (455), 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) [2022-12-14 09:14:31,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 455 transitions. [2022-12-14 09:14:31,021 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 455 transitions. Word has length 94 [2022-12-14 09:14:31,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:31,022 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 455 transitions. [2022-12-14 09:14:31,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 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) [2022-12-14 09:14:31,022 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 455 transitions. [2022-12-14 09:14:31,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 09:14:31,026 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:31,026 INFO L195 NwaCegarLoop]: trace histogram [86, 10, 10, 1, 1, 1, 1] [2022-12-14 09:14:31,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:14:31,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:31,228 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:31,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:31,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1619921121, now seen corresponding path program 5 times [2022-12-14 09:14:31,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:31,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702876577] [2022-12-14 09:14:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:31,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4615 backedges. 2593 proven. 36 refuted. 0 times theorem prover too weak. 1986 trivial. 0 not checked. [2022-12-14 09:14:31,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:31,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702876577] [2022-12-14 09:14:31,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702876577] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:14:31,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551713142] [2022-12-14 09:14:31,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:14:31,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:31,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:14:31,542 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:14:31,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:14:31,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 09:14:31,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:14:31,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 09:14:31,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:14:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4615 backedges. 712 proven. 846 refuted. 0 times theorem prover too weak. 3057 trivial. 0 not checked. [2022-12-14 09:14:31,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:14:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4615 backedges. 793 proven. 36 refuted. 0 times theorem prover too weak. 3786 trivial. 0 not checked. [2022-12-14 09:14:31,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551713142] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:14:31,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1054729747] [2022-12-14 09:14:31,876 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 09:14:31,876 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:14:31,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:14:31,876 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:14:31,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:14:32,001 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:14:33,566 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4937#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) 2147483647) (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) (+ (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) (- 4294967296))) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 268435455)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:14:33,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:14:33,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:14:33,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-12-14 09:14:33,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582080372] [2022-12-14 09:14:33,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:14:33,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 09:14:33,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:33,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 09:14:33,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:14:33,567 INFO L87 Difference]: Start difference. First operand 378 states and 455 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:14:33,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:33,637 INFO L93 Difference]: Finished difference Result 381 states and 457 transitions. [2022-12-14 09:14:33,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 09:14:33,637 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-12-14 09:14:33,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:33,638 INFO L225 Difference]: With dead ends: 381 [2022-12-14 09:14:33,638 INFO L226 Difference]: Without dead ends: 125 [2022-12-14 09:14:33,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 219 SyntacticMatches, 98 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:14:33,639 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:33,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:14:33,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-14 09:14:33,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-12-14 09:14:33,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0887096774193548) internal successors, (135), 124 states have internal predecessors, (135), 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) [2022-12-14 09:14:33,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2022-12-14 09:14:33,652 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 110 [2022-12-14 09:14:33,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:33,652 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2022-12-14 09:14:33,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:14:33,652 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2022-12-14 09:14:33,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 09:14:33,653 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:33,653 INFO L195 NwaCegarLoop]: trace histogram [100, 10, 10, 1, 1, 1, 1] [2022-12-14 09:14:33,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:14:33,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 09:14:33,854 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:33,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:33,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1113288353, now seen corresponding path program 6 times [2022-12-14 09:14:33,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:33,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192017149] [2022-12-14 09:14:33,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:33,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-12-14 09:14:34,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:34,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192017149] [2022-12-14 09:14:34,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192017149] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:14:34,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927027845] [2022-12-14 09:14:34,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:14:34,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:34,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:14:34,282 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:14:34,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:14:34,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:14:34,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:14:34,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 09:14:34,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:14:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5555 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-12-14 09:14:34,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:14:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-12-14 09:14:35,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927027845] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:14:35,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1251443178] [2022-12-14 09:14:35,075 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 09:14:35,075 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:14:35,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:14:35,075 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:14:35,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:14:35,160 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:14:35,316 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6714#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) 2147483647) (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) (+ (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) (- 4294967296))) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 268435455)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:14:35,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:14:35,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:14:35,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22, 12] total 34 [2022-12-14 09:14:35,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318077919] [2022-12-14 09:14:35,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:14:35,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 09:14:35,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:35,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 09:14:35,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 09:14:35,318 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 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) [2022-12-14 09:14:41,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:41,305 INFO L93 Difference]: Finished difference Result 808 states and 899 transitions. [2022-12-14 09:14:41,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 09:14:41,308 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 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 124 [2022-12-14 09:14:41,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:41,310 INFO L225 Difference]: With dead ends: 808 [2022-12-14 09:14:41,310 INFO L226 Difference]: Without dead ends: 805 [2022-12-14 09:14:41,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 345 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=699, Invalid=1557, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 09:14:41,311 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:41,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 147 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:14:41,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-12-14 09:14:41,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 269. [2022-12-14 09:14:41,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.085820895522388) internal successors, (291), 268 states have internal predecessors, (291), 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) [2022-12-14 09:14:41,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 291 transitions. [2022-12-14 09:14:41,355 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 291 transitions. Word has length 124 [2022-12-14 09:14:41,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:41,355 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 291 transitions. [2022-12-14 09:14:41,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 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) [2022-12-14 09:14:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 291 transitions. [2022-12-14 09:14:41,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-12-14 09:14:41,357 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:41,358 INFO L195 NwaCegarLoop]: trace histogram [220, 22, 22, 1, 1, 1, 1] [2022-12-14 09:14:41,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:14:41,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 09:14:41,559 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:41,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:41,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1876164465, now seen corresponding path program 7 times [2022-12-14 09:14:41,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:41,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903685534] [2022-12-14 09:14:41,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:41,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2022-12-14 09:14:42,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:42,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903685534] [2022-12-14 09:14:42,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903685534] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:14:42,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003913710] [2022-12-14 09:14:42,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:14:42,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:42,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:14:42,779 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:14:42,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:14:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:42,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 09:14:42,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:14:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2022-12-14 09:14:43,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:14:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2022-12-14 09:14:44,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003913710] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:14:44,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1543070862] [2022-12-14 09:14:44,575 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 09:14:44,575 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:14:44,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:14:44,575 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:14:44,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:14:44,682 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:14:52,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10531#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) 2147483647) (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) (+ (mod (mod |ULTIMATE.start_main_~x~0#1| 2) 4294967296) (- 4294967296))) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 268435455)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:14:52,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:14:52,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:14:52,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-12-14 09:14:52,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31403521] [2022-12-14 09:14:52,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:14:52,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 09:14:52,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:52,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 09:14:52,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=1973, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 09:14:52,522 INFO L87 Difference]: Start difference. First operand 269 states and 291 transitions. Second operand has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 48 states have internal predecessors, (140), 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) [2022-12-14 09:15:05,450 WARN L233 SmtUtils]: Spent 7.90s on a formula simplification. DAG size of input: 94 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:15:36,075 WARN L233 SmtUtils]: Spent 5.69s on a formula simplification. DAG size of input: 82 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:17:17,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:17:17,443 INFO L93 Difference]: Finished difference Result 1552 states and 1727 transitions. [2022-12-14 09:17:17,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 09:17:17,443 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 48 states have internal predecessors, (140), 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 268 [2022-12-14 09:17:17,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:17:17,448 INFO L225 Difference]: With dead ends: 1552 [2022-12-14 09:17:17,448 INFO L226 Difference]: Without dead ends: 1549 [2022-12-14 09:17:17,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 848 GetRequests, 533 SyntacticMatches, 243 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6477 ImplicationChecksByTransitivity, 153.2s TimeCoverageRelationStatistics Valid=1756, Invalid=3645, Unknown=1, NotChecked=0, Total=5402 [2022-12-14 09:17:17,450 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 50 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:17:17,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 603 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:17:17,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2022-12-14 09:17:17,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 557. [2022-12-14 09:17:17,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 1.0845323741007193) internal successors, (603), 556 states have internal predecessors, (603), 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) [2022-12-14 09:17:17,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 603 transitions. [2022-12-14 09:17:17,566 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 603 transitions. Word has length 268 [2022-12-14 09:17:17,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:17:17,567 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 603 transitions. [2022-12-14 09:17:17,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 48 states have internal predecessors, (140), 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) [2022-12-14 09:17:17,567 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 603 transitions. [2022-12-14 09:17:17,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2022-12-14 09:17:17,575 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:17:17,575 INFO L195 NwaCegarLoop]: trace histogram [460, 46, 46, 1, 1, 1, 1] [2022-12-14 09:17:17,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 09:17:17,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:17:17,776 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:17:17,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:17:17,778 INFO L85 PathProgramCache]: Analyzing trace with hash 320553233, now seen corresponding path program 8 times [2022-12-14 09:17:17,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:17:17,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723487639] [2022-12-14 09:17:17,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:17:17,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:17:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:17:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2022-12-14 09:17:21,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:17:21,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723487639] [2022-12-14 09:17:21,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723487639] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:17:21,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998856537] [2022-12-14 09:17:21,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:17:21,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:17:21,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:17:21,122 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:17:21,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 09:17:21,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-14 09:17:21,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:17:21,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 09:17:21,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:17:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 5491 proven. 0 refuted. 0 times theorem prover too weak. 123355 trivial. 0 not checked. [2022-12-14 09:17:21,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:17:21,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998856537] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:17:21,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:17:21,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [48] total 52 [2022-12-14 09:17:21,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717135153] [2022-12-14 09:17:21,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:17:21,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:17:21,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:17:21,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:17:21,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2413, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 09:17:21,600 INFO L87 Difference]: Start difference. First operand 557 states and 603 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2022-12-14 09:17:21,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:17:21,917 INFO L93 Difference]: Finished difference Result 557 states and 603 transitions. [2022-12-14 09:17:21,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:17:21,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 556 [2022-12-14 09:17:21,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:17:21,918 INFO L225 Difference]: With dead ends: 557 [2022-12-14 09:17:21,918 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 09:17:21,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=292, Invalid=2570, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 09:17:21,920 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:17:21,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:17:21,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 09:17:21,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 09:17:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-12-14 09:17:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 09:17:21,921 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 556 [2022-12-14 09:17:21,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:17:21,921 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 09:17:21,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2022-12-14 09:17:21,922 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 09:17:21,922 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 09:17:21,924 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 09:17:21,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 09:17:22,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 09:17:22,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-14 09:17:59,838 WARN L233 SmtUtils]: Spent 37.70s on a formula simplification. DAG size of input: 2703 DAG size of output: 2692 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-12-14 09:18:59,885 WARN L233 SmtUtils]: Spent 59.73s on a formula simplification. DAG size of input: 2692 DAG size of output: 49 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-12-14 09:19:03,526 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-12-14 09:19:03,526 INFO L895 garLoopResultBuilder]: At program point L19-2(lines 19 21) the Hoare annotation is: (let ((.cse0 (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 268435455)) (.cse2 (< (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 10)) (.cse1 (< (mod (+ 4294967295 |ULTIMATE.start_main_~x~0#1|) 4294967296) 268435455))) (or (and .cse0 (<= 8 |ULTIMATE.start_main_~y~0#1|) .cse1 (<= |ULTIMATE.start_main_~y~0#1| 8)) (and .cse0 (<= |ULTIMATE.start_main_~y~0#1| 7) .cse1 (<= 7 |ULTIMATE.start_main_~y~0#1|)) (= |ULTIMATE.start_main_~x~0#1| 0) (and .cse0 (not (<= (+ (div |ULTIMATE.start_main_~y~0#1| 4294967296) 1) 0)) (<= |ULTIMATE.start_main_~y~0#1| 6) .cse1) (let ((.cse3 (< (mod (+ |ULTIMATE.start_main_~x~0#1| 4) 4294967296) 268435455))) (and (or (not .cse2) .cse3) .cse0 (or .cse3 (not (< (mod (+ |ULTIMATE.start_main_~y~0#1| 4) 4294967296) 10))) .cse1)) (and .cse0 (not (< (mod (+ |ULTIMATE.start_main_~y~0#1| 1) 4294967296) 10)) .cse2 .cse1))) [2022-12-14 09:19:03,526 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2022-12-14 09:19:03,526 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-12-14 09:19:03,526 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2022-12-14 09:19:03,527 INFO L895 garLoopResultBuilder]: At program point L16-2(lines 16 24) the Hoare annotation is: (or (and (or (not (< (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 10)) (< (mod (+ |ULTIMATE.start_main_~x~0#1| 4) 4294967296) 268435455)) (< (mod (+ 4294967295 |ULTIMATE.start_main_~x~0#1|) 4294967296) 268435455)) (and (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0))) [2022-12-14 09:19:03,527 INFO L899 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2022-12-14 09:19:03,527 INFO L902 garLoopResultBuilder]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2022-12-14 09:19:03,529 INFO L445 BasicCegarLoop]: Path program histogram: [8, 1, 1] [2022-12-14 09:19:03,531 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 09:19:03,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 09:19:03 BoogieIcfgContainer [2022-12-14 09:19:03,541 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 09:19:03,541 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 09:19:03,541 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 09:19:03,541 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 09:19:03,542 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:13:59" (3/4) ... [2022-12-14 09:19:03,544 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 09:19:03,549 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-12-14 09:19:03,549 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-12-14 09:19:03,549 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-14 09:19:03,549 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 09:19:03,568 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 09:19:03,568 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 09:19:03,569 INFO L158 Benchmark]: Toolchain (without parser) took 304924.31ms. Allocated memory was 144.7MB in the beginning and 664.8MB in the end (delta: 520.1MB). Free memory was 115.1MB in the beginning and 527.8MB in the end (delta: -412.7MB). Peak memory consumption was 107.8MB. Max. memory is 16.1GB. [2022-12-14 09:19:03,569 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 109.1MB. Free memory is still 74.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 09:19:03,569 INFO L158 Benchmark]: CACSL2BoogieTranslator took 170.45ms. Allocated memory is still 144.7MB. Free memory was 114.7MB in the beginning and 105.1MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 09:19:03,569 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.56ms. Allocated memory is still 144.7MB. Free memory was 105.1MB in the beginning and 103.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:19:03,570 INFO L158 Benchmark]: Boogie Preprocessor took 15.43ms. Allocated memory is still 144.7MB. Free memory was 103.7MB in the beginning and 102.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:19:03,570 INFO L158 Benchmark]: RCFGBuilder took 240.84ms. Allocated memory is still 144.7MB. Free memory was 102.6MB in the beginning and 92.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 09:19:03,570 INFO L158 Benchmark]: TraceAbstraction took 304441.84ms. Allocated memory was 144.7MB in the beginning and 664.8MB in the end (delta: 520.1MB). Free memory was 91.2MB in the beginning and 529.9MB in the end (delta: -438.7MB). Peak memory consumption was 396.0MB. Max. memory is 16.1GB. [2022-12-14 09:19:03,570 INFO L158 Benchmark]: Witness Printer took 27.13ms. Allocated memory is still 664.8MB. Free memory was 529.9MB in the beginning and 527.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:19:03,572 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 109.1MB. Free memory is still 74.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 170.45ms. Allocated memory is still 144.7MB. Free memory was 114.7MB in the beginning and 105.1MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.56ms. Allocated memory is still 144.7MB. Free memory was 105.1MB in the beginning and 103.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.43ms. Allocated memory is still 144.7MB. Free memory was 103.7MB in the beginning and 102.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 240.84ms. Allocated memory is still 144.7MB. Free memory was 102.6MB in the beginning and 92.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 304441.84ms. Allocated memory was 144.7MB in the beginning and 664.8MB in the end (delta: 520.1MB). Free memory was 91.2MB in the beginning and 529.9MB in the end (delta: -438.7MB). Peak memory consumption was 396.0MB. Max. memory is 16.1GB. * Witness Printer took 27.13ms. Allocated memory is still 664.8MB. Free memory was 529.9MB in the beginning and 527.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 304.4s, OverallIterations: 10, TraceHistogramMax: 460, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 176.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 101.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 252 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 252 mSDsluCounter, 882 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 824 mSDsCounter, 92 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3473 IncrementalHoareTripleChecker+Invalid, 3565 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 92 mSolverCounterUnsat, 58 mSDtfsCounter, 3473 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2850 GetRequests, 1966 SyntacticMatches, 435 SemanticMatches, 449 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18485 ImplicationChecksByTransitivity, 188.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=557occurred in iteration=9, InterpolantAutomatonStates: 324, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 10 MinimizatonAttempts, 1562 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 673 NumberOfFragments, 166 HoareAnnotationTreeSize, 3 FomulaSimplifications, 10153 FormulaSimplificationTreeSizeReduction, 38.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 138469 FormulaSimplificationTreeSizeReductionInter, 63.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 9.2s InterpolantComputationTime, 2440 NumberOfCodeBlocks, 1819 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 3074 ConstructedInterpolants, 0 QuantifiedInterpolants, 14520 SizeOfPredicates, 12 NumberOfNonLiveVariables, 1982 ConjunctsInSsa, 212 ConjunctsInUnsatCore, 25 InterpolantComputations, 3 PerfectInterpolantSequences, 158451/388973 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (((((((x % 4294967296 < 268435455 && 8 <= y) && (4294967295 + x) % 4294967296 < 268435455) && y <= 8) || (((x % 4294967296 < 268435455 && y <= 7) && (4294967295 + x) % 4294967296 < 268435455) && 7 <= y)) || x == 0) || (((x % 4294967296 < 268435455 && !(y / 4294967296 + 1 <= 0)) && y <= 6) && (4294967295 + x) % 4294967296 < 268435455)) || ((((!(y % 4294967296 < 10) || (x + 4) % 4294967296 < 268435455) && x % 4294967296 < 268435455) && ((x + 4) % 4294967296 < 268435455 || !((y + 4) % 4294967296 < 10))) && (4294967295 + x) % 4294967296 < 268435455)) || (((x % 4294967296 < 268435455 && !((y + 1) % 4294967296 < 10)) && y % 4294967296 < 10) && (4294967295 + x) % 4294967296 < 268435455) - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: ((!(y % 4294967296 < 10) || (x + 4) % 4294967296 < 268435455) && (4294967295 + x) % 4294967296 < 268435455) || (y == 0 && x == 0) RESULT: Ultimate proved your program to be correct! [2022-12-14 09:19:03,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9836b101-d72d-46e9-a3c7-fe1080dd0c57/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE