./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/functions_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/functions_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur --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 3c699f32b26271d9b8672d2685c3f1aa3d3ad54df32baf7d1d77d9a96ddd2517 --- 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-38b53e6 [2022-11-25 22:25:12,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:25:12,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:25:12,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:25:12,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:25:12,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:25:12,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:25:12,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:25:12,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:25:12,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:25:12,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:25:12,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:25:12,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:25:12,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:25:12,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:25:12,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:25:12,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:25:12,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:25:12,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:25:12,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:25:12,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:25:12,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:25:12,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:25:12,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:25:12,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:25:12,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:25:12,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:25:12,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:25:12,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:25:12,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:25:12,713 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:25:12,714 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:25:12,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:25:12,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:25:12,720 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:25:12,720 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:25:12,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:25:12,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:25:12,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:25:12,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:25:12,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:25:12,727 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:25:12,783 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:25:12,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:25:12,784 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:25:12,784 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:25:12,785 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:25:12,786 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:25:12,786 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:25:12,786 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:25:12,787 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:25:12,787 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:25:12,788 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:25:12,789 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:25:12,789 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:25:12,789 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:25:12,789 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:25:12,790 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:25:12,790 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:25:12,790 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:25:12,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:25:12,792 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:25:12,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:25:12,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:25:12,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:25:12,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:25:12,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:25:12,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:25:12,794 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:25:12,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:25:12,795 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:25:12,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:25:12,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:25:12,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:25:12,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:25:12,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:25:12,797 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:25:12,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:25:12,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:25:12,798 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:25:12,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:25:12,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:25:12,799 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:25:12,799 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_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c699f32b26271d9b8672d2685c3f1aa3d3ad54df32baf7d1d77d9a96ddd2517 [2022-11-25 22:25:13,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:25:13,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:25:13,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:25:13,190 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:25:13,190 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:25:13,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/loop-acceleration/functions_1-2.c [2022-11-25 22:25:16,610 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:25:16,892 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:25:16,893 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/sv-benchmarks/c/loop-acceleration/functions_1-2.c [2022-11-25 22:25:16,900 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/data/805f0acc5/c7c409eafad8458fa2611a2b9f272ad5/FLAG7dd50c8cc [2022-11-25 22:25:16,918 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/data/805f0acc5/c7c409eafad8458fa2611a2b9f272ad5 [2022-11-25 22:25:16,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:25:16,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:25:16,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:25:16,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:25:16,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:25:16,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:25:16" (1/1) ... [2022-11-25 22:25:16,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e76439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:16, skipping insertion in model container [2022-11-25 22:25:16,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:25:16" (1/1) ... [2022-11-25 22:25:16,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:25:16,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:25:17,126 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_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/sv-benchmarks/c/loop-acceleration/functions_1-2.c[325,338] [2022-11-25 22:25:17,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:25:17,154 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:25:17,169 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_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/sv-benchmarks/c/loop-acceleration/functions_1-2.c[325,338] [2022-11-25 22:25:17,172 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:25:17,189 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:25:17,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:17 WrapperNode [2022-11-25 22:25:17,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:25:17,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:25:17,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:25:17,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:25:17,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:17" (1/1) ... [2022-11-25 22:25:17,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:17" (1/1) ... [2022-11-25 22:25:17,232 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 28 [2022-11-25 22:25:17,232 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:25:17,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:25:17,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:25:17,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:25:17,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:17" (1/1) ... [2022-11-25 22:25:17,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:17" (1/1) ... [2022-11-25 22:25:17,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:17" (1/1) ... [2022-11-25 22:25:17,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:17" (1/1) ... [2022-11-25 22:25:17,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:17" (1/1) ... [2022-11-25 22:25:17,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:17" (1/1) ... [2022-11-25 22:25:17,257 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:17" (1/1) ... [2022-11-25 22:25:17,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:17" (1/1) ... [2022-11-25 22:25:17,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:25:17,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:25:17,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:25:17,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:25:17,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:17" (1/1) ... [2022-11-25 22:25:17,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:25:17,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:25:17,304 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:25:17,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:25:17,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:25:17,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:25:17,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:25:17,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:25:17,454 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:25:17,456 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:25:17,667 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:25:17,711 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:25:17,717 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 22:25:17,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:25:17 BoogieIcfgContainer [2022-11-25 22:25:17,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:25:17,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:25:17,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:25:17,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:25:17,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:25:16" (1/3) ... [2022-11-25 22:25:17,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691e6d49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:25:17, skipping insertion in model container [2022-11-25 22:25:17,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:25:17" (2/3) ... [2022-11-25 22:25:17,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691e6d49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:25:17, skipping insertion in model container [2022-11-25 22:25:17,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:25:17" (3/3) ... [2022-11-25 22:25:17,741 INFO L112 eAbstractionObserver]: Analyzing ICFG functions_1-2.c [2022-11-25 22:25:17,787 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:25:17,787 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:25:17,898 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:25:17,909 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;@30c001ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:25:17,910 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:25:17,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) 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) [2022-11-25 22:25:17,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 22:25:17,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:17,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 22:25:17,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:17,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:17,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1972614, now seen corresponding path program 1 times [2022-11-25 22:25:17,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:17,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389443763] [2022-11-25 22:25:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:17,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:18,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:18,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389443763] [2022-11-25 22:25:18,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389443763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:25:18,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:25:18,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:25:18,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239223747] [2022-11-25 22:25:18,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:25:18,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:25:18,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:18,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:25:18,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:25:18,466 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) 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) 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) [2022-11-25 22:25:18,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:18,506 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-11-25 22:25:18,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:25:18,509 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 [2022-11-25 22:25:18,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:18,517 INFO L225 Difference]: With dead ends: 13 [2022-11-25 22:25:18,518 INFO L226 Difference]: Without dead ends: 6 [2022-11-25 22:25:18,521 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 [2022-11-25 22:25:18,526 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:18,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:25:18,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2022-11-25 22:25:18,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2022-11-25 22:25:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2022-11-25 22:25:18,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2022-11-25 22:25:18,563 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2022-11-25 22:25:18,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:18,563 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2022-11-25 22:25:18,564 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) [2022-11-25 22:25:18,564 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2022-11-25 22:25:18,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 22:25:18,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:18,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 22:25:18,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:25:18,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:18,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:18,567 INFO L85 PathProgramCache]: Analyzing trace with hash 61048167, now seen corresponding path program 1 times [2022-11-25 22:25:18,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:18,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5507146] [2022-11-25 22:25:18,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:18,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:18,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:18,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5507146] [2022-11-25 22:25:18,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5507146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:25:18,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35890727] [2022-11-25 22:25:18,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:18,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:18,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:25:18,826 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:25:18,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:25:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:18,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 22:25:18,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:25:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:19,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:25:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:19,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35890727] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:25:19,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1539582754] [2022-11-25 22:25:19,168 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-25 22:25:19,168 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:25:19,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:25:19,181 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:25:19,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:25:19,546 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:25:19,799 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69#(and (<= 0 |ULTIMATE.start_main_~x~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 [2022-11-25 22:25:19,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:25:19,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:25:19,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 22:25:19,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249420209] [2022-11-25 22:25:19,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:25:19,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:25:19,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:19,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:25:19,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:25:19,812 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2022-11-25 22:25:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:19,866 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2022-11-25 22:25:19,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:25:19,868 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 5 [2022-11-25 22:25:19,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:19,869 INFO L225 Difference]: With dead ends: 12 [2022-11-25 22:25:19,869 INFO L226 Difference]: Without dead ends: 9 [2022-11-25 22:25:19,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-25 22:25:19,875 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:19,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:25:19,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-25 22:25:19,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-25 22:25:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 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) [2022-11-25 22:25:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-25 22:25:19,888 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-25 22:25:19,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:19,888 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-25 22:25:19,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2022-11-25 22:25:19,889 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-25 22:25:19,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 22:25:19,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:19,891 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2022-11-25 22:25:19,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:25:20,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:20,098 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:20,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:20,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1812629958, now seen corresponding path program 2 times [2022-11-25 22:25:20,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:20,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241561752] [2022-11-25 22:25:20,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:20,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:20,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:20,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241561752] [2022-11-25 22:25:20,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241561752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:25:20,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799107423] [2022-11-25 22:25:20,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:25:20,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:20,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:25:20,648 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:25:20,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:25:20,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 22:25:20,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:25:20,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 22:25:20,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:25:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:20,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:25:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:21,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799107423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:25:21,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [656997371] [2022-11-25 22:25:21,014 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-25 22:25:21,014 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:25:21,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:25:21,015 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:25:21,015 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:25:21,161 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:25:21,448 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '160#(and (<= 0 |ULTIMATE.start_main_~x~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 [2022-11-25 22:25:21,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:25:21,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:25:21,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 22:25:21,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889667187] [2022-11-25 22:25:21,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:25:21,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 22:25:21,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:21,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 22:25:21,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-25 22:25:21,451 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:21,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:21,936 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2022-11-25 22:25:21,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 22:25:21,937 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 22:25:21,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:21,938 INFO L225 Difference]: With dead ends: 18 [2022-11-25 22:25:21,938 INFO L226 Difference]: Without dead ends: 15 [2022-11-25 22:25:21,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:25:21,940 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:21,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:25:21,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-25 22:25:21,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-25 22:25:21,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:21,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-25 22:25:21,947 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2022-11-25 22:25:21,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:21,947 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-25 22:25:21,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:21,948 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-25 22:25:21,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 22:25:21,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:21,949 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2022-11-25 22:25:21,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:25:22,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:22,150 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:22,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1371813414, now seen corresponding path program 3 times [2022-11-25 22:25:22,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:22,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854960723] [2022-11-25 22:25:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:22,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:22,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:22,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854960723] [2022-11-25 22:25:22,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854960723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:25:22,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601192432] [2022-11-25 22:25:22,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:25:22,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:22,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:25:22,951 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:25:22,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:25:23,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:25:23,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:25:23,097 WARN L261 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-25 22:25:23,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:25:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:23,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:25:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:23,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601192432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:25:23,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [585929453] [2022-11-25 22:25:23,736 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-25 22:25:23,737 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:25:23,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:25:23,737 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:25:23,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:25:23,839 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:25:24,227 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '329#(and (<= 0 |ULTIMATE.start_main_~x~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 [2022-11-25 22:25:24,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:25:24,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:25:24,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-25 22:25:24,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949918844] [2022-11-25 22:25:24,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:25:24,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 22:25:24,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:24,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 22:25:24,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2022-11-25 22:25:24,231 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:33,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:33,724 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2022-11-25 22:25:33,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 22:25:33,725 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-25 22:25:33,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:33,726 INFO L225 Difference]: With dead ends: 30 [2022-11-25 22:25:33,726 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 22:25:33,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=449, Invalid=957, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 22:25:33,729 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:33,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:25:33,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 22:25:33,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-25 22:25:33,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:33,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-11-25 22:25:33,739 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2022-11-25 22:25:33,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:33,739 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-11-25 22:25:33,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:25:33,740 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-11-25 22:25:33,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-25 22:25:33,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:33,741 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2022-11-25 22:25:33,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:25:33,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:33,963 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:33,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:33,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1620915942, now seen corresponding path program 4 times [2022-11-25 22:25:33,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:33,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733418619] [2022-11-25 22:25:33,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:33,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:36,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:36,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733418619] [2022-11-25 22:25:36,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733418619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:25:36,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973625178] [2022-11-25 22:25:36,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:25:36,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:36,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:25:36,172 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:25:36,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:25:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:36,282 WARN L261 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 179 conjunts are in the unsatisfiable core [2022-11-25 22:25:36,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:25:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:36,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:25:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:25:38,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973625178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:25:38,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [717485115] [2022-11-25 22:25:38,277 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-25 22:25:38,277 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:25:38,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:25:38,278 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:25:38,278 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:25:38,376 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:25:38,905 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '654#(and (<= 0 |ULTIMATE.start_main_~x~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 [2022-11-25 22:25:38,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:25:38,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:25:38,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-25 22:25:38,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209119928] [2022-11-25 22:25:38,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:25:38,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-25 22:25:38,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:38,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-25 22:25:38,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=1973, Unknown=0, NotChecked=0, Total=2652 [2022-11-25 22:25:38,910 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:28:41,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:41,879 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2022-11-25 22:28:41,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 22:28:41,880 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 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 26 [2022-11-25 22:28:41,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:41,881 INFO L225 Difference]: With dead ends: 54 [2022-11-25 22:28:41,881 INFO L226 Difference]: Without dead ends: 51 [2022-11-25 22:28:41,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 185.0s TimeCoverageRelationStatistics Valid=1750, Invalid=3644, Unknown=8, NotChecked=0, Total=5402 [2022-11-25 22:28:41,885 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:41,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:28:41,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-25 22:28:41,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-25 22:28:41,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:28:41,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-11-25 22:28:41,932 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2022-11-25 22:28:41,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:41,933 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-11-25 22:28:41,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:28:41,936 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-11-25 22:28:41,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 22:28:41,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:41,938 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2022-11-25 22:28:41,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:42,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:42,145 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:42,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:42,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1280170086, now seen corresponding path program 5 times [2022-11-25 22:28:42,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:42,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834619921] [2022-11-25 22:28:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:42,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:28:48,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:48,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834619921] [2022-11-25 22:28:48,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834619921] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:48,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924935157] [2022-11-25 22:28:48,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:28:48,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:48,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:48,315 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:48,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c6d9b6-d4c3-486f-bb4c-5b8380b0faac/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:28:51,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-25 22:28:51,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:28:51,619 WARN L261 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 372 conjunts are in the unsatisfiable core [2022-11-25 22:28:51,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:28:52,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:29:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:29:15,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924935157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:29:15,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [351019454] [2022-11-25 22:29:15,469 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-25 22:29:15,469 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:29:15,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:29:15,470 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:29:15,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:29:15,535 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:29:17,264 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1291#(and (<= 0 |ULTIMATE.start_main_~x~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 [2022-11-25 22:29:17,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:29:17,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:29:17,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-25 22:29:17,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482811255] [2022-11-25 22:29:17,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:29:17,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-25 22:29:17,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:17,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-25 22:29:17,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2595, Invalid=7305, Unknown=0, NotChecked=0, Total=9900 [2022-11-25 22:29:17,273 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:08,900 WARN L233 SmtUtils]: Spent 3.06m on a formula simplification. DAG size of input: 282 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:33:10,929 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse11 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 80) 4294967296) 268435455)) (.cse8 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 16) 4294967296) 268435455)) (.cse19 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 6) 4294967296) 268435455)) (.cse21 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296) 268435455)) (.cse2 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 68) 4294967296) 268435455)) (.cse18 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 14) 4294967296) 268435455)) (.cse9 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 18) 4294967296) 268435455)) (.cse23 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 54) 4294967296) 268435455)) (.cse7 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 52) 4294967296) 268435455)) (.cse5 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 28) 4294967296) 268435455)) (.cse28 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 12) 4294967296) 268435455)) (.cse25 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 38) 4294967296) 268435455)) (.cse38 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 64) 4294967296) 268435455)) (.cse27 (< (mod (+ 66 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 268435455)) (.cse14 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 42) 4294967296) 268435455)) (.cse26 (< (mod (+ 40 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 268435455)) (.cse31 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296) 268435455)) (.cse20 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296) 268435455)) (.cse39 (< (mod (+ 88 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 268435455)) (.cse35 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 86) 4294967296) 268435455)) (.cse24 (< (mod (+ 56 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 268435455)) (.cse1 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 72) 4294967296) 268435455)) (.cse3 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 70) 4294967296) 268435455)) (.cse32 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 32) 4294967296) 268435455)) (.cse30 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 30) 4294967296) 268435455)) (.cse10 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 78) 4294967296) 268435455)) (.cse43 (< (mod (+ 76 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 268435455)) (.cse0 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 74) 4294967296) 268435455)) (.cse6 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 50) 4294967296) 268435455)) (.cse13 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 48) 4294967296) 268435455)) (.cse15 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 44) 4294967296) 268435455)) (.cse12 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 46) 4294967296) 268435455)) (.cse37 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 62) 4294967296) 268435455)) (.cse22 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 2) 4294967296) 268435455)) (.cse17 (< (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296) 268435455)) (.cse44 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 60) 4294967296) 268435455)) (.cse42 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 58) 4294967296) 268435455)) (.cse33 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 34) 4294967296) 268435455)) (.cse34 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 36) 4294967296) 268435455)) (.cse4 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 26) 4294967296) 268435455)) (.cse40 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 24) 4294967296) 268435455)) (.cse41 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 22) 4294967296) 268435455)) (.cse29 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 20) 4294967296) 268435455)) (.cse16 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 82) 4294967296) 268435455)) (.cse36 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 84) 4294967296) 268435455))) (and (or .cse0 (not .cse1)) (or (not .cse2) .cse3) (or (not .cse4) .cse5) (or (not .cse6) .cse7) (or (not .cse8) .cse9) (or (not .cse10) .cse11) (or (not .cse12) .cse13) (or (not .cse14) .cse15) (or .cse16 (not .cse11)) .cse17 (or .cse8 (not .cse18)) (or (not .cse19) .cse20) (or .cse21 (not .cse22)) (or .cse19 (not .cse21)) (or (not .cse23) .cse24) (or (not .cse25) .cse26) (or .cse2 (not .cse27)) (or .cse18 (not .cse28)) (or .cse29 (not .cse9)) (or .cse23 (not .cse7)) (or (not .cse5) .cse30) (or (not .cse31) .cse28) (or (not .cse32) .cse33) (or .cse25 (not .cse34)) (or .cse35 (not .cse36)) (or (not .cse37) .cse38) (or (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 90) 4294967296) 268435455) (not .cse39)) (or (not .cse38) .cse27) (or .cse40 (not .cse41)) (or .cse14 (not .cse26)) (or .cse31 (not .cse20)) (or .cse39 (not .cse35)) (or (not .cse24) .cse42) (or .cse1 (not .cse3)) (or .cse32 (not .cse30)) (or (not .cse43) .cse10) (or .cse43 (not .cse0)) (or .cse6 (not .cse13)) (or (not .cse15) .cse12) (or (not .cse44) .cse37) (or .cse22 (not .cse17)) (or .cse44 (not .cse42)) (or (not .cse33) .cse34) (or .cse4 (not .cse40)) (or .cse41 (not .cse29)) (or (not .cse16) .cse36))) is different from false [2022-11-25 22:33:12,946 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse11 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 80) 4294967296) 268435455)) (.cse8 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 16) 4294967296) 268435455)) (.cse19 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 6) 4294967296) 268435455)) (.cse21 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296) 268435455)) (.cse2 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 68) 4294967296) 268435455)) (.cse18 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 14) 4294967296) 268435455)) (.cse9 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 18) 4294967296) 268435455)) (.cse23 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 54) 4294967296) 268435455)) (.cse7 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 52) 4294967296) 268435455)) (.cse5 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 28) 4294967296) 268435455)) (.cse28 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 12) 4294967296) 268435455)) (.cse25 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 38) 4294967296) 268435455)) (.cse38 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 64) 4294967296) 268435455)) (.cse27 (< (mod (+ 66 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 268435455)) (.cse14 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 42) 4294967296) 268435455)) (.cse26 (< (mod (+ 40 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 268435455)) (.cse31 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296) 268435455)) (.cse20 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296) 268435455)) (.cse35 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 86) 4294967296) 268435455)) (.cse24 (< (mod (+ 56 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 268435455)) (.cse1 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 72) 4294967296) 268435455)) (.cse3 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 70) 4294967296) 268435455)) (.cse32 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 32) 4294967296) 268435455)) (.cse30 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 30) 4294967296) 268435455)) (.cse10 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 78) 4294967296) 268435455)) (.cse42 (< (mod (+ 76 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 268435455)) (.cse0 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 74) 4294967296) 268435455)) (.cse6 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 50) 4294967296) 268435455)) (.cse13 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 48) 4294967296) 268435455)) (.cse15 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 44) 4294967296) 268435455)) (.cse12 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 46) 4294967296) 268435455)) (.cse37 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 62) 4294967296) 268435455)) (.cse22 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 2) 4294967296) 268435455)) (.cse17 (< (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296) 268435455)) (.cse43 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 60) 4294967296) 268435455)) (.cse41 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 58) 4294967296) 268435455)) (.cse33 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 34) 4294967296) 268435455)) (.cse34 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 36) 4294967296) 268435455)) (.cse4 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 26) 4294967296) 268435455)) (.cse39 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 24) 4294967296) 268435455)) (.cse40 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 22) 4294967296) 268435455)) (.cse29 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 20) 4294967296) 268435455)) (.cse16 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 82) 4294967296) 268435455)) (.cse36 (< (mod (+ |c_ULTIMATE.start_main_~x~0#1| 84) 4294967296) 268435455))) (and (or .cse0 (not .cse1)) (or (not .cse2) .cse3) (or (not .cse4) .cse5) (or (not .cse6) .cse7) (or (not .cse8) .cse9) (or (not .cse10) .cse11) (or (not .cse12) .cse13) (or (not .cse14) .cse15) (or .cse16 (not .cse11)) .cse17 (or .cse8 (not .cse18)) (or (not .cse19) .cse20) (or .cse21 (not .cse22)) (or .cse19 (not .cse21)) (or (not .cse23) .cse24) (or (not .cse25) .cse26) (or .cse2 (not .cse27)) (or .cse18 (not .cse28)) (or .cse29 (not .cse9)) (or .cse23 (not .cse7)) (or (not .cse5) .cse30) (or (not .cse31) .cse28) (or (not .cse32) .cse33) (or .cse25 (not .cse34)) (or .cse35 (not .cse36)) (or (not .cse37) .cse38) (or (not .cse38) .cse27) (or .cse39 (not .cse40)) (or .cse14 (not .cse26)) (or .cse31 (not .cse20)) (or (< (mod (+ 88 |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 268435455) (not .cse35)) (or (not .cse24) .cse41) (or .cse1 (not .cse3)) (or .cse32 (not .cse30)) (or (not .cse42) .cse10) (or .cse42 (not .cse0)) (or .cse6 (not .cse13)) (or (not .cse15) .cse12) (or (not .cse43) .cse37) (or .cse22 (not .cse17)) (or .cse43 (not .cse41)) (or (not .cse33) .cse34) (or .cse4 (not .cse39)) (or .cse40 (not .cse29)) (or (not .cse16) .cse36))) is different from false [2022-11-25 22:36:59,478 WARN L233 SmtUtils]: Spent 2.90m on a formula simplification. DAG size of input: 264 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)