./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de32.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de32.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 05:34:45,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:34:45,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:34:46,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:34:46,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:34:46,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:34:46,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:34:46,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:34:46,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:34:46,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:34:46,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:34:46,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:34:46,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:34:46,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:34:46,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:34:46,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:34:46,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:34:46,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:34:46,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:34:46,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:34:46,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:34:46,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:34:46,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:34:46,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:34:46,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:34:46,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:34:46,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:34:46,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:34:46,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:34:46,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:34:46,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:34:46,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:34:46,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:34:46,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:34:46,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:34:46,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:34:46,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:34:46,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:34:46,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:34:46,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:34:46,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:34:46,043 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:34:46,060 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:34:46,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:34:46,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:34:46,061 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:34:46,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:34:46,062 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:34:46,062 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:34:46,062 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:34:46,062 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:34:46,063 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:34:46,063 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:34:46,063 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:34:46,063 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:34:46,063 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:34:46,063 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:34:46,063 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:34:46,064 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:34:46,064 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:34:46,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:34:46,065 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:34:46,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:34:46,065 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:34:46,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:34:46,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:34:46,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:34:46,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:34:46,066 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:34:46,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:34:46,066 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:34:46,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:34:46,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:34:46,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:34:46,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:34:46,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:34:46,067 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:34:46,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:34:46,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:34:46,067 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:34:46,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:34:46,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:34:46,068 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:34:46,068 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_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 [2022-12-14 05:34:46,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:34:46,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:34:46,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:34:46,260 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:34:46,260 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:34:46,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loops-crafted-1/in-de32.c [2022-12-14 05:34:48,893 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:34:49,062 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:34:49,063 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/sv-benchmarks/c/loops-crafted-1/in-de32.c [2022-12-14 05:34:49,068 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/data/0ade03d6e/6086320860f44efbbaff878008ea2472/FLAGa09727ade [2022-12-14 05:34:49,080 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/data/0ade03d6e/6086320860f44efbbaff878008ea2472 [2022-12-14 05:34:49,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:34:49,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:34:49,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:34:49,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:34:49,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:34:49,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:34:49" (1/1) ... [2022-12-14 05:34:49,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ef80425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:49, skipping insertion in model container [2022-12-14 05:34:49,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:34:49" (1/1) ... [2022-12-14 05:34:49,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:34:49,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:34:49,211 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_b5484d93-d90f-48cb-a537-8841e940b14b/sv-benchmarks/c/loops-crafted-1/in-de32.c[368,381] [2022-12-14 05:34:49,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:34:49,229 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:34:49,238 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_b5484d93-d90f-48cb-a537-8841e940b14b/sv-benchmarks/c/loops-crafted-1/in-de32.c[368,381] [2022-12-14 05:34:49,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:34:49,250 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:34:49,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:49 WrapperNode [2022-12-14 05:34:49,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:34:49,252 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:34:49,252 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:34:49,252 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:34:49,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:49" (1/1) ... [2022-12-14 05:34:49,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:49" (1/1) ... [2022-12-14 05:34:49,275 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2022-12-14 05:34:49,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:34:49,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:34:49,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:34:49,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:34:49,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:49" (1/1) ... [2022-12-14 05:34:49,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:49" (1/1) ... [2022-12-14 05:34:49,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:49" (1/1) ... [2022-12-14 05:34:49,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:49" (1/1) ... [2022-12-14 05:34:49,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:49" (1/1) ... [2022-12-14 05:34:49,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:49" (1/1) ... [2022-12-14 05:34:49,288 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:49" (1/1) ... [2022-12-14 05:34:49,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:49" (1/1) ... [2022-12-14 05:34:49,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:34:49,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:34:49,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:34:49,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:34:49,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:49" (1/1) ... [2022-12-14 05:34:49,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:34:49,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:49,316 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:34:49,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:34:49,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:34:49,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:34:49,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:34:49,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:34:49,395 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:34:49,397 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:34:49,478 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:34:49,499 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:34:49,499 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 05:34:49,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:34:49 BoogieIcfgContainer [2022-12-14 05:34:49,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:34:49,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:34:49,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:34:49,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:34:49,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:34:49" (1/3) ... [2022-12-14 05:34:49,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307704c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:34:49, skipping insertion in model container [2022-12-14 05:34:49,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:34:49" (2/3) ... [2022-12-14 05:34:49,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307704c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:34:49, skipping insertion in model container [2022-12-14 05:34:49,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:34:49" (3/3) ... [2022-12-14 05:34:49,508 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de32.c [2022-12-14 05:34:49,523 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:34:49,523 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 05:34:49,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:34:49,564 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;@5242e3d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:34:49,564 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 05:34:49,567 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:49,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 05:34:49,572 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:49,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 05:34:49,572 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:49,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:49,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1774769397, now seen corresponding path program 1 times [2022-12-14 05:34:49,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:49,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342029461] [2022-12-14 05:34:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:49,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:34:49,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:49,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342029461] [2022-12-14 05:34:49,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342029461] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:34:49,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:34:49,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:34:49,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141691252] [2022-12-14 05:34:49,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:34:49,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:34:49,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:49,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:34:49,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:34:49,825 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:49,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:49,884 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2022-12-14 05:34:49,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:34:49,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 05:34:49,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:49,891 INFO L225 Difference]: With dead ends: 18 [2022-12-14 05:34:49,891 INFO L226 Difference]: Without dead ends: 9 [2022-12-14 05:34:49,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:34:49,896 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:49,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:34:49,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-12-14 05:34:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-12-14 05:34:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:49,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2022-12-14 05:34:49,921 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 6 [2022-12-14 05:34:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:49,922 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2022-12-14 05:34:49,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:49,922 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2022-12-14 05:34:49,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 05:34:49,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:49,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:49,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 05:34:49,923 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:49,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:49,923 INFO L85 PathProgramCache]: Analyzing trace with hash 786204085, now seen corresponding path program 1 times [2022-12-14 05:34:49,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:49,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838502276] [2022-12-14 05:34:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:49,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:34:50,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:50,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838502276] [2022-12-14 05:34:50,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838502276] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:34:50,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:34:50,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:34:50,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996331078] [2022-12-14 05:34:50,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:34:50,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:34:50,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:50,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:34:50,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:34:50,013 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:50,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:50,048 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2022-12-14 05:34:50,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:34:50,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 05:34:50,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:50,049 INFO L225 Difference]: With dead ends: 17 [2022-12-14 05:34:50,049 INFO L226 Difference]: Without dead ends: 10 [2022-12-14 05:34:50,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:34:50,051 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:50,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:34:50,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-14 05:34:50,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-12-14 05:34:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-12-14 05:34:50,056 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2022-12-14 05:34:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:50,056 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-12-14 05:34:50,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2022-12-14 05:34:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 05:34:50,057 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:50,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:50,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 05:34:50,058 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:50,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:50,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1794229100, now seen corresponding path program 1 times [2022-12-14 05:34:50,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:50,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760195498] [2022-12-14 05:34:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:50,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:34:50,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:50,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760195498] [2022-12-14 05:34:50,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760195498] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:34:50,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545545891] [2022-12-14 05:34:50,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:50,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:50,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:50,165 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:50,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:34:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:50,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:34:50,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:34:50,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:34:50,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545545891] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 05:34:50,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:34:50,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 8 [2022-12-14 05:34:50,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215719832] [2022-12-14 05:34:50,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:34:50,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:34:50,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:50,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:34:50,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:34:50,294 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:50,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:50,313 INFO L93 Difference]: Finished difference Result 14 states and 17 transitions. [2022-12-14 05:34:50,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:34:50,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 05:34:50,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:50,314 INFO L225 Difference]: With dead ends: 14 [2022-12-14 05:34:50,314 INFO L226 Difference]: Without dead ends: 11 [2022-12-14 05:34:50,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:34:50,316 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:50,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:34:50,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-12-14 05:34:50,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2022-12-14 05:34:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:50,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-12-14 05:34:50,321 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 8 [2022-12-14 05:34:50,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:50,321 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-12-14 05:34:50,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:50,322 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-12-14 05:34:50,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 05:34:50,322 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:50,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:50,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:34:50,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:50,524 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:50,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:50,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1764408309, now seen corresponding path program 1 times [2022-12-14 05:34:50,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:50,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182585236] [2022-12-14 05:34:50,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:50,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:34:50,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:50,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182585236] [2022-12-14 05:34:50,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182585236] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:34:50,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701031579] [2022-12-14 05:34:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:50,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:50,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:50,701 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:50,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:34:50,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:50,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:34:50,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:34:50,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:34:50,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701031579] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 05:34:50,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:34:50,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-12-14 05:34:50,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234084118] [2022-12-14 05:34:50,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:34:50,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:34:50,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:50,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:34:50,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:34:50,788 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:50,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:50,808 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2022-12-14 05:34:50,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:34:50,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 05:34:50,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:50,809 INFO L225 Difference]: With dead ends: 15 [2022-12-14 05:34:50,809 INFO L226 Difference]: Without dead ends: 10 [2022-12-14 05:34:50,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:34:50,810 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:50,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:34:50,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-14 05:34:50,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-12-14 05:34:50,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:50,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-12-14 05:34:50,815 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 8 [2022-12-14 05:34:50,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:50,816 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-12-14 05:34:50,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-12-14 05:34:50,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:34:50,816 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:50,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:50,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:34:51,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:51,018 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:51,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:51,020 INFO L85 PathProgramCache]: Analyzing trace with hash 212774083, now seen corresponding path program 1 times [2022-12-14 05:34:51,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:51,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086797450] [2022-12-14 05:34:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:51,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:34:51,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:51,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086797450] [2022-12-14 05:34:51,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086797450] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:34:51,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753576623] [2022-12-14 05:34:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:51,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:51,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:51,243 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:51,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:34:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:51,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:34:51,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:34:51,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:34:51,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753576623] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:51,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1904429949] [2022-12-14 05:34:51,401 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:34:51,401 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:34:51,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:34:51,409 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:34:51,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:34:51,525 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:34:51,603 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '335#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:34:51,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:34:51,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:34:51,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-12-14 05:34:51,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375617087] [2022-12-14 05:34:51,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:34:51,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:34:51,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:51,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:34:51,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:34:51,605 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:51,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:51,647 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2022-12-14 05:34:51,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:34:51,647 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 05:34:51,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:51,648 INFO L225 Difference]: With dead ends: 16 [2022-12-14 05:34:51,648 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 05:34:51,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:34:51,649 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:51,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:34:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 05:34:51,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-12-14 05:34:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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) [2022-12-14 05:34:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-12-14 05:34:51,655 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 9 [2022-12-14 05:34:51,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:51,655 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-12-14 05:34:51,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:51,655 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-12-14 05:34:51,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 05:34:51,656 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:51,656 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:51,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 05:34:51,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:51,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:51,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:51,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1375886091, now seen corresponding path program 2 times [2022-12-14 05:34:51,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:51,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851051753] [2022-12-14 05:34:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:51,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:34:51,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:51,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851051753] [2022-12-14 05:34:51,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851051753] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:34:51,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800650108] [2022-12-14 05:34:51,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:34:51,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:51,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:51,929 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:51,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 05:34:51,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 05:34:51,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:34:51,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 05:34:51,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:34:52,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:34:52,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800650108] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:52,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1305150547] [2022-12-14 05:34:52,066 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:34:52,066 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:34:52,066 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:34:52,066 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:34:52,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:34:52,138 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:34:52,222 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '452#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:34:52,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:34:52,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:34:52,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 12 [2022-12-14 05:34:52,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838735567] [2022-12-14 05:34:52,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:34:52,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 05:34:52,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:52,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 05:34:52,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:34:52,225 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:52,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:52,321 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2022-12-14 05:34:52,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:34:52,322 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 05:34:52,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:52,323 INFO L225 Difference]: With dead ends: 36 [2022-12-14 05:34:52,323 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 05:34:52,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-12-14 05:34:52,325 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:52,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:34:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 05:34:52,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 12. [2022-12-14 05:34:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-12-14 05:34:52,330 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2022-12-14 05:34:52,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:52,331 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-12-14 05:34:52,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-12-14 05:34:52,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 05:34:52,331 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:52,331 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:52,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 05:34:52,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 05:34:52,533 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:52,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:52,534 INFO L85 PathProgramCache]: Analyzing trace with hash -60019915, now seen corresponding path program 3 times [2022-12-14 05:34:52,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:52,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133950901] [2022-12-14 05:34:52,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:52,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:34:52,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:52,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133950901] [2022-12-14 05:34:52,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133950901] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:34:52,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828016250] [2022-12-14 05:34:52,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:34:52,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:52,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:52,725 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:52,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:34:52,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:34:52,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:34:52,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:34:52,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:34:52,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:34:52,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828016250] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:52,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2050745104] [2022-12-14 05:34:52,858 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:34:52,858 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:34:52,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:34:52,859 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:34:52,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:34:52,919 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:34:53,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '619#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:34:53,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:34:53,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:34:53,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-14 05:34:53,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884613897] [2022-12-14 05:34:53,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:34:53,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 05:34:53,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:53,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 05:34:53,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:34:53,012 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:53,136 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-12-14 05:34:53,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 05:34:53,137 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 05:34:53,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:53,137 INFO L225 Difference]: With dead ends: 33 [2022-12-14 05:34:53,137 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 05:34:53,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-12-14 05:34:53,138 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:53,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 16 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:34:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 05:34:53,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-12-14 05:34:53,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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) [2022-12-14 05:34:53,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-12-14 05:34:53,148 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2022-12-14 05:34:53,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:53,149 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-12-14 05:34:53,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:53,149 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-12-14 05:34:53,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 05:34:53,149 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:53,149 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:53,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 05:34:53,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 05:34:53,350 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:53,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:53,350 INFO L85 PathProgramCache]: Analyzing trace with hash -454325109, now seen corresponding path program 4 times [2022-12-14 05:34:53,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:53,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628908889] [2022-12-14 05:34:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:53,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:34:53,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:53,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628908889] [2022-12-14 05:34:53,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628908889] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:34:53,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521921068] [2022-12-14 05:34:53,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:34:53,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:53,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:53,455 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:53,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 05:34:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:53,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:34:53,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:34:53,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:34:53,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521921068] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:53,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2005622324] [2022-12-14 05:34:53,556 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:34:53,556 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:34:53,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:34:53,557 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:34:53,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:34:53,603 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:34:53,675 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '796#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:34:53,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:34:53,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:34:53,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-12-14 05:34:53,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166471307] [2022-12-14 05:34:53,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:34:53,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:34:53,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:53,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:34:53,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:34:53,677 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:53,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:53,736 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-12-14 05:34:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:34:53,737 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 05:34:53,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:53,737 INFO L225 Difference]: With dead ends: 32 [2022-12-14 05:34:53,737 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 05:34:53,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:34:53,738 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:53,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:34:53,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 05:34:53,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-12-14 05:34:53,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:53,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-12-14 05:34:53,748 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 12 [2022-12-14 05:34:53,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:53,748 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-12-14 05:34:53,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:53,748 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-12-14 05:34:53,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 05:34:53,748 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:53,748 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:53,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 05:34:53,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:53,949 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:53,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:53,949 INFO L85 PathProgramCache]: Analyzing trace with hash 209136020, now seen corresponding path program 5 times [2022-12-14 05:34:53,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:53,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741177371] [2022-12-14 05:34:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:53,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:34:54,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:54,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741177371] [2022-12-14 05:34:54,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741177371] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:34:54,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674580741] [2022-12-14 05:34:54,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:34:54,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:54,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:54,025 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:54,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 05:34:54,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 05:34:54,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:34:54,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 05:34:54,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:34:54,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:34:54,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674580741] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:54,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2084733724] [2022-12-14 05:34:54,225 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:34:54,225 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:34:54,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:34:54,226 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:34:54,226 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:34:54,275 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:34:54,366 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '997#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:34:54,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:34:54,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:34:54,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-12-14 05:34:54,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140276695] [2022-12-14 05:34:54,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:34:54,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 05:34:54,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:54,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 05:34:54,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:34:54,368 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 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) [2022-12-14 05:34:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:54,627 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-12-14 05:34:54,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 05:34:54,628 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 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 [2022-12-14 05:34:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:54,628 INFO L225 Difference]: With dead ends: 73 [2022-12-14 05:34:54,628 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 05:34:54,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2022-12-14 05:34:54,630 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:54,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 18 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:34:54,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 05:34:54,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 24. [2022-12-14 05:34:54,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2022-12-14 05:34:54,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-14 05:34:54,637 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2022-12-14 05:34:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:54,637 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-14 05:34:54,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 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) [2022-12-14 05:34:54,637 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-14 05:34:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 05:34:54,638 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:54,638 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:54,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 05:34:54,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:54,839 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:54,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:54,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1135226996, now seen corresponding path program 6 times [2022-12-14 05:34:54,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:54,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140420721] [2022-12-14 05:34:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:54,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:34:54,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:54,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140420721] [2022-12-14 05:34:54,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140420721] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:34:54,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145836774] [2022-12-14 05:34:54,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:34:54,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:54,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:54,943 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:54,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 05:34:54,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:34:54,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:34:54,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 05:34:54,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:34:55,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:34:55,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145836774] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:55,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1277151305] [2022-12-14 05:34:55,139 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:34:55,139 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:34:55,139 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:34:55,140 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:34:55,140 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:34:55,185 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:34:55,285 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1300#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:34:55,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:34:55,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:34:55,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-12-14 05:34:55,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251369787] [2022-12-14 05:34:55,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:34:55,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 05:34:55,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:55,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 05:34:55,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-12-14 05:34:55,286 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:55,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:55,639 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-12-14 05:34:55,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 05:34:55,640 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 05:34:55,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:55,640 INFO L225 Difference]: With dead ends: 51 [2022-12-14 05:34:55,640 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 05:34:55,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-12-14 05:34:55,642 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 21 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:55,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 22 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:34:55,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 05:34:55,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-12-14 05:34:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:55,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-12-14 05:34:55,658 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 15 [2022-12-14 05:34:55,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:55,658 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-12-14 05:34:55,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:55,659 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-12-14 05:34:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 05:34:55,659 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:55,659 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:55,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 05:34:55,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 05:34:55,861 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:55,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:55,862 INFO L85 PathProgramCache]: Analyzing trace with hash -2107416637, now seen corresponding path program 7 times [2022-12-14 05:34:55,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:55,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707608784] [2022-12-14 05:34:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:55,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:34:56,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:56,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707608784] [2022-12-14 05:34:56,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707608784] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:34:56,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960272745] [2022-12-14 05:34:56,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:34:56,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:56,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:56,062 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:56,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 05:34:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:56,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 05:34:56,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:34:56,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:34:56,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960272745] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:56,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [352214783] [2022-12-14 05:34:56,160 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:34:56,160 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:34:56,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:34:56,160 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:34:56,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:34:56,219 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:34:56,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1570#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:34:56,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:34:56,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:34:56,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-12-14 05:34:56,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95909528] [2022-12-14 05:34:56,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:34:56,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:34:56,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:56,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:34:56,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:34:56,272 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-12-14 05:34:56,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:56,336 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-12-14 05:34:56,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:34:56,336 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) Word has length 15 [2022-12-14 05:34:56,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:56,337 INFO L225 Difference]: With dead ends: 47 [2022-12-14 05:34:56,337 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 05:34:56,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:34:56,338 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:56,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:34:56,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 05:34:56,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-12-14 05:34:56,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:56,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-12-14 05:34:56,350 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 15 [2022-12-14 05:34:56,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:56,350 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-12-14 05:34:56,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-12-14 05:34:56,350 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-12-14 05:34:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 05:34:56,350 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:56,350 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:56,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 05:34:56,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 05:34:56,552 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:56,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:56,553 INFO L85 PathProgramCache]: Analyzing trace with hash -239059381, now seen corresponding path program 8 times [2022-12-14 05:34:56,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:56,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781426615] [2022-12-14 05:34:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:56,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:34:56,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:56,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781426615] [2022-12-14 05:34:56,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781426615] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:34:56,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738167243] [2022-12-14 05:34:56,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:34:56,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:56,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:56,756 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:56,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 05:34:56,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 05:34:56,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:34:56,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 05:34:56,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:34:56,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:34:56,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738167243] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:56,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1130274239] [2022-12-14 05:34:56,989 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:34:56,989 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:34:56,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:34:56,989 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:34:56,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:34:57,037 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:34:57,128 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1845#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:34:57,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:34:57,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:34:57,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2022-12-14 05:34:57,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914318103] [2022-12-14 05:34:57,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:34:57,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 05:34:57,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:57,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 05:34:57,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-12-14 05:34:57,130 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:57,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:57,409 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2022-12-14 05:34:57,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 05:34:57,409 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 05:34:57,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:57,410 INFO L225 Difference]: With dead ends: 79 [2022-12-14 05:34:57,410 INFO L226 Difference]: Without dead ends: 67 [2022-12-14 05:34:57,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2022-12-14 05:34:57,411 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 39 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:57,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 24 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:34:57,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-14 05:34:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 31. [2022-12-14 05:34:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-12-14 05:34:57,427 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16 [2022-12-14 05:34:57,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:57,427 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-12-14 05:34:57,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-12-14 05:34:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 05:34:57,428 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:57,428 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:57,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 05:34:57,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:57,630 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:57,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:57,631 INFO L85 PathProgramCache]: Analyzing trace with hash 881880980, now seen corresponding path program 9 times [2022-12-14 05:34:57,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:57,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088386640] [2022-12-14 05:34:57,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:57,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:34:57,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:57,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088386640] [2022-12-14 05:34:57,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088386640] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:34:57,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290687418] [2022-12-14 05:34:57,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:34:57,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:57,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:57,787 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:57,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 05:34:57,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:34:57,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:34:57,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 05:34:57,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:34:57,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 05:34:58,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290687418] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:58,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1129601475] [2022-12-14 05:34:58,046 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:34:58,046 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:34:58,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:34:58,046 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:34:58,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:34:58,089 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:34:58,210 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2199#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:34:58,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:34:58,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:34:58,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2022-12-14 05:34:58,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007681647] [2022-12-14 05:34:58,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:34:58,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 05:34:58,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:58,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 05:34:58,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-12-14 05:34:58,212 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:58,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:58,931 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2022-12-14 05:34:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 05:34:58,932 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 05:34:58,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:58,932 INFO L225 Difference]: With dead ends: 63 [2022-12-14 05:34:58,932 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 05:34:58,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 05:34:58,934 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:58,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 26 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:34:58,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 05:34:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2022-12-14 05:34:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 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) [2022-12-14 05:34:58,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-12-14 05:34:58,955 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 18 [2022-12-14 05:34:58,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:58,956 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-12-14 05:34:58,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:58,956 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-12-14 05:34:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 05:34:58,956 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:58,956 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:58,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 05:34:59,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:59,157 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:59,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:59,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1384460789, now seen corresponding path program 10 times [2022-12-14 05:34:59,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:59,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726847625] [2022-12-14 05:34:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:59,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:34:59,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:34:59,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726847625] [2022-12-14 05:34:59,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726847625] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:34:59,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985543732] [2022-12-14 05:34:59,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:34:59,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:59,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:59,286 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:59,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 05:34:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:59,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 05:34:59,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:34:59,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:34:59,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985543732] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:59,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1139820955] [2022-12-14 05:34:59,391 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:34:59,391 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:34:59,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:34:59,391 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:34:59,392 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:34:59,431 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:34:59,516 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2538#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:34:59,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:34:59,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:34:59,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-12-14 05:34:59,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145650751] [2022-12-14 05:34:59,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:34:59,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 05:34:59,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:34:59,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 05:34:59,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:34:59,518 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:59,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:59,630 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-12-14 05:34:59,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 05:34:59,630 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 05:34:59,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:59,631 INFO L225 Difference]: With dead ends: 57 [2022-12-14 05:34:59,631 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 05:34:59,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-12-14 05:34:59,632 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:59,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 17 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:34:59,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 05:34:59,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2022-12-14 05:34:59,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:59,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-12-14 05:34:59,649 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 18 [2022-12-14 05:34:59,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:59,649 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-12-14 05:34:59,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:59,649 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-12-14 05:34:59,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 05:34:59,649 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:59,649 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:59,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 05:34:59,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 05:34:59,851 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:34:59,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:59,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1234948939, now seen corresponding path program 11 times [2022-12-14 05:34:59,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:34:59,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765161991] [2022-12-14 05:34:59,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:59,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:34:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:35:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 05:35:00,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:35:00,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765161991] [2022-12-14 05:35:00,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765161991] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:35:00,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606853556] [2022-12-14 05:35:00,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:35:00,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:35:00,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:35:00,001 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:35:00,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 05:35:00,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 05:35:00,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:35:00,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 05:35:00,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:35:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 05:35:00,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:35:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 05:35:00,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606853556] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:35:00,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1217490046] [2022-12-14 05:35:00,337 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:35:00,337 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:35:00,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:35:00,337 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:35:00,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:35:00,386 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:35:00,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2878#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:35:00,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:35:00,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:35:00,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 27 [2022-12-14 05:35:00,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479999855] [2022-12-14 05:35:00,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:35:00,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 05:35:00,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:35:00,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 05:35:00,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-12-14 05:35:00,496 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:01,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:35:01,144 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2022-12-14 05:35:01,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 05:35:01,145 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-14 05:35:01,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:35:01,146 INFO L225 Difference]: With dead ends: 108 [2022-12-14 05:35:01,146 INFO L226 Difference]: Without dead ends: 93 [2022-12-14 05:35:01,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 05:35:01,147 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:35:01,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 38 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:35:01,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-14 05:35:01,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 37. [2022-12-14 05:35:01,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:01,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-12-14 05:35:01,164 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 20 [2022-12-14 05:35:01,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:35:01,164 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-12-14 05:35:01,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:01,164 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-12-14 05:35:01,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 05:35:01,165 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:35:01,165 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 05:35:01,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 05:35:01,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 05:35:01,366 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:35:01,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:35:01,368 INFO L85 PathProgramCache]: Analyzing trace with hash -264219124, now seen corresponding path program 12 times [2022-12-14 05:35:01,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:35:01,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263050087] [2022-12-14 05:35:01,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:35:01,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:35:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:35:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 05:35:01,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:35:01,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263050087] [2022-12-14 05:35:01,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263050087] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:35:01,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365165995] [2022-12-14 05:35:01,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:35:01,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:35:01,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:35:01,523 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:35:01,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 05:35:01,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:35:01,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:35:01,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 05:35:01,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:35:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 05:35:01,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:35:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 05:35:01,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365165995] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:35:01,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1654917298] [2022-12-14 05:35:01,859 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:35:01,859 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:35:01,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:35:01,860 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:35:01,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:35:01,896 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:35:02,001 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3334#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:35:02,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:35:02,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:35:02,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 29 [2022-12-14 05:35:02,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539614274] [2022-12-14 05:35:02,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:35:02,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 05:35:02,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:35:02,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 05:35:02,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 05:35:02,002 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:03,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:35:03,020 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-12-14 05:35:03,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 05:35:03,021 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 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 21 [2022-12-14 05:35:03,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:35:03,021 INFO L225 Difference]: With dead ends: 74 [2022-12-14 05:35:03,021 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 05:35:03,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=318, Invalid=2034, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 05:35:03,022 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:35:03,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 32 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:35:03,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 05:35:03,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2022-12-14 05:35:03,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:03,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-12-14 05:35:03,043 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 21 [2022-12-14 05:35:03,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:35:03,044 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-12-14 05:35:03,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:03,044 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-12-14 05:35:03,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 05:35:03,044 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:35:03,044 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 05:35:03,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 05:35:03,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 05:35:03,245 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:35:03,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:35:03,246 INFO L85 PathProgramCache]: Analyzing trace with hash -670240061, now seen corresponding path program 13 times [2022-12-14 05:35:03,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:35:03,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026880526] [2022-12-14 05:35:03,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:35:03,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:35:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:35:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 05:35:03,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:35:03,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026880526] [2022-12-14 05:35:03,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026880526] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:35:03,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143705191] [2022-12-14 05:35:03,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:35:03,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:35:03,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:35:03,409 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:35:03,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 05:35:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:35:03,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 05:35:03,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:35:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 05:35:03,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:35:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 05:35:03,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143705191] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:35:03,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [683552945] [2022-12-14 05:35:03,521 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:35:03,521 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:35:03,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:35:03,521 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:35:03,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:35:03,567 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:35:03,644 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3736#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:35:03,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:35:03,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:35:03,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-12-14 05:35:03,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298713016] [2022-12-14 05:35:03,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:35:03,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 05:35:03,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:35:03,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 05:35:03,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-12-14 05:35:03,645 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:03,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:35:03,758 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-12-14 05:35:03,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:35:03,758 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 05:35:03,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:35:03,759 INFO L225 Difference]: With dead ends: 67 [2022-12-14 05:35:03,759 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 05:35:03,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:35:03,760 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:35:03,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 19 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:35:03,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 05:35:03,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2022-12-14 05:35:03,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-12-14 05:35:03,785 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 21 [2022-12-14 05:35:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:35:03,785 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-12-14 05:35:03,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:03,785 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-12-14 05:35:03,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 05:35:03,786 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:35:03,786 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 05:35:03,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 05:35:03,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 05:35:03,987 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:35:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:35:03,989 INFO L85 PathProgramCache]: Analyzing trace with hash -647325269, now seen corresponding path program 14 times [2022-12-14 05:35:03,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:35:03,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753911620] [2022-12-14 05:35:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:35:03,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:35:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:35:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 05:35:04,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:35:04,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753911620] [2022-12-14 05:35:04,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753911620] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:35:04,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788631831] [2022-12-14 05:35:04,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:35:04,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:35:04,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:35:04,219 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:35:04,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 05:35:04,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 05:35:04,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:35:04,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 05:35:04,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:35:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 05:35:04,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:35:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 05:35:04,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788631831] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:35:04,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [300027621] [2022-12-14 05:35:04,790 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:35:04,790 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:35:04,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:35:04,790 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:35:04,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:35:04,829 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:35:04,997 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4144#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:35:04,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:35:04,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:35:04,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-12-14 05:35:04,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963516600] [2022-12-14 05:35:04,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:35:04,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 05:35:04,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:35:04,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 05:35:04,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 05:35:04,999 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:10,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:35:10,252 INFO L93 Difference]: Finished difference Result 122 states and 144 transitions. [2022-12-14 05:35:10,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-14 05:35:10,252 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 05:35:10,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:35:10,253 INFO L225 Difference]: With dead ends: 122 [2022-12-14 05:35:10,253 INFO L226 Difference]: Without dead ends: 97 [2022-12-14 05:35:10,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1321, Invalid=7235, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 05:35:10,254 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 257 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:35:10,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 36 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:35:10,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-12-14 05:35:10,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 60. [2022-12-14 05:35:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 59 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2022-12-14 05:35:10,281 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 24 [2022-12-14 05:35:10,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:35:10,281 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2022-12-14 05:35:10,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:10,281 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2022-12-14 05:35:10,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 05:35:10,281 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:35:10,281 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 05:35:10,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 05:35:10,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 05:35:10,483 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:35:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:35:10,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1072107637, now seen corresponding path program 15 times [2022-12-14 05:35:10,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:35:10,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666399585] [2022-12-14 05:35:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:35:10,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:35:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:35:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 05:35:10,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:35:10,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666399585] [2022-12-14 05:35:10,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666399585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:35:10,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302268543] [2022-12-14 05:35:10,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:35:10,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:35:10,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:35:10,683 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:35:10,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 05:35:10,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:35:10,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:35:10,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 05:35:10,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:35:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 05:35:10,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:35:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 05:35:10,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302268543] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:35:10,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1666498084] [2022-12-14 05:35:10,812 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:35:10,812 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:35:10,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:35:10,813 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:35:10,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:35:10,853 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:35:10,942 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4757#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:35:10,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:35:10,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:35:10,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2022-12-14 05:35:10,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104780234] [2022-12-14 05:35:10,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:35:10,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 05:35:10,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:35:10,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 05:35:10,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:35:10,944 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:11,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:35:11,140 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2022-12-14 05:35:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 05:35:11,140 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 05:35:11,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:35:11,141 INFO L225 Difference]: With dead ends: 90 [2022-12-14 05:35:11,141 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 05:35:11,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:35:11,142 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:35:11,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:35:11,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 05:35:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2022-12-14 05:35:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:11,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2022-12-14 05:35:11,177 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 24 [2022-12-14 05:35:11,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:35:11,177 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2022-12-14 05:35:11,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:11,177 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2022-12-14 05:35:11,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 05:35:11,178 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:35:11,178 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 05:35:11,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 05:35:11,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:35:11,378 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:35:11,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:35:11,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1422218667, now seen corresponding path program 16 times [2022-12-14 05:35:11,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:35:11,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574999289] [2022-12-14 05:35:11,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:35:11,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:35:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:35:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 05:35:11,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:35:11,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574999289] [2022-12-14 05:35:11,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574999289] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:35:11,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667430286] [2022-12-14 05:35:11,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:35:11,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:35:11,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:35:11,640 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:35:11,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 05:35:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:35:11,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 05:35:11,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:35:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:35:11,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:35:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 05:35:12,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667430286] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:35:12,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2071315504] [2022-12-14 05:35:12,166 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:35:12,166 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:35:12,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:35:12,167 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:35:12,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:35:12,216 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:35:12,331 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5264#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:35:12,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:35:12,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:35:12,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 40 [2022-12-14 05:35:12,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254859691] [2022-12-14 05:35:12,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:35:12,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 05:35:12,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:35:12,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 05:35:12,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1524, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 05:35:12,332 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:15,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:35:15,090 INFO L93 Difference]: Finished difference Result 214 states and 251 transitions. [2022-12-14 05:35:15,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-14 05:35:15,090 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 states have internal predecessors, (56), 0 states have call successors, (0), 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 27 [2022-12-14 05:35:15,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:35:15,091 INFO L225 Difference]: With dead ends: 214 [2022-12-14 05:35:15,091 INFO L226 Difference]: Without dead ends: 185 [2022-12-14 05:35:15,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1440, Invalid=4880, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 05:35:15,093 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 167 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:35:15,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 18 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:35:15,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-12-14 05:35:15,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 60. [2022-12-14 05:35:15,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:15,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-12-14 05:35:15,125 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 27 [2022-12-14 05:35:15,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:35:15,125 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-12-14 05:35:15,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.4) internal successors, (56), 40 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:15,125 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-12-14 05:35:15,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 05:35:15,126 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:35:15,126 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 05:35:15,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 05:35:15,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:35:15,327 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:35:15,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:35:15,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1600690749, now seen corresponding path program 17 times [2022-12-14 05:35:15,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:35:15,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207067765] [2022-12-14 05:35:15,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:35:15,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:35:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:35:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 05:35:15,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:35:15,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207067765] [2022-12-14 05:35:15,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207067765] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:35:15,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087585563] [2022-12-14 05:35:15,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:35:15,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:35:15,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:35:15,532 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:35:15,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 05:35:15,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 05:35:15,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:35:15,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 05:35:15,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:35:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 05:35:15,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:35:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 05:35:15,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087585563] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:35:15,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1780472874] [2022-12-14 05:35:15,755 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:35:15,755 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:35:15,755 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:35:15,756 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:35:15,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:35:15,793 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:35:15,870 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6048#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:35:15,871 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:35:15,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:35:15,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2022-12-14 05:35:15,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773851901] [2022-12-14 05:35:15,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:35:15,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 05:35:15,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:35:15,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 05:35:15,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:35:15,872 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:16,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:35:16,101 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2022-12-14 05:35:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 05:35:16,102 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-14 05:35:16,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:35:16,102 INFO L225 Difference]: With dead ends: 101 [2022-12-14 05:35:16,102 INFO L226 Difference]: Without dead ends: 90 [2022-12-14 05:35:16,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:35:16,104 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:35:16,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:35:16,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-14 05:35:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2022-12-14 05:35:16,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 69 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-12-14 05:35:16,146 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 27 [2022-12-14 05:35:16,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:35:16,146 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-12-14 05:35:16,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-12-14 05:35:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 05:35:16,147 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:35:16,147 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 05:35:16,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-14 05:35:16,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 05:35:16,348 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:35:16,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:35:16,349 INFO L85 PathProgramCache]: Analyzing trace with hash -102855189, now seen corresponding path program 18 times [2022-12-14 05:35:16,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:35:16,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11210956] [2022-12-14 05:35:16,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:35:16,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:35:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:35:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 05:35:16,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:35:16,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11210956] [2022-12-14 05:35:16,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11210956] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:35:16,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323714837] [2022-12-14 05:35:16,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:35:16,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:35:16,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:35:16,581 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:35:16,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 05:35:16,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:35:16,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:35:16,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 05:35:16,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:35:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 05:35:16,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:35:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 05:35:17,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323714837] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:35:17,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1128498299] [2022-12-14 05:35:17,138 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:35:17,138 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:35:17,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:35:17,138 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:35:17,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:35:17,184 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:35:17,338 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6587#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:35:17,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:35:17,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:35:17,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 16] total 40 [2022-12-14 05:35:17,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143266856] [2022-12-14 05:35:17,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:35:17,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 05:35:17,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:35:17,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 05:35:17,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 05:35:17,339 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 40 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:22,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:35:22,187 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2022-12-14 05:35:22,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-14 05:35:22,187 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-14 05:35:22,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:35:22,188 INFO L225 Difference]: With dead ends: 134 [2022-12-14 05:35:22,188 INFO L226 Difference]: Without dead ends: 106 [2022-12-14 05:35:22,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=663, Invalid=5343, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 05:35:22,189 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 49 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:35:22,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 50 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:35:22,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-12-14 05:35:22,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2022-12-14 05:35:22,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.184782608695652) internal successors, (109), 92 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:22,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2022-12-14 05:35:22,254 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 28 [2022-12-14 05:35:22,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:35:22,254 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2022-12-14 05:35:22,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:22,254 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2022-12-14 05:35:22,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 05:35:22,254 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:35:22,255 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 05:35:22,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 05:35:22,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 05:35:22,456 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:35:22,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:35:22,457 INFO L85 PathProgramCache]: Analyzing trace with hash -520490741, now seen corresponding path program 19 times [2022-12-14 05:35:22,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:35:22,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878640423] [2022-12-14 05:35:22,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:35:22,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:35:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:35:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 05:35:22,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:35:22,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878640423] [2022-12-14 05:35:22,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878640423] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:35:22,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920861367] [2022-12-14 05:35:22,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:35:22,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:35:22,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:35:22,689 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:35:22,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 05:35:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:35:22,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 05:35:22,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:35:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 05:35:22,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:35:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 05:35:22,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920861367] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:35:22,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1483918807] [2022-12-14 05:35:22,812 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:35:22,812 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:35:22,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:35:22,812 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:35:22,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:35:22,852 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:35:22,943 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7286#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:35:22,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:35:22,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:35:22,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 13 [2022-12-14 05:35:22,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515122770] [2022-12-14 05:35:22,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:35:22,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 05:35:22,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:35:22,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 05:35:22,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:35:22,944 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:23,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:35:23,249 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2022-12-14 05:35:23,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:35:23,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-14 05:35:23,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:35:23,250 INFO L225 Difference]: With dead ends: 131 [2022-12-14 05:35:23,250 INFO L226 Difference]: Without dead ends: 119 [2022-12-14 05:35:23,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-12-14 05:35:23,251 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:35:23,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:35:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-12-14 05:35:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 102. [2022-12-14 05:35:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 101 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:23,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2022-12-14 05:35:23,324 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 30 [2022-12-14 05:35:23,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:35:23,324 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2022-12-14 05:35:23,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2022-12-14 05:35:23,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 05:35:23,324 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:35:23,324 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 05:35:23,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-14 05:35:23,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:35:23,525 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:35:23,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:35:23,526 INFO L85 PathProgramCache]: Analyzing trace with hash -2032401620, now seen corresponding path program 20 times [2022-12-14 05:35:23,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:35:23,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442326878] [2022-12-14 05:35:23,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:35:23,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:35:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:35:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 05:35:23,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:35:23,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442326878] [2022-12-14 05:35:23,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442326878] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:35:23,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972351839] [2022-12-14 05:35:23,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:35:23,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:35:23,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:35:23,782 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:35:23,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 05:35:23,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 05:35:23,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:35:23,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 05:35:23,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:35:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 05:35:24,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:35:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 05:35:24,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972351839] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:35:24,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1630620283] [2022-12-14 05:35:24,996 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:35:24,996 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:35:24,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:35:24,996 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:35:24,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:35:25,036 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:35:25,226 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7980#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:35:25,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:35:25,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:35:25,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 56 [2022-12-14 05:35:25,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771898056] [2022-12-14 05:35:25,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:35:25,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-14 05:35:25,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:35:25,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-14 05:35:25,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=619, Invalid=2921, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 05:35:25,229 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 56 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:01,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:36:01,100 INFO L93 Difference]: Finished difference Result 214 states and 254 transitions. [2022-12-14 05:36:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-12-14 05:36:01,101 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-12-14 05:36:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:36:01,101 INFO L225 Difference]: With dead ends: 214 [2022-12-14 05:36:01,101 INFO L226 Difference]: Without dead ends: 160 [2022-12-14 05:36:01,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5922 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=3691, Invalid=22069, Unknown=0, NotChecked=0, Total=25760 [2022-12-14 05:36:01,105 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 479 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:36:01,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 66 Invalid, 2231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 05:36:01,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-12-14 05:36:01,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 101. [2022-12-14 05:36:01,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.2) internal successors, (120), 100 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:01,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2022-12-14 05:36:01,188 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 31 [2022-12-14 05:36:01,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:36:01,188 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2022-12-14 05:36:01,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:01,188 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2022-12-14 05:36:01,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 05:36:01,188 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:36:01,189 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1] [2022-12-14 05:36:01,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 05:36:01,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:36:01,390 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:36:01,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:36:01,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1257158851, now seen corresponding path program 21 times [2022-12-14 05:36:01,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:36:01,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103820120] [2022-12-14 05:36:01,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:36:01,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:36:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:36:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 05:36:01,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:36:01,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103820120] [2022-12-14 05:36:01,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103820120] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:36:01,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140812762] [2022-12-14 05:36:01,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:36:01,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:36:01,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:36:01,647 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:36:01,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 05:36:01,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:36:01,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:36:01,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 05:36:01,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:36:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 05:36:01,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:36:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 05:36:01,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140812762] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:36:01,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2106558465] [2022-12-14 05:36:01,771 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:36:01,771 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:36:01,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:36:01,771 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:36:01,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:36:01,810 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:36:01,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9010#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:36:01,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:36:01,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:36:01,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2022-12-14 05:36:01,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644134038] [2022-12-14 05:36:01,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:36:01,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 05:36:01,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:36:01,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 05:36:01,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-12-14 05:36:01,902 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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) [2022-12-14 05:36:02,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:36:02,231 INFO L93 Difference]: Finished difference Result 140 states and 161 transitions. [2022-12-14 05:36:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 05:36:02,231 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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) Word has length 33 [2022-12-14 05:36:02,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:36:02,232 INFO L225 Difference]: With dead ends: 140 [2022-12-14 05:36:02,232 INFO L226 Difference]: Without dead ends: 127 [2022-12-14 05:36:02,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-12-14 05:36:02,232 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:36:02,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 25 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:36:02,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-14 05:36:02,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 111. [2022-12-14 05:36:02,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.190909090909091) internal successors, (131), 110 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:02,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2022-12-14 05:36:02,325 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 33 [2022-12-14 05:36:02,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:36:02,325 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2022-12-14 05:36:02,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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) [2022-12-14 05:36:02,325 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2022-12-14 05:36:02,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 05:36:02,326 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:36:02,326 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 05:36:02,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 05:36:02,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 05:36:02,527 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:36:02,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:36:02,528 INFO L85 PathProgramCache]: Analyzing trace with hash -747966284, now seen corresponding path program 22 times [2022-12-14 05:36:02,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:36:02,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951354516] [2022-12-14 05:36:02,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:36:02,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:36:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:36:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 05:36:02,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:36:02,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951354516] [2022-12-14 05:36:02,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951354516] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:36:02,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817966300] [2022-12-14 05:36:02,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:36:02,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:36:02,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:36:02,885 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:36:02,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 05:36:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:36:02,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-14 05:36:02,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:36:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:36:03,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:36:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 05:36:03,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817966300] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:36:03,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [365360719] [2022-12-14 05:36:03,648 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:36:03,648 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:36:03,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:36:03,648 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:36:03,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:36:03,686 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:36:03,838 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9753#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:36:03,839 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:36:03,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:36:03,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 20] total 51 [2022-12-14 05:36:03,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817747502] [2022-12-14 05:36:03,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:36:03,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 05:36:03,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:36:03,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 05:36:03,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=2411, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 05:36:03,840 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 51 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 51 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:13,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:36:13,564 INFO L93 Difference]: Finished difference Result 424 states and 484 transitions. [2022-12-14 05:36:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-12-14 05:36:13,565 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 51 states have internal predecessors, (69), 0 states have call successors, (0), 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 34 [2022-12-14 05:36:13,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:36:13,565 INFO L225 Difference]: With dead ends: 424 [2022-12-14 05:36:13,565 INFO L226 Difference]: Without dead ends: 395 [2022-12-14 05:36:13,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3570 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=2892, Invalid=8880, Unknown=0, NotChecked=0, Total=11772 [2022-12-14 05:36:13,567 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 309 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:36:13,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 42 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 05:36:13,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-12-14 05:36:13,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 114. [2022-12-14 05:36:13,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 113 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 134 transitions. [2022-12-14 05:36:13,673 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 134 transitions. Word has length 34 [2022-12-14 05:36:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:36:13,674 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 134 transitions. [2022-12-14 05:36:13,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 51 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:13,674 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 134 transitions. [2022-12-14 05:36:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 05:36:13,674 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:36:13,674 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1] [2022-12-14 05:36:13,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 05:36:13,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 05:36:13,876 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:36:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:36:13,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1218466763, now seen corresponding path program 23 times [2022-12-14 05:36:13,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:36:13,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030703043] [2022-12-14 05:36:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:36:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:36:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:36:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 05:36:14,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:36:14,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030703043] [2022-12-14 05:36:14,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030703043] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:36:14,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765668471] [2022-12-14 05:36:14,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:36:14,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:36:14,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:36:14,207 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:36:14,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 05:36:14,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 05:36:14,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:36:14,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 05:36:14,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:36:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 05:36:14,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:36:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 05:36:15,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765668471] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:36:15,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1885431293] [2022-12-14 05:36:15,326 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:36:15,326 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:36:15,326 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:36:15,326 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:36:15,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:36:15,367 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:36:15,588 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11192#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:36:15,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:36:15,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:36:15,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 53 [2022-12-14 05:36:15,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615062006] [2022-12-14 05:36:15,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:36:15,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 05:36:15,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:36:15,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 05:36:15,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=2804, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 05:36:15,590 INFO L87 Difference]: Start difference. First operand 114 states and 134 transitions. Second operand has 53 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:29,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:36:29,672 INFO L93 Difference]: Finished difference Result 167 states and 197 transitions. [2022-12-14 05:36:29,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-14 05:36:29,673 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 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 35 [2022-12-14 05:36:29,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:36:29,673 INFO L225 Difference]: With dead ends: 167 [2022-12-14 05:36:29,673 INFO L226 Difference]: Without dead ends: 142 [2022-12-14 05:36:29,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=742, Invalid=5110, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 05:36:29,674 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 32 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:36:29,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 52 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 05:36:29,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-12-14 05:36:29,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2022-12-14 05:36:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1693548387096775) internal successors, (145), 124 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 145 transitions. [2022-12-14 05:36:29,793 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 145 transitions. Word has length 35 [2022-12-14 05:36:29,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:36:29,793 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 145 transitions. [2022-12-14 05:36:29,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:29,794 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 145 transitions. [2022-12-14 05:36:29,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 05:36:29,794 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:36:29,794 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 05:36:29,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 05:36:29,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 05:36:29,995 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:36:29,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:36:29,996 INFO L85 PathProgramCache]: Analyzing trace with hash 139580043, now seen corresponding path program 24 times [2022-12-14 05:36:29,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:36:29,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733165450] [2022-12-14 05:36:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:36:29,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:36:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:36:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 05:36:30,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:36:30,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733165450] [2022-12-14 05:36:30,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733165450] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:36:30,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350522026] [2022-12-14 05:36:30,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:36:30,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:36:30,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:36:30,307 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:36:30,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 05:36:30,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:36:30,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:36:30,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 05:36:30,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:36:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 05:36:30,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:36:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 05:36:30,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350522026] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:36:30,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [264521809] [2022-12-14 05:36:30,453 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:36:30,453 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:36:30,453 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:36:30,453 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:36:30,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:36:30,492 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:36:30,607 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12031#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:36:30,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:36:30,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:36:30,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 15 [2022-12-14 05:36:30,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675710311] [2022-12-14 05:36:30,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:36:30,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 05:36:30,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:36:30,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 05:36:30,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-12-14 05:36:30,608 INFO L87 Difference]: Start difference. First operand 125 states and 145 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:31,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:36:31,101 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2022-12-14 05:36:31,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 05:36:31,101 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-12-14 05:36:31,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:36:31,102 INFO L225 Difference]: With dead ends: 168 [2022-12-14 05:36:31,102 INFO L226 Difference]: Without dead ends: 154 [2022-12-14 05:36:31,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:36:31,103 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:36:31,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:36:31,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-12-14 05:36:31,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 136. [2022-12-14 05:36:31,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.162962962962963) internal successors, (157), 135 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:31,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 157 transitions. [2022-12-14 05:36:31,239 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 157 transitions. Word has length 36 [2022-12-14 05:36:31,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:36:31,239 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 157 transitions. [2022-12-14 05:36:31,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:31,239 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 157 transitions. [2022-12-14 05:36:31,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 05:36:31,239 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:36:31,239 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 9, 1, 1, 1, 1, 1, 1] [2022-12-14 05:36:31,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 05:36:31,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 05:36:31,440 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:36:31,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:36:31,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1868330580, now seen corresponding path program 25 times [2022-12-14 05:36:31,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:36:31,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279036165] [2022-12-14 05:36:31,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:36:31,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:36:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:36:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 05:36:31,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:36:31,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279036165] [2022-12-14 05:36:31,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279036165] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:36:31,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134735799] [2022-12-14 05:36:31,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:36:31,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:36:31,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:36:31,863 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:36:31,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 05:36:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:36:31,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 05:36:31,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:36:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:36:32,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:36:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-14 05:36:32,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134735799] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:36:32,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [987277020] [2022-12-14 05:36:32,719 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:36:32,719 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:36:32,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:36:32,719 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:36:32,719 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:36:32,761 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:36:32,953 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12903#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:36:32,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:36:32,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:36:32,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 22] total 56 [2022-12-14 05:36:32,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738880099] [2022-12-14 05:36:32,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:36:32,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-14 05:36:32,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:36:32,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-14 05:36:32,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=659, Invalid=2881, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 05:36:32,954 INFO L87 Difference]: Start difference. First operand 136 states and 157 transitions. Second operand has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:49,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:36:49,741 INFO L93 Difference]: Finished difference Result 536 states and 606 transitions. [2022-12-14 05:36:49,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-12-14 05:36:49,741 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 0 states have call successors, (0), 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 37 [2022-12-14 05:36:49,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:36:49,742 INFO L225 Difference]: With dead ends: 536 [2022-12-14 05:36:49,742 INFO L226 Difference]: Without dead ends: 481 [2022-12-14 05:36:49,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6102 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=4325, Invalid=13765, Unknown=0, NotChecked=0, Total=18090 [2022-12-14 05:36:49,744 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 277 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:36:49,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 51 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 05:36:49,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-12-14 05:36:49,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 124. [2022-12-14 05:36:49,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 123 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:49,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2022-12-14 05:36:49,878 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 37 [2022-12-14 05:36:49,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:36:49,879 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2022-12-14 05:36:49,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:49,879 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2022-12-14 05:36:49,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 05:36:49,879 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:36:49,879 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 05:36:49,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-14 05:36:50,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 05:36:50,081 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:36:50,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:36:50,081 INFO L85 PathProgramCache]: Analyzing trace with hash -244089781, now seen corresponding path program 26 times [2022-12-14 05:36:50,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:36:50,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891779611] [2022-12-14 05:36:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:36:50,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:36:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:36:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 05:36:50,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:36:50,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891779611] [2022-12-14 05:36:50,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891779611] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:36:50,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433903155] [2022-12-14 05:36:50,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:36:50,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:36:50,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:36:50,468 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:36:50,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 05:36:51,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 05:36:51,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:36:51,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-14 05:36:51,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:36:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 05:36:51,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:36:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 05:36:52,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433903155] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:36:52,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1509502809] [2022-12-14 05:36:52,285 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:36:52,285 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:36:52,286 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:36:52,286 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:36:52,286 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:36:52,324 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:36:52,550 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14652#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:36:52,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:36:52,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:36:52,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 58 [2022-12-14 05:36:52,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804085729] [2022-12-14 05:36:52,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:36:52,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-14 05:36:52,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:36:52,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-14 05:36:52,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=3335, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 05:36:52,551 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand has 58 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:37:18,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:37:18,507 INFO L93 Difference]: Finished difference Result 181 states and 211 transitions. [2022-12-14 05:37:18,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-14 05:37:18,508 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 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 38 [2022-12-14 05:37:18,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:37:18,509 INFO L225 Difference]: With dead ends: 181 [2022-12-14 05:37:18,509 INFO L226 Difference]: Without dead ends: 154 [2022-12-14 05:37:18,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=864, Invalid=6108, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 05:37:18,510 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:37:18,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 58 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1713 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 05:37:18,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-12-14 05:37:18,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 136. [2022-12-14 05:37:18,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 135 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:37:18,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 155 transitions. [2022-12-14 05:37:18,722 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 155 transitions. Word has length 38 [2022-12-14 05:37:18,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:37:18,722 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 155 transitions. [2022-12-14 05:37:18,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:37:18,722 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 155 transitions. [2022-12-14 05:37:18,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 05:37:18,723 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:37:18,723 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1] [2022-12-14 05:37:18,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-14 05:37:18,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:37:18,924 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:37:18,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:37:18,924 INFO L85 PathProgramCache]: Analyzing trace with hash -503387197, now seen corresponding path program 27 times [2022-12-14 05:37:18,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:37:18,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740994492] [2022-12-14 05:37:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:37:18,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:37:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:37:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 05:37:19,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:37:19,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740994492] [2022-12-14 05:37:19,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740994492] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:37:19,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683984183] [2022-12-14 05:37:19,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:37:19,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:37:19,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:37:19,247 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:37:19,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 05:37:19,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:37:19,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:37:19,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-14 05:37:19,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:37:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 05:37:19,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:37:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 05:37:19,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683984183] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:37:19,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [247112604] [2022-12-14 05:37:19,404 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:37:19,404 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:37:19,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:37:19,404 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:37:19,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:37:19,440 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:37:19,550 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15564#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:37:19,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:37:19,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:37:19,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 16 [2022-12-14 05:37:19,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313603283] [2022-12-14 05:37:19,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:37:19,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 05:37:19,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:37:19,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 05:37:19,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:37:19,551 INFO L87 Difference]: Start difference. First operand 136 states and 155 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:37:20,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:37:20,145 INFO L93 Difference]: Finished difference Result 183 states and 204 transitions. [2022-12-14 05:37:20,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 05:37:20,146 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-12-14 05:37:20,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:37:20,146 INFO L225 Difference]: With dead ends: 183 [2022-12-14 05:37:20,146 INFO L226 Difference]: Without dead ends: 168 [2022-12-14 05:37:20,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2022-12-14 05:37:20,147 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:37:20,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 31 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:37:20,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-12-14 05:37:20,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 148. [2022-12-14 05:37:20,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.1428571428571428) internal successors, (168), 147 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:37:20,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 168 transitions. [2022-12-14 05:37:20,315 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 168 transitions. Word has length 39 [2022-12-14 05:37:20,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:37:20,315 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 168 transitions. [2022-12-14 05:37:20,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:37:20,315 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 168 transitions. [2022-12-14 05:37:20,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 05:37:20,316 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:37:20,316 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 05:37:20,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-14 05:37:20,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:37:20,517 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:37:20,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:37:20,518 INFO L85 PathProgramCache]: Analyzing trace with hash 689948084, now seen corresponding path program 28 times [2022-12-14 05:37:20,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:37:20,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56830884] [2022-12-14 05:37:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:37:20,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:37:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:37:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 05:37:20,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:37:20,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56830884] [2022-12-14 05:37:20,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56830884] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:37:20,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327753441] [2022-12-14 05:37:20,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:37:20,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:37:20,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:37:20,955 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:37:20,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 05:37:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:37:21,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-14 05:37:21,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:37:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:37:21,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:37:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 05:37:22,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327753441] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:37:22,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1637314974] [2022-12-14 05:37:22,130 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:37:22,130 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:37:22,130 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:37:22,130 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:37:22,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:37:22,166 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:37:22,354 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16513#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:37:22,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:37:22,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:37:22,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 24] total 61 [2022-12-14 05:37:22,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745891884] [2022-12-14 05:37:22,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:37:22,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-14 05:37:22,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:37:22,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-14 05:37:22,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=767, Invalid=3393, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 05:37:22,356 INFO L87 Difference]: Start difference. First operand 148 states and 168 transitions. Second operand has 61 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:37:52,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:37:52,548 INFO L93 Difference]: Finished difference Result 640 states and 718 transitions. [2022-12-14 05:37:52,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-12-14 05:37:52,548 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-14 05:37:52,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:37:52,549 INFO L225 Difference]: With dead ends: 640 [2022-12-14 05:37:52,550 INFO L226 Difference]: Without dead ends: 577 [2022-12-14 05:37:52,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8156 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=5609, Invalid=17647, Unknown=0, NotChecked=0, Total=23256 [2022-12-14 05:37:52,551 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 420 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1838 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:37:52,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 84 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1838 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-14 05:37:52,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-12-14 05:37:52,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 130. [2022-12-14 05:37:52,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.1472868217054264) internal successors, (148), 129 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:37:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2022-12-14 05:37:52,719 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 40 [2022-12-14 05:37:52,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:37:52,719 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2022-12-14 05:37:52,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:37:52,720 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2022-12-14 05:37:52,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 05:37:52,720 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:37:52,720 INFO L195 NwaCegarLoop]: trace histogram [17, 13, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 05:37:52,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 05:37:52,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-14 05:37:52,921 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:37:52,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:37:52,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1172425347, now seen corresponding path program 29 times [2022-12-14 05:37:52,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:37:52,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862946216] [2022-12-14 05:37:52,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:37:52,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:37:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:37:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 05:37:53,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:37:53,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862946216] [2022-12-14 05:37:53,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862946216] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:37:53,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659977968] [2022-12-14 05:37:53,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:37:53,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:37:53,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:37:53,252 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:37:53,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 05:37:53,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 05:37:53,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:37:53,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 05:37:53,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:37:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 48 proven. 30 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-12-14 05:37:54,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:37:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-12-14 05:37:55,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659977968] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:37:55,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [93947844] [2022-12-14 05:37:55,053 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:37:55,053 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:37:55,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:37:55,053 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:37:55,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:37:55,091 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:37:55,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18518#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:37:55,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:37:55,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:37:55,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 14] total 49 [2022-12-14 05:37:55,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664607077] [2022-12-14 05:37:55,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:37:55,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 05:37:55,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:37:55,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 05:37:55,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2493, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 05:37:55,265 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:15,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:38:15,488 INFO L93 Difference]: Finished difference Result 273 states and 311 transitions. [2022-12-14 05:38:15,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-12-14 05:38:15,489 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 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 41 [2022-12-14 05:38:15,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:38:15,490 INFO L225 Difference]: With dead ends: 273 [2022-12-14 05:38:15,490 INFO L226 Difference]: Without dead ends: 234 [2022-12-14 05:38:15,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5661 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=1633, Invalid=22237, Unknown=0, NotChecked=0, Total=23870 [2022-12-14 05:38:15,492 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 115 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3072 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 3242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 3072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:38:15,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 52 Invalid, 3242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 3072 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 05:38:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-12-14 05:38:15,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 181. [2022-12-14 05:38:15,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.1166666666666667) internal successors, (201), 180 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 201 transitions. [2022-12-14 05:38:15,743 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 201 transitions. Word has length 41 [2022-12-14 05:38:15,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:38:15,743 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 201 transitions. [2022-12-14 05:38:15,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:15,743 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 201 transitions. [2022-12-14 05:38:15,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 05:38:15,743 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:38:15,743 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1] [2022-12-14 05:38:15,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-14 05:38:15,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-14 05:38:15,944 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:38:15,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:38:15,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1571515381, now seen corresponding path program 30 times [2022-12-14 05:38:15,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:38:15,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084466176] [2022-12-14 05:38:15,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:38:15,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:38:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-14 05:38:16,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:38:16,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084466176] [2022-12-14 05:38:16,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084466176] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:38:16,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960031697] [2022-12-14 05:38:16,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:38:16,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:38:16,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:38:16,330 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:38:16,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 05:38:16,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:38:16,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:38:16,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-14 05:38:16,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:38:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-14 05:38:16,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:38:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-14 05:38:16,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960031697] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:38:16,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [49027866] [2022-12-14 05:38:16,491 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:38:16,491 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:38:16,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:38:16,491 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:38:16,491 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:38:16,531 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:38:16,635 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19883#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:38:16,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:38:16,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:38:16,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 17 [2022-12-14 05:38:16,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892579200] [2022-12-14 05:38:16,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:38:16,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 05:38:16,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:38:16,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 05:38:16,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2022-12-14 05:38:16,637 INFO L87 Difference]: Start difference. First operand 181 states and 201 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:17,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:38:17,639 INFO L93 Difference]: Finished difference Result 301 states and 328 transitions. [2022-12-14 05:38:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 05:38:17,639 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-12-14 05:38:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:38:17,641 INFO L225 Difference]: With dead ends: 301 [2022-12-14 05:38:17,641 INFO L226 Difference]: Without dead ends: 285 [2022-12-14 05:38:17,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2022-12-14 05:38:17,641 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:38:17,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 61 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:38:17,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-12-14 05:38:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 195. [2022-12-14 05:38:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.1185567010309279) internal successors, (217), 194 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 217 transitions. [2022-12-14 05:38:17,925 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 217 transitions. Word has length 42 [2022-12-14 05:38:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:38:17,925 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 217 transitions. [2022-12-14 05:38:17,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 217 transitions. [2022-12-14 05:38:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 05:38:17,926 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:38:17,926 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2022-12-14 05:38:17,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 05:38:18,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:38:18,127 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:38:18,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:38:18,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1529432267, now seen corresponding path program 31 times [2022-12-14 05:38:18,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:38:18,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255739646] [2022-12-14 05:38:18,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:38:18,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:38:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-14 05:38:18,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:38:18,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255739646] [2022-12-14 05:38:18,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255739646] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:38:18,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546521143] [2022-12-14 05:38:18,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:38:18,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:38:18,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:38:18,531 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:38:18,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 05:38:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:18,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-14 05:38:18,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:38:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-14 05:38:18,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:38:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-14 05:38:19,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546521143] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:38:19,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1237596914] [2022-12-14 05:38:19,903 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:38:19,903 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:38:19,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:38:19,904 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:38:19,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:38:19,939 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:38:20,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21186#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:38:20,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:38:20,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:38:20,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 28] total 67 [2022-12-14 05:38:20,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898319664] [2022-12-14 05:38:20,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:38:20,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-14 05:38:20,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:38:20,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-14 05:38:20,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=4241, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 05:38:20,157 INFO L87 Difference]: Start difference. First operand 195 states and 217 transitions. Second operand has 67 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:41,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 05:38:43,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 05:39:00,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 05:39:01,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 05:39:47,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:47,140 INFO L93 Difference]: Finished difference Result 733 states and 804 transitions. [2022-12-14 05:39:47,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-12-14 05:39:47,141 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 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 43 [2022-12-14 05:39:47,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:47,144 INFO L225 Difference]: With dead ends: 733 [2022-12-14 05:39:47,144 INFO L226 Difference]: Without dead ends: 680 [2022-12-14 05:39:47,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8266 ImplicationChecksByTransitivity, 68.4s TimeCoverageRelationStatistics Valid=5340, Invalid=20420, Unknown=0, NotChecked=0, Total=25760 [2022-12-14 05:39:47,146 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 497 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 292 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:47,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 85 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1032 Invalid, 2 Unknown, 0 Unchecked, 18.2s Time] [2022-12-14 05:39:47,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-12-14 05:39:47,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 175. [2022-12-14 05:39:47,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.1551724137931034) internal successors, (201), 174 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:47,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 201 transitions. [2022-12-14 05:39:47,426 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 201 transitions. Word has length 43 [2022-12-14 05:39:47,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:47,426 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 201 transitions. [2022-12-14 05:39:47,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:47,426 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 201 transitions. [2022-12-14 05:39:47,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 05:39:47,426 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:47,426 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1] [2022-12-14 05:39:47,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 05:39:47,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:39:47,628 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:39:47,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:47,629 INFO L85 PathProgramCache]: Analyzing trace with hash -109889653, now seen corresponding path program 32 times [2022-12-14 05:39:47,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:39:47,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690834612] [2022-12-14 05:39:47,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:39:47,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:39:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:39:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 05:39:48,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:39:48,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690834612] [2022-12-14 05:39:48,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690834612] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:39:48,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067400394] [2022-12-14 05:39:48,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:39:48,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:39:48,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:39:48,020 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:39:48,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 05:39:50,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-14 05:39:50,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:39:50,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 80 conjunts are in the unsatisfiable core [2022-12-14 05:39:50,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:39:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 05:39:50,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:39:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 05:39:51,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067400394] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:39:51,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1797882583] [2022-12-14 05:39:51,619 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:39:51,619 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:39:51,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:39:51,619 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:39:51,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:39:51,658 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:39:51,933 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23513#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:39:51,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:39:51,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:39:51,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 68 [2022-12-14 05:39:51,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92527568] [2022-12-14 05:39:51,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:39:51,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 05:39:51,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:39:51,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 05:39:51,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=4535, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 05:39:51,935 INFO L87 Difference]: Start difference. First operand 175 states and 201 transitions. Second operand has 68 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:40:08,330 WARN L233 SmtUtils]: Spent 9.51s on a formula simplification. DAG size of input: 72 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:40:18,439 WARN L233 SmtUtils]: Spent 5.26s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:40:33,840 WARN L233 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 71 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:40:37,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 05:40:38,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 05:41:04,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:41:04,908 INFO L93 Difference]: Finished difference Result 313 states and 360 transitions. [2022-12-14 05:41:04,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-14 05:41:04,908 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 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 44 [2022-12-14 05:41:04,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:41:04,909 INFO L225 Difference]: With dead ends: 313 [2022-12-14 05:41:04,909 INFO L226 Difference]: Without dead ends: 218 [2022-12-14 05:41:04,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 64.4s TimeCoverageRelationStatistics Valid=885, Invalid=6425, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 05:41:04,910 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:41:04,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 72 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2266 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2022-12-14 05:41:04,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-12-14 05:41:05,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 196. [2022-12-14 05:41:05,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.1487179487179486) internal successors, (224), 195 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:41:05,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 224 transitions. [2022-12-14 05:41:05,212 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 224 transitions. Word has length 44 [2022-12-14 05:41:05,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:41:05,212 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 224 transitions. [2022-12-14 05:41:05,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:41:05,212 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 224 transitions. [2022-12-14 05:41:05,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 05:41:05,213 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:41:05,213 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1] [2022-12-14 05:41:05,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-14 05:41:05,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-14 05:41:05,414 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:41:05,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:41:05,415 INFO L85 PathProgramCache]: Analyzing trace with hash -860619069, now seen corresponding path program 33 times [2022-12-14 05:41:05,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:41:05,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642307955] [2022-12-14 05:41:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:41:05,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:41:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:41:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 05:41:05,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:41:05,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642307955] [2022-12-14 05:41:05,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642307955] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:41:05,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158597303] [2022-12-14 05:41:05,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:41:05,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:41:05,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:41:05,808 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:41:05,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 05:41:05,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:41:05,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:41:05,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 05:41:05,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:41:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 05:41:05,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:41:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 05:41:05,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158597303] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:41:05,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2074840164] [2022-12-14 05:41:05,994 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:41:05,994 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:41:05,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:41:05,995 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:41:05,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:41:06,043 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:41:06,186 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24831#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:41:06,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:41:06,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:41:06,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 18 [2022-12-14 05:41:06,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375345308] [2022-12-14 05:41:06,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:41:06,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 05:41:06,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:41:06,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 05:41:06,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2022-12-14 05:41:06,187 INFO L87 Difference]: Start difference. First operand 196 states and 224 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:41:07,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:41:07,390 INFO L93 Difference]: Finished difference Result 322 states and 356 transitions. [2022-12-14 05:41:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 05:41:07,390 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 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 45 [2022-12-14 05:41:07,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:41:07,391 INFO L225 Difference]: With dead ends: 322 [2022-12-14 05:41:07,391 INFO L226 Difference]: Without dead ends: 305 [2022-12-14 05:41:07,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2022-12-14 05:41:07,392 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:41:07,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 62 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:41:07,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-12-14 05:41:07,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 210. [2022-12-14 05:41:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.1483253588516746) internal successors, (240), 209 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:41:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 240 transitions. [2022-12-14 05:41:07,820 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 240 transitions. Word has length 45 [2022-12-14 05:41:07,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:41:07,820 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 240 transitions. [2022-12-14 05:41:07,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:41:07,820 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 240 transitions. [2022-12-14 05:41:07,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 05:41:07,821 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:41:07,821 INFO L195 NwaCegarLoop]: trace histogram [19, 15, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 05:41:07,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 05:41:08,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-14 05:41:08,021 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:41:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:41:08,022 INFO L85 PathProgramCache]: Analyzing trace with hash -868692605, now seen corresponding path program 34 times [2022-12-14 05:41:08,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:41:08,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608796791] [2022-12-14 05:41:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:41:08,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:41:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:41:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-14 05:41:08,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:41:08,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608796791] [2022-12-14 05:41:08,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608796791] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:41:08,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546590154] [2022-12-14 05:41:08,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:41:08,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:41:08,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:41:08,590 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:41:08,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 05:41:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:41:08,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-14 05:41:08,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:41:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-14 05:41:08,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:41:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 64 proven. 56 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-12-14 05:41:09,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546590154] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:41:09,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1208232589] [2022-12-14 05:41:09,678 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:41:09,678 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:41:09,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:41:09,679 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:41:09,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:41:09,715 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:41:09,886 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26217#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:41:09,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:41:09,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:41:09,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 18] total 54 [2022-12-14 05:41:09,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776035351] [2022-12-14 05:41:09,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:41:09,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 05:41:09,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:41:09,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 05:41:09,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=2982, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 05:41:09,888 INFO L87 Difference]: Start difference. First operand 210 states and 240 transitions. Second operand has 54 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:41:55,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:41:55,720 INFO L93 Difference]: Finished difference Result 320 states and 369 transitions. [2022-12-14 05:41:55,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-12-14 05:41:55,720 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-12-14 05:41:55,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:41:55,721 INFO L225 Difference]: With dead ends: 320 [2022-12-14 05:41:55,721 INFO L226 Difference]: Without dead ends: 274 [2022-12-14 05:41:55,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6070 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=1824, Invalid=21738, Unknown=0, NotChecked=0, Total=23562 [2022-12-14 05:41:55,722 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 109 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 3357 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 3525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 3357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:41:55,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 68 Invalid, 3525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 3357 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 05:41:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-12-14 05:41:56,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 238. [2022-12-14 05:41:56,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.130801687763713) internal successors, (268), 237 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:41:56,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 268 transitions. [2022-12-14 05:41:56,169 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 268 transitions. Word has length 47 [2022-12-14 05:41:56,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:41:56,169 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 268 transitions. [2022-12-14 05:41:56,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:41:56,169 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 268 transitions. [2022-12-14 05:41:56,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 05:41:56,169 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:41:56,169 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1] [2022-12-14 05:41:56,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-14 05:41:56,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-14 05:41:56,371 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:41:56,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:41:56,371 INFO L85 PathProgramCache]: Analyzing trace with hash -356283211, now seen corresponding path program 35 times [2022-12-14 05:41:56,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:41:56,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517266021] [2022-12-14 05:41:56,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:41:56,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:41:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:41:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-12-14 05:41:56,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:41:56,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517266021] [2022-12-14 05:41:56,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517266021] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:41:56,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986011334] [2022-12-14 05:41:56,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:41:56,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:41:56,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:41:56,844 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:41:56,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 05:41:58,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-14 05:41:58,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:41:58,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-14 05:41:58,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:41:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-12-14 05:41:58,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:41:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-12-14 05:41:59,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986011334] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:41:59,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1928874571] [2022-12-14 05:41:59,556 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:41:59,556 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:41:59,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:41:59,556 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:41:59,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:41:59,594 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:41:59,809 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27864#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:41:59,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:41:59,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:41:59,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 73 [2022-12-14 05:41:59,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329282924] [2022-12-14 05:41:59,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:41:59,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-14 05:41:59,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:41:59,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-14 05:41:59,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=648, Invalid=5204, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 05:41:59,810 INFO L87 Difference]: Start difference. First operand 238 states and 268 transitions. Second operand has 73 states, 73 states have (on average 1.095890410958904) internal successors, (80), 73 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:42:20,276 WARN L233 SmtUtils]: Spent 7.90s on a formula simplification. DAG size of input: 77 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:42:37,142 WARN L233 SmtUtils]: Spent 10.00s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:43:02,181 WARN L233 SmtUtils]: Spent 11.63s on a formula simplification. DAG size of input: 76 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:43:13,950 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 71 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:43:17,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 05:43:30,022 WARN L233 SmtUtils]: Spent 6.85s on a formula simplification. DAG size of input: 66 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:43:45,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:45,184 INFO L93 Difference]: Finished difference Result 339 states and 385 transitions. [2022-12-14 05:43:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-12-14 05:43:45,184 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.095890410958904) internal successors, (80), 73 states have internal predecessors, (80), 0 states have call successors, (0), 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 47 [2022-12-14 05:43:45,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:45,185 INFO L225 Difference]: With dead ends: 339 [2022-12-14 05:43:45,186 INFO L226 Difference]: Without dead ends: 266 [2022-12-14 05:43:45,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 99.7s TimeCoverageRelationStatistics Valid=1284, Invalid=9636, Unknown=0, NotChecked=0, Total=10920 [2022-12-14 05:43:45,187 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 58 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 2937 mSolverCounterSat, 71 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 3009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2937 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:45,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 76 Invalid, 3009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2937 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2022-12-14 05:43:45,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-12-14 05:43:45,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 243. [2022-12-14 05:43:45,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.1198347107438016) internal successors, (271), 242 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 271 transitions. [2022-12-14 05:43:45,598 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 271 transitions. Word has length 47 [2022-12-14 05:43:45,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:45,599 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 271 transitions. [2022-12-14 05:43:45,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.095890410958904) internal successors, (80), 73 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 271 transitions. [2022-12-14 05:43:45,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 05:43:45,599 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:45,600 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1] [2022-12-14 05:43:45,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 05:43:45,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-14 05:43:45,801 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:43:45,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:45,802 INFO L85 PathProgramCache]: Analyzing trace with hash -818530933, now seen corresponding path program 36 times [2022-12-14 05:43:45,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:43:45,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453330457] [2022-12-14 05:43:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:45,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:43:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-12-14 05:43:46,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:43:46,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453330457] [2022-12-14 05:43:46,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453330457] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:43:46,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051163425] [2022-12-14 05:43:46,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:43:46,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:46,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:43:46,316 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:43:46,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 05:43:46,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:43:46,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:43:46,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-14 05:43:46,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-12-14 05:43:46,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-12-14 05:43:46,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051163425] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:46,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [252420360] [2022-12-14 05:43:46,479 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:43:46,479 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:43:46,479 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:43:46,479 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:43:46,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:43:46,517 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:43:46,635 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29375#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:43:46,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:43:46,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:43:46,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 19 [2022-12-14 05:43:46,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123507725] [2022-12-14 05:43:46,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:43:46,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 05:43:46,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:43:46,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 05:43:46,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2022-12-14 05:43:46,637 INFO L87 Difference]: Start difference. First operand 243 states and 271 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:47,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:47,891 INFO L93 Difference]: Finished difference Result 362 states and 395 transitions. [2022-12-14 05:43:47,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 05:43:47,892 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-12-14 05:43:47,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:47,892 INFO L225 Difference]: With dead ends: 362 [2022-12-14 05:43:47,892 INFO L226 Difference]: Without dead ends: 344 [2022-12-14 05:43:47,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2022-12-14 05:43:47,893 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:47,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 97 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:43:47,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-12-14 05:43:48,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2022-12-14 05:43:48,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.12015503875969) internal successors, (289), 258 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:48,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 289 transitions. [2022-12-14 05:43:48,363 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 289 transitions. Word has length 48 [2022-12-14 05:43:48,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:48,363 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 289 transitions. [2022-12-14 05:43:48,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:43:48,363 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 289 transitions. [2022-12-14 05:43:48,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 05:43:48,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:48,364 INFO L195 NwaCegarLoop]: trace histogram [20, 13, 11, 1, 1, 1, 1, 1, 1] [2022-12-14 05:43:48,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 05:43:48,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-14 05:43:48,565 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:43:48,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:48,566 INFO L85 PathProgramCache]: Analyzing trace with hash 65687938, now seen corresponding path program 37 times [2022-12-14 05:43:48,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:43:48,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625818929] [2022-12-14 05:43:48,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:48,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:43:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 05:43:49,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:43:49,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625818929] [2022-12-14 05:43:49,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625818929] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:43:49,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912506968] [2022-12-14 05:43:49,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:43:49,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:49,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:43:49,143 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:43:49,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 05:43:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:49,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-14 05:43:49,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 05:43:49,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 24 proven. 132 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-12-14 05:43:50,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912506968] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:50,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1094049034] [2022-12-14 05:43:50,631 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:43:50,631 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:43:50,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:43:50,631 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:43:50,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:43:50,668 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:43:50,898 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30971#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:43:50,899 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:43:50,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:43:50,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 26] total 71 [2022-12-14 05:43:50,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594362790] [2022-12-14 05:43:50,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:43:50,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-14 05:43:50,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:43:50,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-14 05:43:50,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=5000, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 05:43:50,900 INFO L87 Difference]: Start difference. First operand 259 states and 289 transitions. Second operand has 71 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:45:19,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 05:45:33,368 WARN L233 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 67 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:46:20,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 05:46:36,357 WARN L233 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 67 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:46:45,665 WARN L233 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 67 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:46:59,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:46:59,786 INFO L93 Difference]: Finished difference Result 403 states and 481 transitions. [2022-12-14 05:46:59,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2022-12-14 05:46:59,787 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-12-14 05:46:59,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:46:59,789 INFO L225 Difference]: With dead ends: 403 [2022-12-14 05:46:59,789 INFO L226 Difference]: Without dead ends: 337 [2022-12-14 05:46:59,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15196 ImplicationChecksByTransitivity, 175.1s TimeCoverageRelationStatistics Valid=3533, Invalid=49137, Unknown=0, NotChecked=0, Total=52670 [2022-12-14 05:46:59,791 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 187 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 5588 mSolverCounterSat, 259 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 5848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 5588 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:46:59,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 154 Invalid, 5848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 5588 Invalid, 1 Unknown, 0 Unchecked, 14.7s Time] [2022-12-14 05:46:59,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-12-14 05:47:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 312. [2022-12-14 05:47:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.1157556270096463) internal successors, (347), 311 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:47:00,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 347 transitions. [2022-12-14 05:47:00,397 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 347 transitions. Word has length 50 [2022-12-14 05:47:00,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:47:00,397 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 347 transitions. [2022-12-14 05:47:00,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:47:00,397 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 347 transitions. [2022-12-14 05:47:00,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 05:47:00,398 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:47:00,398 INFO L195 NwaCegarLoop]: trace histogram [21, 16, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 05:47:00,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-14 05:47:00,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:00,599 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:47:00,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:47:00,600 INFO L85 PathProgramCache]: Analyzing trace with hash 499981836, now seen corresponding path program 38 times [2022-12-14 05:47:00,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:47:00,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349705092] [2022-12-14 05:47:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:47:00,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:47:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:47:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-12-14 05:47:01,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:47:01,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349705092] [2022-12-14 05:47:01,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349705092] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:47:01,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975694984] [2022-12-14 05:47:01,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:47:01,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:47:01,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:47:01,133 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:47:01,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5484d93-d90f-48cb-a537-8841e940b14b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 05:47:03,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 05:47:03,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:47:03,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 05:47:03,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:47:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-14 05:47:04,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:47:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-14 05:47:05,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975694984] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:47:05,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [442853451] [2022-12-14 05:47:05,848 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:47:05,848 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:47:05,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:47:05,848 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:47:05,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:47:05,891 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:47:06,201 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33086#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:47:06,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:47:06,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:47:06,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28, 28] total 85 [2022-12-14 05:47:06,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763223513] [2022-12-14 05:47:06,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:47:06,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-12-14 05:47:06,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:47:06,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-12-14 05:47:06,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1407, Invalid=6425, Unknown=0, NotChecked=0, Total=7832 [2022-12-14 05:47:06,203 INFO L87 Difference]: Start difference. First operand 312 states and 347 transitions. Second operand has 85 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 85 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:47:56,669 WARN L233 SmtUtils]: Spent 15.74s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:48:29,217 WARN L233 SmtUtils]: Spent 10.22s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:49:10,561 WARN L233 SmtUtils]: Spent 11.64s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:49:35,762 WARN L233 SmtUtils]: Spent 7.98s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)