./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ad40c7e9e7b0c80b1cec1e361a82d834fdd8270143479aa0f4bf8bc2b59c2aa5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:30:51,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:30:51,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:30:51,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:30:51,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:30:51,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:30:51,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:30:51,924 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:30:51,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:30:51,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:30:51,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:30:51,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:30:51,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:30:51,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:30:51,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:30:51,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:30:51,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:30:51,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:30:51,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:30:51,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:30:51,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:30:51,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:30:51,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:30:51,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:30:51,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:30:51,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:30:51,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:30:51,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:30:51,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:30:51,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:30:51,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:30:51,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:30:51,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:30:51,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:30:51,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:30:51,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:30:51,971 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:30:51,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:30:51,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:30:51,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:30:51,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:30:51,975 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:30:52,013 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:30:52,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:30:52,013 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:30:52,014 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:30:52,014 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:30:52,014 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:30:52,015 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:30:52,015 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:30:52,015 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:30:52,015 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:30:52,015 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:30:52,015 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:30:52,016 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:30:52,016 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:30:52,016 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:30:52,016 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:30:52,016 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:30:52,017 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:30:52,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:30:52,017 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:30:52,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:30:52,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:30:52,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:30:52,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:30:52,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:30:52,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:30:52,019 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:30:52,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:30:52,019 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:30:52,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:30:52,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:30:52,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:30:52,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:30:52,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:30:52,021 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:30:52,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:30:52,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:30:52,022 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:30:52,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:30:52,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:30:52,023 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:30:52,023 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_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad40c7e9e7b0c80b1cec1e361a82d834fdd8270143479aa0f4bf8bc2b59c2aa5 [2022-11-25 23:30:52,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:30:52,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:30:52,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:30:52,342 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:30:52,343 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:30:52,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound5.c [2022-11-25 23:30:55,403 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:30:55,687 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:30:55,688 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound5.c [2022-11-25 23:30:55,701 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/data/8e515d557/79a2301d6177404a91e63109085cbb34/FLAGea5e772ff [2022-11-25 23:30:55,720 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/data/8e515d557/79a2301d6177404a91e63109085cbb34 [2022-11-25 23:30:55,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:30:55,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:30:55,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:30:55,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:30:55,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:30:55,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:30:55" (1/1) ... [2022-11-25 23:30:55,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75f3ae22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:55, skipping insertion in model container [2022-11-25 23:30:55,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:30:55" (1/1) ... [2022-11-25 23:30:55,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:30:55,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:30:55,915 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_98f6d526-45af-49e7-bd6b-66283f01f70a/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound5.c[588,601] [2022-11-25 23:30:55,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:30:55,946 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:30:55,957 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_98f6d526-45af-49e7-bd6b-66283f01f70a/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound5.c[588,601] [2022-11-25 23:30:55,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:30:55,979 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:30:55,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:55 WrapperNode [2022-11-25 23:30:55,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:30:55,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:30:55,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:30:55,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:30:55,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:55" (1/1) ... [2022-11-25 23:30:55,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:55" (1/1) ... [2022-11-25 23:30:56,011 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-11-25 23:30:56,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:30:56,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:30:56,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:30:56,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:30:56,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:55" (1/1) ... [2022-11-25 23:30:56,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:55" (1/1) ... [2022-11-25 23:30:56,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:55" (1/1) ... [2022-11-25 23:30:56,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:55" (1/1) ... [2022-11-25 23:30:56,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:55" (1/1) ... [2022-11-25 23:30:56,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:55" (1/1) ... [2022-11-25 23:30:56,032 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:55" (1/1) ... [2022-11-25 23:30:56,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:55" (1/1) ... [2022-11-25 23:30:56,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:30:56,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:30:56,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:30:56,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:30:56,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:55" (1/1) ... [2022-11-25 23:30:56,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:30:56,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:56,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:30:56,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:30:56,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:30:56,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:30:56,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:30:56,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:30:56,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 23:30:56,139 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 23:30:56,206 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:30:56,208 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:30:56,374 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:30:56,406 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:30:56,406 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 23:30:56,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:30:56 BoogieIcfgContainer [2022-11-25 23:30:56,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:30:56,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:30:56,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:30:56,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:30:56,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:30:55" (1/3) ... [2022-11-25 23:30:56,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62656a79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:30:56, skipping insertion in model container [2022-11-25 23:30:56,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:30:55" (2/3) ... [2022-11-25 23:30:56,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62656a79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:30:56, skipping insertion in model container [2022-11-25 23:30:56,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:30:56" (3/3) ... [2022-11-25 23:30:56,418 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound5.c [2022-11-25 23:30:56,438 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:30:56,439 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:30:56,503 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:30:56,510 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;@24b37e76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:30:56,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:30:56,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 23:30:56,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:30:56,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:56,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:30:56,522 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:30:56,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:56,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1070258279, now seen corresponding path program 1 times [2022-11-25 23:30:56,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:56,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620609882] [2022-11-25 23:30:56,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:56,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:56,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:56,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620609882] [2022-11-25 23:30:56,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620609882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:56,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:30:56,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:30:56,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180793384] [2022-11-25 23:30:56,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:56,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:30:56,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:57,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:30:57,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:30:57,034 INFO L87 Difference]: Start difference. First operand has 22 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:30:57,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:57,276 INFO L93 Difference]: Finished difference Result 47 states and 82 transitions. [2022-11-25 23:30:57,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:30:57,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 23:30:57,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:57,288 INFO L225 Difference]: With dead ends: 47 [2022-11-25 23:30:57,288 INFO L226 Difference]: Without dead ends: 24 [2022-11-25 23:30:57,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:30:57,295 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:57,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 52 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:30:57,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-25 23:30:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-25 23:30:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-25 23:30:57,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2022-11-25 23:30:57,342 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 6 [2022-11-25 23:30:57,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:57,342 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2022-11-25 23:30:57,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:30:57,343 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2022-11-25 23:30:57,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:30:57,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:57,344 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:57,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:30:57,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:30:57,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:57,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1088770990, now seen corresponding path program 1 times [2022-11-25 23:30:57,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:57,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291807848] [2022-11-25 23:30:57,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:57,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:57,360 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:30:57,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381172266] [2022-11-25 23:30:57,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:57,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:57,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:57,374 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:30:57,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:30:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:57,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:30:57,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:30:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:57,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:30:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:30:57,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:57,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291807848] [2022-11-25 23:30:57,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:30:57,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381172266] [2022-11-25 23:30:57,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381172266] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:30:57,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [622591832] [2022-11-25 23:30:57,847 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-25 23:30:57,847 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:30:57,851 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:30:57,856 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:30:57,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:30:58,143 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-11-25 23:30:58,163 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:30:58,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [622591832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:30:58,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:30:58,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 7] total 15 [2022-11-25 23:30:58,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066390423] [2022-11-25 23:30:58,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:30:58,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:30:58,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:30:58,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:30:58,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:30:58,496 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:30:58,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:30:58,716 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2022-11-25 23:30:58,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:30:58,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-25 23:30:58,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:30:58,719 INFO L225 Difference]: With dead ends: 55 [2022-11-25 23:30:58,719 INFO L226 Difference]: Without dead ends: 39 [2022-11-25 23:30:58,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:30:58,724 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:30:58,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:30:58,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-25 23:30:58,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-25 23:30:58,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 23:30:58,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2022-11-25 23:30:58,756 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 11 [2022-11-25 23:30:58,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:30:58,757 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2022-11-25 23:30:58,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:30:58,757 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2022-11-25 23:30:58,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-25 23:30:58,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:30:58,759 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:30:58,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 23:30:58,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:58,965 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:30:58,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:30:58,965 INFO L85 PathProgramCache]: Analyzing trace with hash -700920967, now seen corresponding path program 1 times [2022-11-25 23:30:58,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:30:58,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383211382] [2022-11-25 23:30:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:58,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:30:58,984 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:30:58,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950108596] [2022-11-25 23:30:58,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:30:58,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:30:58,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:30:58,987 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:30:59,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:30:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:30:59,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:30:59,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:30:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 23:30:59,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:30:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 23:30:59,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:30:59,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383211382] [2022-11-25 23:30:59,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:30:59,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950108596] [2022-11-25 23:30:59,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950108596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:30:59,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1954086572] [2022-11-25 23:30:59,413 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:30:59,414 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:30:59,414 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:30:59,415 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:30:59,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:31:04,430 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2022-11-25 23:31:04,468 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:31:06,799 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '602#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:31:06,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:31:06,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:31:06,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-11-25 23:31:06,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619667611] [2022-11-25 23:31:06,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:31:06,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:31:06,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:06,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:31:06,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:31:06,801 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-25 23:31:08,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:08,133 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2022-11-25 23:31:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:31:08,134 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 38 [2022-11-25 23:31:08,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:08,136 INFO L225 Difference]: With dead ends: 62 [2022-11-25 23:31:08,136 INFO L226 Difference]: Without dead ends: 60 [2022-11-25 23:31:08,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-11-25 23:31:08,138 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:08,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 41 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 23:31:08,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-25 23:31:08,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2022-11-25 23:31:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 23:31:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-11-25 23:31:08,157 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 38 [2022-11-25 23:31:08,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:08,157 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-11-25 23:31:08,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-25 23:31:08,158 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-11-25 23:31:08,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 23:31:08,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:08,159 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:31:08,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:08,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-25 23:31:08,365 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:08,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:08,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1757443022, now seen corresponding path program 2 times [2022-11-25 23:31:08,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:08,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138048822] [2022-11-25 23:31:08,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:08,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:08,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:31:08,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740856786] [2022-11-25 23:31:08,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:31:08,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:08,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:08,400 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:08,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:31:08,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:31:08,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:31:08,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:31:08,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-25 23:31:08,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:31:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-25 23:31:08,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:08,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138048822] [2022-11-25 23:31:08,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:31:08,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740856786] [2022-11-25 23:31:08,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740856786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:31:08,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [109534465] [2022-11-25 23:31:08,651 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:31:08,651 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:31:08,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:31:08,652 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:31:08,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:31:12,343 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2022-11-25 23:31:12,392 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:31:13,687 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1051#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:31:13,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:31:13,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:31:13,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-25 23:31:13,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855285822] [2022-11-25 23:31:13,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:31:13,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 23:31:13,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:13,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 23:31:13,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:31:13,707 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-25 23:31:13,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:13,920 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2022-11-25 23:31:13,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:31:13,921 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 43 [2022-11-25 23:31:13,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:13,923 INFO L225 Difference]: With dead ends: 74 [2022-11-25 23:31:13,923 INFO L226 Difference]: Without dead ends: 72 [2022-11-25 23:31:13,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:31:13,926 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 8 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:13,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 214 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:31:13,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-25 23:31:13,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2022-11-25 23:31:13,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 36 states have internal predecessors, (36), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-25 23:31:13,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-11-25 23:31:13,960 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 43 [2022-11-25 23:31:13,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:13,963 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-11-25 23:31:13,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-25 23:31:13,964 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-11-25 23:31:13,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 23:31:13,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:13,965 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:31:13,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:14,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:14,166 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:14,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:14,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1748922073, now seen corresponding path program 3 times [2022-11-25 23:31:14,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:14,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533314754] [2022-11-25 23:31:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:14,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:14,177 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:31:14,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348765833] [2022-11-25 23:31:14,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:31:14,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:14,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:14,184 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:14,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:31:14,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:31:14,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:31:14,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 23:31:14,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-25 23:31:14,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:31:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-25 23:31:14,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:14,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533314754] [2022-11-25 23:31:14,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:31:14,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348765833] [2022-11-25 23:31:14,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348765833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:31:14,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [19287937] [2022-11-25 23:31:14,730 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:31:14,730 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:31:14,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:31:14,730 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:31:14,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:31:18,744 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-25 23:31:18,748 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:31:19,644 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1565#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:31:19,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:31:19,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:31:19,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-11-25 23:31:19,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901914171] [2022-11-25 23:31:19,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:31:19,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:31:19,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:19,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:31:19,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:31:19,647 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-25 23:31:20,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:20,554 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-11-25 23:31:20,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:31:20,555 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 48 [2022-11-25 23:31:20,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:20,556 INFO L225 Difference]: With dead ends: 82 [2022-11-25 23:31:20,556 INFO L226 Difference]: Without dead ends: 74 [2022-11-25 23:31:20,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-11-25 23:31:20,558 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:20,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 54 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:31:20,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-25 23:31:20,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2022-11-25 23:31:20,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 40 states have (on average 1.05) internal successors, (42), 42 states have internal predecessors, (42), 16 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 23:31:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-11-25 23:31:20,580 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 48 [2022-11-25 23:31:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:20,581 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-11-25 23:31:20,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-25 23:31:20,581 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-11-25 23:31:20,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-25 23:31:20,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:20,583 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:31:20,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:20,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:20,787 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:20,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:20,788 INFO L85 PathProgramCache]: Analyzing trace with hash -2025080784, now seen corresponding path program 1 times [2022-11-25 23:31:20,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:20,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365487991] [2022-11-25 23:31:20,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:20,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:20,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:31:20,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117593107] [2022-11-25 23:31:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:20,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:20,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:20,799 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:20,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:31:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:20,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 23:31:20,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-25 23:31:21,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:31:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-25 23:31:21,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:21,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365487991] [2022-11-25 23:31:21,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:31:21,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117593107] [2022-11-25 23:31:21,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117593107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:31:21,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1569558620] [2022-11-25 23:31:21,375 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-25 23:31:21,375 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:31:21,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:31:21,375 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:31:21,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:31:25,073 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2022-11-25 23:31:25,105 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:31:27,029 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2192#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:31:27,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:31:27,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:31:27,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-25 23:31:27,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948983495] [2022-11-25 23:31:27,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:31:27,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:31:27,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:27,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:31:27,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:31:27,032 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-11-25 23:31:27,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:27,471 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2022-11-25 23:31:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:31:27,472 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 64 [2022-11-25 23:31:27,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:27,473 INFO L225 Difference]: With dead ends: 94 [2022-11-25 23:31:27,473 INFO L226 Difference]: Without dead ends: 92 [2022-11-25 23:31:27,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-11-25 23:31:27,475 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:27,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 149 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:31:27,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-25 23:31:27,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-11-25 23:31:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 25 states have call successors, (25), 13 states have call predecessors, (25), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-25 23:31:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2022-11-25 23:31:27,511 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 64 [2022-11-25 23:31:27,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:27,512 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2022-11-25 23:31:27,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-11-25 23:31:27,512 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2022-11-25 23:31:27,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-25 23:31:27,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:27,514 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:31:27,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:27,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:27,716 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:27,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1309118309, now seen corresponding path program 1 times [2022-11-25 23:31:27,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:27,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391188185] [2022-11-25 23:31:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:27,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:27,727 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:31:27,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035518774] [2022-11-25 23:31:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:27,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:27,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:27,734 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:27,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:31:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:27,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 23:31:27,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-25 23:31:28,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:31:28,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:28,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391188185] [2022-11-25 23:31:28,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:31:28,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035518774] [2022-11-25 23:31:28,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035518774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:31:28,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1886151312] [2022-11-25 23:31:28,203 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-25 23:31:28,203 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:31:28,203 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:31:28,204 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:31:28,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:31:32,269 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-25 23:31:32,273 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:31:33,520 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2826#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:31:33,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:31:33,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:31:33,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-11-25 23:31:33,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538045145] [2022-11-25 23:31:33,521 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 23:31:33,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:31:33,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:33,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:31:33,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:31:33,523 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-25 23:31:33,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:33,735 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2022-11-25 23:31:33,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:31:33,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 69 [2022-11-25 23:31:33,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:33,741 INFO L225 Difference]: With dead ends: 97 [2022-11-25 23:31:33,741 INFO L226 Difference]: Without dead ends: 88 [2022-11-25 23:31:33,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-11-25 23:31:33,746 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:33,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 101 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:31:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-25 23:31:33,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-25 23:31:33,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 51 states have internal predecessors, (52), 25 states have call successors, (25), 13 states have call predecessors, (25), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-25 23:31:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2022-11-25 23:31:33,803 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 69 [2022-11-25 23:31:33,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:33,805 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2022-11-25 23:31:33,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-25 23:31:33,806 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2022-11-25 23:31:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 23:31:33,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:33,815 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-11-25 23:31:33,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:34,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 23:31:34,016 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:34,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:34,017 INFO L85 PathProgramCache]: Analyzing trace with hash 33509209, now seen corresponding path program 4 times [2022-11-25 23:31:34,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:34,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030253940] [2022-11-25 23:31:34,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:34,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:34,025 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:31:34,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700110507] [2022-11-25 23:31:34,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:31:34,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:34,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:34,027 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:34,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:31:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:34,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 23:31:34,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 52 proven. 47 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-25 23:31:34,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:31:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 52 proven. 47 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-25 23:31:34,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:34,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030253940] [2022-11-25 23:31:34,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:31:34,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700110507] [2022-11-25 23:31:34,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700110507] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:31:34,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1751209604] [2022-11-25 23:31:34,680 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:31:34,680 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:31:34,680 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:31:34,680 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:31:34,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:31:38,058 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-25 23:31:38,062 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:31:38,904 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3548#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:31:38,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:31:38,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:31:38,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-25 23:31:38,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873296663] [2022-11-25 23:31:38,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:31:38,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 23:31:38,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:38,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 23:31:38,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-11-25 23:31:38,906 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 9 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2022-11-25 23:31:41,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:31:44,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:31:44,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:44,339 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2022-11-25 23:31:44,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:31:44,340 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 9 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 70 [2022-11-25 23:31:44,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:44,346 INFO L225 Difference]: With dead ends: 110 [2022-11-25 23:31:44,347 INFO L226 Difference]: Without dead ends: 108 [2022-11-25 23:31:44,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 23:31:44,350 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 67 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:44,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 61 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 466 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2022-11-25 23:31:44,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-25 23:31:44,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2022-11-25 23:31:44,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 57 states have internal predecessors, (58), 25 states have call successors, (25), 15 states have call predecessors, (25), 15 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-25 23:31:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2022-11-25 23:31:44,407 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 70 [2022-11-25 23:31:44,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:44,409 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2022-11-25 23:31:44,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 9 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2022-11-25 23:31:44,409 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2022-11-25 23:31:44,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-25 23:31:44,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:44,412 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:31:44,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:44,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 23:31:44,618 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:44,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:44,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1760296702, now seen corresponding path program 2 times [2022-11-25 23:31:44,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:44,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048814965] [2022-11-25 23:31:44,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:44,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:44,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:31:44,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534525004] [2022-11-25 23:31:44,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:31:44,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:44,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:44,630 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:44,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:31:44,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:31:44,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:31:44,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 23:31:44,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 107 proven. 38 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-11-25 23:31:45,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:31:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 107 proven. 38 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-11-25 23:31:47,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:47,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048814965] [2022-11-25 23:31:47,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:31:47,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534525004] [2022-11-25 23:31:47,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534525004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:31:47,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1408970985] [2022-11-25 23:31:47,059 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-25 23:31:47,060 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:31:47,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:31:47,060 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:31:47,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:31:51,251 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-25 23:31:51,255 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:31:52,847 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4467#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:31:52,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:31:52,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:31:52,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2022-11-25 23:31:52,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114556609] [2022-11-25 23:31:52,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:31:52,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 23:31:52,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:52,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 23:31:52,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-11-25 23:31:52,860 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 10 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2022-11-25 23:31:59,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:32:01,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:32:03,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:32:09,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:32:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:09,600 INFO L93 Difference]: Finished difference Result 147 states and 172 transitions. [2022-11-25 23:32:09,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 23:32:09,601 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 10 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) Word has length 96 [2022-11-25 23:32:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:09,603 INFO L225 Difference]: With dead ends: 147 [2022-11-25 23:32:09,603 INFO L226 Difference]: Without dead ends: 133 [2022-11-25 23:32:09,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 23:32:09,604 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 95 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:09,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 52 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 392 Invalid, 3 Unknown, 0 Unchecked, 10.6s Time] [2022-11-25 23:32:09,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-25 23:32:09,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-11-25 23:32:09,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 75 states have internal predecessors, (78), 40 states have call successors, (40), 19 states have call predecessors, (40), 19 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-25 23:32:09,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 156 transitions. [2022-11-25 23:32:09,673 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 156 transitions. Word has length 96 [2022-11-25 23:32:09,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:09,674 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 156 transitions. [2022-11-25 23:32:09,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 10 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2022-11-25 23:32:09,674 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 156 transitions. [2022-11-25 23:32:09,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-25 23:32:09,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:09,676 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:09,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:09,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:09,880 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:32:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:09,881 INFO L85 PathProgramCache]: Analyzing trace with hash 74939536, now seen corresponding path program 2 times [2022-11-25 23:32:09,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:09,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772918860] [2022-11-25 23:32:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:09,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:09,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:32:09,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305463944] [2022-11-25 23:32:09,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:32:09,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:09,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:09,892 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:09,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:32:10,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:32:10,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:32:10,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:32:10,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-11-25 23:32:10,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:32:10,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:10,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772918860] [2022-11-25 23:32:10,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:32:10,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305463944] [2022-11-25 23:32:10,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305463944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:32:10,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [425124689] [2022-11-25 23:32:10,391 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-25 23:32:10,392 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:32:10,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:32:10,392 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:32:10,392 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:32:13,699 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2022-11-25 23:32:13,729 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:32:15,091 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5291#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:32:15,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:32:15,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:32:15,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-25 23:32:15,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898594371] [2022-11-25 23:32:15,092 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 23:32:15,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 23:32:15,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:15,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 23:32:15,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:32:15,093 INFO L87 Difference]: Start difference. First operand 133 states and 156 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-25 23:32:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:15,323 INFO L93 Difference]: Finished difference Result 139 states and 161 transitions. [2022-11-25 23:32:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:32:15,324 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 118 [2022-11-25 23:32:15,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:15,327 INFO L225 Difference]: With dead ends: 139 [2022-11-25 23:32:15,327 INFO L226 Difference]: Without dead ends: 133 [2022-11-25 23:32:15,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-25 23:32:15,328 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:15,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:32:15,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-25 23:32:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-11-25 23:32:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 38 states have call successors, (38), 20 states have call predecessors, (38), 19 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-25 23:32:15,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 151 transitions. [2022-11-25 23:32:15,384 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 151 transitions. Word has length 118 [2022-11-25 23:32:15,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:15,385 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 151 transitions. [2022-11-25 23:32:15,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-25 23:32:15,385 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 151 transitions. [2022-11-25 23:32:15,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-25 23:32:15,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:15,388 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:15,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:15,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 23:32:15,589 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:32:15,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:15,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2082635326, now seen corresponding path program 3 times [2022-11-25 23:32:15,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:15,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958948604] [2022-11-25 23:32:15,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:15,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:15,609 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:32:15,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770049555] [2022-11-25 23:32:15,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:32:15,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:15,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:15,610 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:15,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:32:17,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:32:17,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:32:17,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-25 23:32:17,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2885 backedges. 583 proven. 336 refuted. 0 times theorem prover too weak. 1966 trivial. 0 not checked. [2022-11-25 23:32:19,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:32:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2885 backedges. 309 proven. 17 refuted. 0 times theorem prover too weak. 2559 trivial. 0 not checked. [2022-11-25 23:32:23,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:23,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958948604] [2022-11-25 23:32:23,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:32:23,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770049555] [2022-11-25 23:32:23,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770049555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:32:23,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1761464408] [2022-11-25 23:32:23,579 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-25 23:32:23,579 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:32:23,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:32:23,580 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:32:23,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:32:27,417 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-25 23:32:27,420 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:32:29,737 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6948#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:32:29,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:32:29,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:32:29,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2022-11-25 23:32:29,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748002132] [2022-11-25 23:32:29,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:32:29,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 23:32:29,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:29,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 23:32:29,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=723, Unknown=1, NotChecked=0, Total=870 [2022-11-25 23:32:29,741 INFO L87 Difference]: Start difference. First operand 133 states and 151 transitions. Second operand has 18 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 11 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 9 states have call predecessors, (30), 11 states have call successors, (30) [2022-11-25 23:32:33,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:33,257 INFO L93 Difference]: Finished difference Result 133 states and 151 transitions. [2022-11-25 23:32:33,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:32:33,258 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 11 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 9 states have call predecessors, (30), 11 states have call successors, (30) Word has length 204 [2022-11-25 23:32:33,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:33,259 INFO L225 Difference]: With dead ends: 133 [2022-11-25 23:32:33,259 INFO L226 Difference]: Without dead ends: 0 [2022-11-25 23:32:33,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 578 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=173, Invalid=882, Unknown=1, NotChecked=0, Total=1056 [2022-11-25 23:32:33,260 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:33,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 23 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-25 23:32:33,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-25 23:32:33,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-25 23:32:33,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:32:33,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-25 23:32:33,262 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 204 [2022-11-25 23:32:33,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:33,262 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 23:32:33,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 11 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 9 states have call predecessors, (30), 11 states have call successors, (30) [2022-11-25 23:32:33,263 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-25 23:32:33,263 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-25 23:32:33,265 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-25 23:32:33,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:33,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 23:32:33,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-25 23:32:46,693 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-25 23:32:46,693 INFO L895 garLoopResultBuilder]: At program point L33-2(lines 33 46) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (= (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (<= |ULTIMATE.start_main_~a~0#1| 5) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-11-25 23:32:46,693 INFO L895 garLoopResultBuilder]: At program point L33-3(lines 33 46) the Hoare annotation is: (let ((.cse6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (let ((.cse0 (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1))) (.cse1 (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24)))) (.cse2 (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse6))) (.cse3 (<= 0 |ULTIMATE.start_main_~a~0#1|)) (.cse4 (<= (+ 6 .cse6) |ULTIMATE.start_main_~z~0#1|))) (or (and .cse0 (<= |ULTIMATE.start_main_~a~0#1| 0) (= (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|) (+ (* |ULTIMATE.start_main_~x~0#1| 12) (* 6 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)))) .cse1 .cse2 .cse3 .cse4) (let ((.cse5 (div (- |ULTIMATE.start_main_~z~0#1|) (- 6)))) (and .cse0 (not (<= .cse5 (+ |ULTIMATE.start_main_~a~0#1| 1))) (<= |ULTIMATE.start_main_~a~0#1| 5) .cse1 .cse2 .cse3 (<= .cse5 (+ 2 |ULTIMATE.start_main_~a~0#1|)) .cse4))))) [2022-11-25 23:32:46,694 INFO L895 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-11-25 23:32:46,694 INFO L895 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-11-25 23:32:46,694 INFO L895 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse5 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) (.cse2 (* 6 |ULTIMATE.start_main_~n~0#1|))) (let ((.cse4 (+ 6 .cse2)) (.cse0 (* 3 |ULTIMATE.start_main_~n~0#1|)) (.cse1 (* 3 .cse5)) (.cse3 (<= 0 |ULTIMATE.start_main_~a~0#1|))) (or (and (= |ULTIMATE.start_main_~y~0#1| (+ .cse0 .cse1 1)) (<= |ULTIMATE.start_main_~a~0#1| 0) (= (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|) (+ (* |ULTIMATE.start_main_~x~0#1| 12) (* 6 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)))) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse2)) .cse3 (<= .cse4 |ULTIMATE.start_main_~z~0#1|)) (let ((.cse6 (div (- |ULTIMATE.start_main_~z~0#1|) (- 6)))) (and (<= |ULTIMATE.start_main_~a~0#1| 5) (= |ULTIMATE.start_main_~z~0#1| .cse4) (= (+ .cse0 5 |ULTIMATE.start_main_~y~0#1|) (+ .cse1 |ULTIMATE.start_main_~z~0#1|)) .cse3 (= (+ (* 6 .cse5) (* |ULTIMATE.start_main_~n~0#1| 12) (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) 8) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|)) (< (+ |ULTIMATE.start_main_~a~0#1| 1) .cse6) (<= .cse6 (+ 2 |ULTIMATE.start_main_~a~0#1|))))))) [2022-11-25 23:32:46,695 INFO L899 garLoopResultBuilder]: For program point L38(lines 33 46) no Hoare annotation was computed. [2022-11-25 23:32:46,695 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (<= |ULTIMATE.start_main_~a~0#1| 5) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= (+ (* 3 |ULTIMATE.start_main_~n~0#1|) 5 |ULTIMATE.start_main_~y~0#1|) (+ (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~z~0#1|)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-11-25 23:32:46,695 INFO L895 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (= (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (<= |ULTIMATE.start_main_~a~0#1| 5) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-11-25 23:32:46,695 INFO L895 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) (.cse1 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 .cse0) 1)) (<= |ULTIMATE.start_main_~a~0#1| 5) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse1)) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= (+ (* 6 .cse0) (* |ULTIMATE.start_main_~n~0#1| 12) (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) 8) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|)) (<= (+ 6 .cse1) |ULTIMATE.start_main_~z~0#1|))) [2022-11-25 23:32:46,695 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-25 23:32:46,696 INFO L895 garLoopResultBuilder]: At program point L53(line 53) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-11-25 23:32:46,696 INFO L895 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-11-25 23:32:46,696 INFO L895 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (= (+ (* 2 |ULTIMATE.start_main_~y~0#1|) (* 6 |ULTIMATE.start_main_~a~0#1|) 10) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~z~0#1|) (* 2 |ULTIMATE.start_main_~z~0#1|))) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-11-25 23:32:46,696 INFO L895 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (<= |ULTIMATE.start_main_~a~0#1| 5) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= (+ (* 3 |ULTIMATE.start_main_~n~0#1|) 5 |ULTIMATE.start_main_~y~0#1|) (+ (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~z~0#1|)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-11-25 23:32:46,696 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|))) (and (<= |ULTIMATE.start_main_~a~0#1| 5) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= (+ (* 3 |ULTIMATE.start_main_~n~0#1|) 5 |ULTIMATE.start_main_~y~0#1|) (+ (* 3 .cse0) |ULTIMATE.start_main_~z~0#1|)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= (+ (* 6 .cse0) (* |ULTIMATE.start_main_~n~0#1| 12) (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) 8) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|)))) [2022-11-25 23:32:46,697 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-11-25 23:32:46,697 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-11-25 23:32:46,697 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-11-25 23:32:46,697 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-11-25 23:32:46,697 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-11-25 23:32:46,697 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-11-25 23:32:46,700 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 2, 1, 1] [2022-11-25 23:32:46,702 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 23:32:46,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 11:32:46 BoogieIcfgContainer [2022-11-25 23:32:46,720 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 23:32:46,720 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 23:32:46,720 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 23:32:46,721 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 23:32:46,721 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:30:56" (3/4) ... [2022-11-25 23:32:46,724 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-25 23:32:46,729 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-25 23:32:46,735 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-11-25 23:32:46,736 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-25 23:32:46,736 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-25 23:32:46,737 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-25 23:32:46,773 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-25 23:32:46,774 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 23:32:46,774 INFO L158 Benchmark]: Toolchain (without parser) took 111048.73ms. Allocated memory was 188.7MB in the beginning and 599.8MB in the end (delta: 411.0MB). Free memory was 156.7MB in the beginning and 521.9MB in the end (delta: -365.2MB). Peak memory consumption was 48.7MB. Max. memory is 16.1GB. [2022-11-25 23:32:46,775 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 134.2MB. Free memory is still 76.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:32:46,775 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.43ms. Allocated memory is still 188.7MB. Free memory was 156.7MB in the beginning and 145.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 23:32:46,776 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.37ms. Allocated memory is still 188.7MB. Free memory was 145.9MB in the beginning and 144.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 23:32:46,776 INFO L158 Benchmark]: Boogie Preprocessor took 44.31ms. Allocated memory is still 188.7MB. Free memory was 144.2MB in the beginning and 143.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 23:32:46,777 INFO L158 Benchmark]: RCFGBuilder took 351.87ms. Allocated memory is still 188.7MB. Free memory was 143.0MB in the beginning and 130.1MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 23:32:46,777 INFO L158 Benchmark]: TraceAbstraction took 110308.17ms. Allocated memory was 188.7MB in the beginning and 599.8MB in the end (delta: 411.0MB). Free memory was 129.2MB in the beginning and 524.0MB in the end (delta: -394.9MB). Peak memory consumption was 336.3MB. Max. memory is 16.1GB. [2022-11-25 23:32:46,777 INFO L158 Benchmark]: Witness Printer took 53.33ms. Allocated memory is still 599.8MB. Free memory was 524.0MB in the beginning and 521.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 23:32:46,782 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 134.2MB. Free memory is still 76.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 251.43ms. Allocated memory is still 188.7MB. Free memory was 156.7MB in the beginning and 145.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.37ms. Allocated memory is still 188.7MB. Free memory was 145.9MB in the beginning and 144.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.31ms. Allocated memory is still 188.7MB. Free memory was 144.2MB in the beginning and 143.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 351.87ms. Allocated memory is still 188.7MB. Free memory was 143.0MB in the beginning and 130.1MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 110308.17ms. Allocated memory was 188.7MB in the beginning and 599.8MB in the end (delta: 411.0MB). Free memory was 129.2MB in the beginning and 524.0MB in the end (delta: -394.9MB). Peak memory consumption was 336.3MB. Max. memory is 16.1GB. * Witness Printer took 53.33ms. Allocated memory is still 599.8MB. Free memory was 524.0MB in the beginning and 521.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 110.2s, OverallIterations: 11, TraceHistogramMax: 38, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 29.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 13.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 187 SdHoareTripleChecker+Valid, 21.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 147 mSDsluCounter, 842 SdHoareTripleChecker+Invalid, 21.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 574 mSDsCounter, 362 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2415 IncrementalHoareTripleChecker+Invalid, 2782 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 362 mSolverCounterUnsat, 268 mSDtfsCounter, 2415 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2168 GetRequests, 1898 SyntacticMatches, 11 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 28.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred in iteration=9, InterpolantAutomatonStates: 104, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 44 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 83 PreInvPairs, 144 NumberOfFragments, 801 HoareAnnotationTreeSize, 83 FomulaSimplifications, 787 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 14 FomulaSimplificationsInter, 39385 FormulaSimplificationTreeSizeReductionInter, 12.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 12.2s InterpolantComputationTime, 767 NumberOfCodeBlocks, 583 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 1322 ConstructedInterpolants, 0 QuantifiedInterpolants, 8268 SizeOfPredicates, 45 NumberOfNonLiveVariables, 1467 ConjunctsInSsa, 321 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 9267/9915 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.3s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 9, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 4, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 15, TOOLS_QUANTIFIERELIM_TIME: 0.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 25, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 9, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 2, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 49, DAG_COMPRESSION_RETAINED_NODES: 29, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: (((((n * n * n == x && y == 3 * n + 3 * (n * n) + 1) && a <= 5) && z < 7 + 6 * n) && n <= a + 1) && 0 <= a) && 6 + 6 * n <= z - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: z < 7 + 6 * n && 6 + 6 * n <= z RESULT: Ultimate proved your program to be correct! [2022-11-25 23:32:46,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f6d526-45af-49e7-bd6b-66283f01f70a/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE