./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS --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 724878768076b8192fcddec982755d081255c76c80e1e283d808e6a7ebb222b9 --- 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-8393723 [2022-11-19 07:25:31,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:25:31,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:25:31,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:25:31,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:25:31,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:25:31,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:25:31,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:25:31,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:25:31,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:25:31,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:25:31,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:25:31,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:25:31,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:25:31,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:25:31,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:25:31,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:25:31,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:25:31,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:25:31,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:25:31,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:25:31,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:25:31,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:25:31,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:25:31,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:25:31,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:25:31,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:25:31,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:25:31,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:25:31,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:25:31,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:25:31,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:25:31,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:25:31,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:25:31,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:25:31,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:25:31,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:25:31,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:25:31,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:25:31,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:25:31,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:25:31,912 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:25:31,949 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:25:31,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:25:31,949 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:25:31,950 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:25:31,951 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:25:31,951 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:25:31,951 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:25:31,952 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:25:31,952 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:25:31,952 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:25:31,952 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:25:31,953 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:25:31,953 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:25:31,953 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:25:31,953 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:25:31,954 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:25:31,954 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:25:31,954 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:25:31,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:25:31,956 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:25:31,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:25:31,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:25:31,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:25:31,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:25:31,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:25:31,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:25:31,958 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:25:31,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:25:31,958 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:25:31,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:25:31,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:25:31,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:25:31,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:25:31,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:25:31,960 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:25:31,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:25:31,961 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:25:31,961 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:25:31,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:25:31,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:25:31,962 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:25:31,962 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_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 724878768076b8192fcddec982755d081255c76c80e1e283d808e6a7ebb222b9 [2022-11-19 07:25:32,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:25:32,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:25:32,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:25:32,327 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:25:32,329 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:25:32,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2022-11-19 07:25:32,421 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/data/722451452/9afe571ace934a3d8fddfb2c7545b844/FLAGdbf60f3e3 [2022-11-19 07:25:33,261 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:25:33,269 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2022-11-19 07:25:33,284 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/data/722451452/9afe571ace934a3d8fddfb2c7545b844/FLAGdbf60f3e3 [2022-11-19 07:25:33,503 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/data/722451452/9afe571ace934a3d8fddfb2c7545b844 [2022-11-19 07:25:33,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:25:33,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:25:33,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:25:33,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:25:33,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:25:33,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:25:33" (1/1) ... [2022-11-19 07:25:33,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@368ea9f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:33, skipping insertion in model container [2022-11-19 07:25:33,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:25:33" (1/1) ... [2022-11-19 07:25:33,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:25:33,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:25:34,053 WARN L234 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_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2022-11-19 07:25:34,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:25:34,085 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:25:34,177 WARN L234 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_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2022-11-19 07:25:34,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:25:34,228 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:25:34,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:34 WrapperNode [2022-11-19 07:25:34,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:25:34,230 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:25:34,231 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:25:34,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:25:34,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:34" (1/1) ... [2022-11-19 07:25:34,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:34" (1/1) ... [2022-11-19 07:25:34,329 INFO L138 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 137 [2022-11-19 07:25:34,333 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:25:34,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:25:34,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:25:34,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:25:34,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:34" (1/1) ... [2022-11-19 07:25:34,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:34" (1/1) ... [2022-11-19 07:25:34,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:34" (1/1) ... [2022-11-19 07:25:34,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:34" (1/1) ... [2022-11-19 07:25:34,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:34" (1/1) ... [2022-11-19 07:25:34,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:34" (1/1) ... [2022-11-19 07:25:34,392 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:34" (1/1) ... [2022-11-19 07:25:34,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:34" (1/1) ... [2022-11-19 07:25:34,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:25:34,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:25:34,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:25:34,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:25:34,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:34" (1/1) ... [2022-11-19 07:25:34,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:25:34,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:34,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:25:34,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:25:34,508 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-11-19 07:25:34,508 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-11-19 07:25:34,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:25:34,509 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2022-11-19 07:25:34,509 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2022-11-19 07:25:34,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:25:34,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:25:34,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:25:34,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:25:34,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:25:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:25:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:25:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:25:34,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:25:34,728 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:25:34,745 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:25:34,807 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-11-19 07:25:35,135 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:25:35,199 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:25:35,199 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-19 07:25:35,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:25:35 BoogieIcfgContainer [2022-11-19 07:25:35,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:25:35,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:25:35,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:25:35,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:25:35,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:25:33" (1/3) ... [2022-11-19 07:25:35,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d555740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:25:35, skipping insertion in model container [2022-11-19 07:25:35,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:34" (2/3) ... [2022-11-19 07:25:35,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d555740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:25:35, skipping insertion in model container [2022-11-19 07:25:35,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:25:35" (3/3) ... [2022-11-19 07:25:35,215 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-1.i [2022-11-19 07:25:35,241 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:25:35,242 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:25:35,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:25:35,348 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;@50c90d2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:25:35,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:25:35,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 28 states have (on average 1.5) internal successors, (42), 30 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:25:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 07:25:35,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:35,371 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:35,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:35,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:35,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1026929465, now seen corresponding path program 1 times [2022-11-19 07:25:35,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:35,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187809522] [2022-11-19 07:25:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:35,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:25:35,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:35,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187809522] [2022-11-19 07:25:35,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187809522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:35,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290808691] [2022-11-19 07:25:35,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:35,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:35,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:35,666 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:35,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:25:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:35,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-19 07:25:35,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:25:35,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:25:35,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290808691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:35,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:25:35,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2022-11-19 07:25:35,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760502009] [2022-11-19 07:25:35,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:35,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:25:35,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:35,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:25:35,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:25:35,956 INFO L87 Difference]: Start difference. First operand has 36 states, 28 states have (on average 1.5) internal successors, (42), 30 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:25:36,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:36,039 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2022-11-19 07:25:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:25:36,043 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-11-19 07:25:36,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:36,062 INFO L225 Difference]: With dead ends: 70 [2022-11-19 07:25:36,063 INFO L226 Difference]: Without dead ends: 29 [2022-11-19 07:25:36,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:25:36,075 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:36,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:25:36,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-19 07:25:36,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-19 07:25:36,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:25:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-11-19 07:25:36,137 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 20 [2022-11-19 07:25:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:36,139 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-11-19 07:25:36,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:25:36,140 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-11-19 07:25:36,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 07:25:36,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:36,146 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:36,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:36,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:36,353 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:36,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:36,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1215492872, now seen corresponding path program 1 times [2022-11-19 07:25:36,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:36,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764521387] [2022-11-19 07:25:36,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:36,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:25:36,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:36,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764521387] [2022-11-19 07:25:36,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764521387] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:36,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105302396] [2022-11-19 07:25:36,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:36,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:36,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:36,806 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:36,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:25:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:36,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:25:36,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:25:37,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:25:37,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105302396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:37,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:25:37,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-19 07:25:37,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122405453] [2022-11-19 07:25:37,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:37,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:25:37,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:37,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:25:37,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:25:37,165 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:25:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:37,361 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-11-19 07:25:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:25:37,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-11-19 07:25:37,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:37,363 INFO L225 Difference]: With dead ends: 53 [2022-11-19 07:25:37,364 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 07:25:37,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:25:37,366 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:37,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 116 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:25:37,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 07:25:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-19 07:25:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:25:37,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-19 07:25:37,382 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 24 [2022-11-19 07:25:37,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:37,385 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-19 07:25:37,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:25:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-19 07:25:37,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:25:37,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:37,388 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:37,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:37,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:37,596 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:37,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:37,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1158384687, now seen corresponding path program 1 times [2022-11-19 07:25:37,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:37,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783698504] [2022-11-19 07:25:37,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:37,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:25:37,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:37,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783698504] [2022-11-19 07:25:37,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783698504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:37,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:25:37,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:25:37,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228632484] [2022-11-19 07:25:37,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:37,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:25:37,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:37,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:25:37,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:25:37,841 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:25:38,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:38,055 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-11-19 07:25:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:25:38,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-19 07:25:38,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:38,057 INFO L225 Difference]: With dead ends: 51 [2022-11-19 07:25:38,057 INFO L226 Difference]: Without dead ends: 48 [2022-11-19 07:25:38,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:25:38,059 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 84 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:38,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 83 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:25:38,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-19 07:25:38,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2022-11-19 07:25:38,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:25:38,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-11-19 07:25:38,080 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 28 [2022-11-19 07:25:38,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:38,081 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-11-19 07:25:38,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:25:38,082 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-11-19 07:25:38,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 07:25:38,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:38,083 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:38,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:25:38,084 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:38,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:38,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1548563416, now seen corresponding path program 1 times [2022-11-19 07:25:38,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:38,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220230905] [2022-11-19 07:25:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:38,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:25:38,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:38,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220230905] [2022-11-19 07:25:38,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220230905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:38,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451461696] [2022-11-19 07:25:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:38,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:38,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:38,373 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:38,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:25:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:38,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:25:38,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:25:38,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:25:38,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451461696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:38,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1669068723] [2022-11-19 07:25:38,914 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-19 07:25:38,922 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:25:38,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:25:38,934 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:25:38,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:25:39,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:39,223 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:25:39,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-19 07:25:39,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:39,265 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:25:39,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:25:39,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:39,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:39,387 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:25:39,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:25:39,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:39,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:39,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-19 07:25:39,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:25:39,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:39,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:25:39,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:25:39,815 INFO L321 Elim1Store]: treesize reduction 124, result has 24.8 percent of original size [2022-11-19 07:25:39,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 235 treesize of output 259 [2022-11-19 07:25:39,905 INFO L321 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2022-11-19 07:25:39,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 228 treesize of output 237 [2022-11-19 07:25:40,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:25:40,432 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:25:40,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 232 [2022-11-19 07:25:40,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:25:40,475 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-19 07:25:40,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 273 treesize of output 272 [2022-11-19 07:25:40,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:40,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 276 [2022-11-19 07:25:40,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:25:40,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:40,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 07:25:40,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:25:40,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:25:40,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:40,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:25:41,168 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 65 for LOIs [2022-11-19 07:25:41,341 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:25:45,042 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '756#(and (= |ULTIMATE.start_sll_length_~head#1.base| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= |ULTIMATE.start_sll_length_#res#1| 2147483647) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= (+ |ULTIMATE.start_sll_create_~len#1| 1) 0) (<= 0 |ULTIMATE.start_sll_length_~len~0#1|) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (not (= (+ |ULTIMATE.start_main_~len~2#1| |ULTIMATE.start_main_~k~0#1|) |ULTIMATE.start_sll_length_#res#1|)) (= |ULTIMATE.start_main_~k~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_length_~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_length_~len~0#1| |ULTIMATE.start_sll_length_#res#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_main_~len~2#1| 2) (<= 2 |ULTIMATE.start_main_~len~2#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:25:45,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:25:45,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:25:45,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-11-19 07:25:45,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971748616] [2022-11-19 07:25:45,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:25:45,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 07:25:45,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:45,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 07:25:45,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:25:45,052 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 15 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:25:45,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:45,522 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2022-11-19 07:25:45,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:25:45,523 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2022-11-19 07:25:45,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:45,526 INFO L225 Difference]: With dead ends: 79 [2022-11-19 07:25:45,526 INFO L226 Difference]: Without dead ends: 53 [2022-11-19 07:25:45,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 07:25:45,529 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:45,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 220 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:25:45,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-19 07:25:45,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2022-11-19 07:25:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:25:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-11-19 07:25:45,540 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 29 [2022-11-19 07:25:45,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:45,541 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-11-19 07:25:45,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:25:45,542 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-11-19 07:25:45,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 07:25:45,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:45,543 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:45,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-19 07:25:45,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:45,750 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:45,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:45,751 INFO L85 PathProgramCache]: Analyzing trace with hash -692503791, now seen corresponding path program 2 times [2022-11-19 07:25:45,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:45,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88876424] [2022-11-19 07:25:45,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:45,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:25:46,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:46,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88876424] [2022-11-19 07:25:46,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88876424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:46,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757186713] [2022-11-19 07:25:46,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:25:46,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:46,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:46,356 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:46,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:25:46,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:25:46,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:25:46,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-19 07:25:46,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:46,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:25:46,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:25:46,890 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:25:46,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-19 07:25:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:25:46,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:46,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-19 07:25:47,072 INFO L321 Elim1Store]: treesize reduction 11, result has 64.5 percent of original size [2022-11-19 07:25:47,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 132 [2022-11-19 07:25:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:25:47,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757186713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:47,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [18436758] [2022-11-19 07:25:47,138 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-19 07:25:47,138 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:25:47,139 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:25:47,139 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:25:47,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:25:47,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:47,244 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:25:47,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-19 07:25:47,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:47,279 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:25:47,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:25:47,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:47,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:47,347 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:25:47,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:25:47,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:47,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:47,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-19 07:25:47,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:25:47,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:47,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:25:47,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:25:47,618 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-11-19 07:25:47,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 230 treesize of output 239 [2022-11-19 07:25:47,751 INFO L321 Elim1Store]: treesize reduction 132, result has 20.0 percent of original size [2022-11-19 07:25:47,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 233 treesize of output 249 [2022-11-19 07:25:48,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:25:48,141 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:25:48,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 232 [2022-11-19 07:25:48,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:25:48,186 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 07:25:48,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 248 [2022-11-19 07:25:48,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:48,223 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-19 07:25:48,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 293 treesize of output 276 [2022-11-19 07:25:48,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:25:48,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:48,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:25:48,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:25:48,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 07:25:48,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:25:48,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:48,761 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 65 for LOIs [2022-11-19 07:25:48,918 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:25:52,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1156#(and (= |ULTIMATE.start_sll_length_~head#1.base| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= |ULTIMATE.start_sll_length_#res#1| 2147483647) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= (+ |ULTIMATE.start_sll_create_~len#1| 1) 0) (<= 0 |ULTIMATE.start_sll_length_~len~0#1|) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (not (= (+ |ULTIMATE.start_main_~len~2#1| |ULTIMATE.start_main_~k~0#1|) |ULTIMATE.start_sll_length_#res#1|)) (= |ULTIMATE.start_main_~k~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_length_~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_length_~len~0#1| |ULTIMATE.start_sll_length_#res#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_main_~len~2#1| 2) (<= 2 |ULTIMATE.start_main_~len~2#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:25:52,451 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:25:52,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:25:52,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 14 [2022-11-19 07:25:52,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344551919] [2022-11-19 07:25:52,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:25:52,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:25:52,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:52,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:25:52,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-11-19 07:25:52,455 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:25:52,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:52,794 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-11-19 07:25:52,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:25:52,795 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-11-19 07:25:52,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:52,798 INFO L225 Difference]: With dead ends: 57 [2022-11-19 07:25:52,798 INFO L226 Difference]: Without dead ends: 54 [2022-11-19 07:25:52,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:25:52,804 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 43 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:52,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 212 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-11-19 07:25:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-19 07:25:52,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2022-11-19 07:25:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:25:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-11-19 07:25:52,837 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 33 [2022-11-19 07:25:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:52,837 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-11-19 07:25:52,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:25:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-11-19 07:25:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 07:25:52,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:52,840 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:52,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:53,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:53,054 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:53,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:53,055 INFO L85 PathProgramCache]: Analyzing trace with hash 5595446, now seen corresponding path program 3 times [2022-11-19 07:25:53,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:53,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432313817] [2022-11-19 07:25:53,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:53,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:25:53,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:53,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432313817] [2022-11-19 07:25:53,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432313817] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:53,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905966409] [2022-11-19 07:25:53,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:25:53,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:53,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:53,626 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:53,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:25:53,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:25:53,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:25:53,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 07:25:53,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:25:53,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:25:54,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905966409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:54,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1478514720] [2022-11-19 07:25:54,268 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-19 07:25:54,268 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:25:54,269 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:25:54,269 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:25:54,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:25:54,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,349 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:25:54,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:25:54,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:25:54,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,430 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-19 07:25:54,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-11-19 07:25:54,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,488 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:25:54,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 07:25:54,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:25:54,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:25:54,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:54,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:25:54,822 INFO L321 Elim1Store]: treesize reduction 124, result has 24.8 percent of original size [2022-11-19 07:25:54,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 235 treesize of output 259 [2022-11-19 07:25:54,909 INFO L321 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2022-11-19 07:25:54,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 228 treesize of output 237 [2022-11-19 07:25:55,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:55,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 220 [2022-11-19 07:25:55,245 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:25:55,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 232 [2022-11-19 07:25:55,282 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:25:55,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 240 [2022-11-19 07:25:55,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:55,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:25:55,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:25:55,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 07:25:55,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:25:55,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:25:55,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:55,822 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 65 for LOIs [2022-11-19 07:25:55,974 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:25:59,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1546#(and (= |ULTIMATE.start_sll_length_~head#1.base| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= |ULTIMATE.start_sll_length_#res#1| 2147483647) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= (+ |ULTIMATE.start_sll_create_~len#1| 1) 0) (<= 0 |ULTIMATE.start_sll_length_~len~0#1|) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (not (= (+ |ULTIMATE.start_main_~len~2#1| |ULTIMATE.start_main_~k~0#1|) |ULTIMATE.start_sll_length_#res#1|)) (= |ULTIMATE.start_main_~k~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_length_~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_length_~len~0#1| |ULTIMATE.start_sll_length_#res#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_main_~len~2#1| 2) (<= 2 |ULTIMATE.start_main_~len~2#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:25:59,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:25:59,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:25:59,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 22 [2022-11-19 07:25:59,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615816543] [2022-11-19 07:25:59,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:25:59,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:25:59,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:59,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:25:59,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:25:59,182 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:25:59,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:59,892 INFO L93 Difference]: Finished difference Result 125 states and 150 transitions. [2022-11-19 07:25:59,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:25:59,894 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-11-19 07:25:59,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:59,900 INFO L225 Difference]: With dead ends: 125 [2022-11-19 07:25:59,900 INFO L226 Difference]: Without dead ends: 122 [2022-11-19 07:25:59,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=212, Invalid=1768, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 07:25:59,907 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 95 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:59,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 322 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:25:59,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-19 07:25:59,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2022-11-19 07:25:59,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 74 states have internal predecessors, (88), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-19 07:25:59,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2022-11-19 07:25:59,937 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 34 [2022-11-19 07:25:59,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:59,937 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2022-11-19 07:25:59,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:25:59,938 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2022-11-19 07:25:59,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 07:25:59,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:59,940 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:59,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:00,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:26:00,148 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:00,149 INFO L85 PathProgramCache]: Analyzing trace with hash 171835313, now seen corresponding path program 4 times [2022-11-19 07:26:00,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:00,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225484529] [2022-11-19 07:26:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:00,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:26:01,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:01,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225484529] [2022-11-19 07:26:01,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225484529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:01,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555088463] [2022-11-19 07:26:01,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:26:01,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:01,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:01,057 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:01,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b9dc3-1a53-45bc-9106-bd2b4544ce2b/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:26:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:01,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-19 07:26:01,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:01,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:26:01,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:26:01,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:26:01,352 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:26:01,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 07:26:01,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-19 07:26:01,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 07:26:02,102 INFO L321 Elim1Store]: treesize reduction 80, result has 28.6 percent of original size [2022-11-19 07:26:02,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 120 treesize of output 91 [2022-11-19 07:26:02,139 INFO L321 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2022-11-19 07:26:02,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 46 [2022-11-19 07:26:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:02,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:02,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:26:03,001 INFO L321 Elim1Store]: treesize reduction 39, result has 72.5 percent of original size [2022-11-19 07:26:03,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 2716 treesize of output 2562 [2022-11-19 07:26:46,372 WARN L233 SmtUtils]: Spent 42.84s on a formula simplification. DAG size of input: 2487 DAG size of output: 917 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-19 07:26:46,377 INFO L321 Elim1Store]: treesize reduction 5738, result has 28.2 percent of original size [2022-11-19 07:26:46,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 40 select indices, 40 select index equivalence classes, 0 disjoint index pairs (out of 780 index pairs), introduced 49 new quantified variables, introduced 780 case distinctions, treesize of input 107945 treesize of output 87875 [2022-11-19 07:27:00,665 WARN L233 SmtUtils]: Spent 14.28s on a formula simplification. DAG size of input: 2307 DAG size of output: 2271 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)