./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba --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 4d5c55d9a4a2ded389ff7ce077afdc88fb2d2855921e5fd1e3b93fbba7e140e8 --- 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-b5237d8 [2022-11-22 01:59:17,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:59:17,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:59:17,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:59:17,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:59:17,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:59:17,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:59:17,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:59:17,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:59:17,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:59:17,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:59:17,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:59:17,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:59:17,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:59:17,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:59:17,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:59:17,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:59:17,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:59:17,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:59:17,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:59:17,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:59:17,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:59:17,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:59:17,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:59:17,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:59:17,973 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:59:17,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:59:17,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:59:17,976 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:59:17,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:59:17,978 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:59:17,979 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:59:17,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:59:17,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:59:17,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:59:17,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:59:17,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:59:17,986 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:59:17,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:59:17,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:59:17,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:59:17,992 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:59:18,032 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:59:18,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:59:18,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:59:18,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:59:18,034 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:59:18,034 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:59:18,035 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:59:18,035 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:59:18,035 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:59:18,035 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:59:18,036 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:59:18,037 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:59:18,037 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:59:18,037 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:59:18,037 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:59:18,037 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:59:18,038 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:59:18,038 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:59:18,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:59:18,039 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:59:18,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:59:18,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:59:18,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:59:18,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:59:18,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:59:18,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:59:18,041 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:59:18,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:59:18,041 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:59:18,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:59:18,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:59:18,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:59:18,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:59:18,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:59:18,043 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:59:18,043 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:59:18,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:59:18,043 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:59:18,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:59:18,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:59:18,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:59:18,045 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_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d5c55d9a4a2ded389ff7ce077afdc88fb2d2855921e5fd1e3b93fbba7e140e8 [2022-11-22 01:59:18,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:59:18,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:59:18,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:59:18,370 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:59:18,370 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:59:18,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2022-11-22 01:59:21,368 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:59:21,698 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:59:21,699 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2022-11-22 01:59:21,716 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/data/ea452d8e5/1b46d4a94b5d4acf820541edeab23b43/FLAGe06710b22 [2022-11-22 01:59:21,730 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/data/ea452d8e5/1b46d4a94b5d4acf820541edeab23b43 [2022-11-22 01:59:21,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:59:21,735 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:59:21,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:59:21,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:59:21,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:59:21,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:59:21" (1/1) ... [2022-11-22 01:59:21,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35d72333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:59:21, skipping insertion in model container [2022-11-22 01:59:21,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:59:21" (1/1) ... [2022-11-22 01:59:21,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:59:21,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:59:22,090 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i[24275,24288] [2022-11-22 01:59:22,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:59:22,115 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:59:22,176 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i[24275,24288] [2022-11-22 01:59:22,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:59:22,210 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:59:22,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:59:22 WrapperNode [2022-11-22 01:59:22,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:59:22,212 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:59:22,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:59:22,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:59:22,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:59:22" (1/1) ... [2022-11-22 01:59:22,255 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:59:22" (1/1) ... [2022-11-22 01:59:22,287 INFO L138 Inliner]: procedures = 126, calls = 35, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2022-11-22 01:59:22,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:59:22,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:59:22,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:59:22,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:59:22,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:59:22" (1/1) ... [2022-11-22 01:59:22,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:59:22" (1/1) ... [2022-11-22 01:59:22,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:59:22" (1/1) ... [2022-11-22 01:59:22,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:59:22" (1/1) ... [2022-11-22 01:59:22,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:59:22" (1/1) ... [2022-11-22 01:59:22,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:59:22" (1/1) ... [2022-11-22 01:59:22,336 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:59:22" (1/1) ... [2022-11-22 01:59:22,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:59:22" (1/1) ... [2022-11-22 01:59:22,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:59:22,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:59:22,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:59:22,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:59:22,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:59:22" (1/1) ... [2022-11-22 01:59:22,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:59:22,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:22,393 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:59:22,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:59:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-11-22 01:59:22,442 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-11-22 01:59:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:59:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:59:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:59:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:59:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 01:59:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 01:59:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:59:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 01:59:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:59:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:59:22,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:59:22,610 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:59:22,612 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:59:22,678 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-11-22 01:59:22,865 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:59:22,912 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:59:22,912 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-22 01:59:22,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:59:22 BoogieIcfgContainer [2022-11-22 01:59:22,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:59:22,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:59:22,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:59:22,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:59:22,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:59:21" (1/3) ... [2022-11-22 01:59:22,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68cc1e48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:59:22, skipping insertion in model container [2022-11-22 01:59:22,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:59:22" (2/3) ... [2022-11-22 01:59:22,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68cc1e48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:59:22, skipping insertion in model container [2022-11-22 01:59:22,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:59:22" (3/3) ... [2022-11-22 01:59:22,927 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all_reverse.i [2022-11-22 01:59:22,947 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:59:22,947 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:59:22,995 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:59:23,003 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;@1b0d4882, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:59:23,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:59:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:23,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:59:23,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:23,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:59:23,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:59:23,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:23,023 INFO L85 PathProgramCache]: Analyzing trace with hash 111835896, now seen corresponding path program 1 times [2022-11-22 01:59:23,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:23,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203800673] [2022-11-22 01:59:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:23,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:23,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:23,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203800673] [2022-11-22 01:59:23,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203800673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:23,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:59:23,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:59:23,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813471743] [2022-11-22 01:59:23,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:23,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:59:23,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:23,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:59:23,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:59:23,436 INFO L87 Difference]: Start difference. First operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:23,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:23,514 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2022-11-22 01:59:23,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:59:23,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 01:59:23,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:23,524 INFO L225 Difference]: With dead ends: 33 [2022-11-22 01:59:23,525 INFO L226 Difference]: Without dead ends: 16 [2022-11-22 01:59:23,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:59:23,536 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:23,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:59:23,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-22 01:59:23,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2022-11-22 01:59:23,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:23,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-11-22 01:59:23,576 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 5 [2022-11-22 01:59:23,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:23,577 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-11-22 01:59:23,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:23,577 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-11-22 01:59:23,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:59:23,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:23,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:23,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:59:23,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:59:23,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:23,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1529706086, now seen corresponding path program 1 times [2022-11-22 01:59:23,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:23,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271261217] [2022-11-22 01:59:23,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:23,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:23,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:23,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271261217] [2022-11-22 01:59:23,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271261217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:23,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:59:23,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:59:23,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526211780] [2022-11-22 01:59:23,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:23,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:59:23,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:23,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:59:23,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:59:23,743 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:23,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:23,817 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-11-22 01:59:23,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:59:23,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-22 01:59:23,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:23,823 INFO L225 Difference]: With dead ends: 23 [2022-11-22 01:59:23,823 INFO L226 Difference]: Without dead ends: 20 [2022-11-22 01:59:23,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:59:23,825 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:23,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 20 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:59:23,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-22 01:59:23,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2022-11-22 01:59:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-22 01:59:23,830 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2022-11-22 01:59:23,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:23,831 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-22 01:59:23,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:23,831 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-22 01:59:23,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:59:23,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:23,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:23,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:59:23,833 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:59:23,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:23,833 INFO L85 PathProgramCache]: Analyzing trace with hash 529419845, now seen corresponding path program 1 times [2022-11-22 01:59:23,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:23,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985687625] [2022-11-22 01:59:23,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:23,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:24,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:24,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985687625] [2022-11-22 01:59:24,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985687625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:24,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785819665] [2022-11-22 01:59:24,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:24,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:24,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:24,057 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:24,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:59:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:24,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:59:24,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:24,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:24,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785819665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:24,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1878536649] [2022-11-22 01:59:24,366 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:59:24,366 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:59:24,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:59:24,381 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:59:24,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:59:24,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:24,519 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:59:24,520 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 [2022-11-22 01:59:24,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:24,548 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 [2022-11-22 01:59:24,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:24,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:24,661 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-22 01:59:24,661 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 [2022-11-22 01:59:24,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:24,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:24,745 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 01:59:24,746 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 [2022-11-22 01:59:24,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:24,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:24,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-22 01:59:24,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:24,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:24,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-22 01:59:24,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:24,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:24,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2022-11-22 01:59:24,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:24,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:24,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-22 01:59:25,220 INFO L321 Elim1Store]: treesize reduction 124, result has 24.8 percent of original size [2022-11-22 01:59:25,220 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 280 treesize of output 304 [2022-11-22 01:59:25,300 INFO L321 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2022-11-22 01:59:25,301 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 273 treesize of output 282 [2022-11-22 01:59:25,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:25,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:26,113 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:59:26,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 387 treesize of output 365 [2022-11-22 01:59:26,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:26,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:26,212 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 01:59:26,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 391 treesize of output 368 [2022-11-22 01:59:26,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:26,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:26,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 380 treesize of output 371 [2022-11-22 01:59:26,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:26,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:26,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:26,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:26,420 INFO L321 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2022-11-22 01:59:26,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 527 treesize of output 550 [2022-11-22 01:59:26,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:26,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 464 treesize of output 455 [2022-11-22 01:59:26,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:26,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:26,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:26,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:26,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 598 treesize of output 628 [2022-11-22 01:59:26,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:26,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:26,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:26,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:26,955 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-22 01:59:26,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 531 treesize of output 478 [2022-11-22 01:59:27,123 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:59:27,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 671 treesize of output 600 [2022-11-22 01:59:27,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 582 treesize of output 486 [2022-11-22 01:59:27,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 482 treesize of output 478 [2022-11-22 01:59:27,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:27,285 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 615 treesize of output 544 [2022-11-22 01:59:27,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 529 treesize of output 485 [2022-11-22 01:59:27,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:27,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 461 treesize of output 447 [2022-11-22 01:59:27,511 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 [2022-11-22 01:59:27,526 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 [2022-11-22 01:59:27,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:27,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:27,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:27,640 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 01:59:27,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 189 [2022-11-22 01:59:27,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:27,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:27,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:27,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:27,735 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-11-22 01:59:27,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 173 [2022-11-22 01:59:27,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:27,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-22 01:59:27,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:27,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 01:59:27,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:27,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 11 [2022-11-22 01:59:27,875 INFO L321 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2022-11-22 01:59:27,876 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 2 case distinctions, treesize of input 142 treesize of output 101 [2022-11-22 01:59:27,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:27,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:27,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 71 [2022-11-22 01:59:27,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 53 [2022-11-22 01:59:27,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:27,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:27,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-11-22 01:59:27,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 3 [2022-11-22 01:59:28,111 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 15 treesize of output 1 [2022-11-22 01:59:28,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:28,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:59:28,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 49 [2022-11-22 01:59:28,160 INFO L321 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-22 01:59:28,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 35 [2022-11-22 01:59:28,172 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 [2022-11-22 01:59:28,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:28,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:28,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:28,242 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 01:59:28,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 61 [2022-11-22 01:59:28,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:28,272 INFO L321 Elim1Store]: treesize reduction 51, result has 12.1 percent of original size [2022-11-22 01:59:28,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 47 [2022-11-22 01:59:28,295 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 01:59:28,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 01:59:28,308 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 15 treesize of output 1 [2022-11-22 01:59:28,378 INFO L321 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2022-11-22 01:59:28,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 46 [2022-11-22 01:59:28,410 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:59:28,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 41 [2022-11-22 01:59:28,421 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 [2022-11-22 01:59:28,447 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 15 treesize of output 1 [2022-11-22 01:59:28,535 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 [2022-11-22 01:59:28,542 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 [2022-11-22 01:59:28,550 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:59:29,381 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '213#(and (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0))) (< |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_dll_create_~data#1|) (<= 2 |ULTIMATE.start_dll_create_#in~len#1|) (<= |ULTIMATE.start_dll_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_create_~data#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_create_~len#1| 0) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_create_#res#1.offset|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:59:29,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:59:29,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:59:29,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-11-22 01:59:29,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377279980] [2022-11-22 01:59:29,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:59:29,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:59:29,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:29,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:59:29,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:59:29,383 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:29,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:29,437 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-11-22 01:59:29,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:59:29,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-22 01:59:29,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:29,439 INFO L225 Difference]: With dead ends: 28 [2022-11-22 01:59:29,439 INFO L226 Difference]: Without dead ends: 18 [2022-11-22 01:59:29,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:59:29,440 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:29,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:59:29,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-22 01:59:29,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-22 01:59:29,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-22 01:59:29,444 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2022-11-22 01:59:29,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:29,445 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-22 01:59:29,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:29,445 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-22 01:59:29,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 01:59:29,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:29,446 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:29,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 01:59:29,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:29,651 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:59:29,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:29,651 INFO L85 PathProgramCache]: Analyzing trace with hash 26640179, now seen corresponding path program 2 times [2022-11-22 01:59:29,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:29,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272295560] [2022-11-22 01:59:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:29,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:59:29,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:29,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272295560] [2022-11-22 01:59:29,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272295560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:29,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:59:29,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:59:29,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964036476] [2022-11-22 01:59:29,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:29,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:59:29,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:29,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:59:29,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:59:29,973 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:30,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:30,082 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-22 01:59:30,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:59:30,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-22 01:59:30,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:30,084 INFO L225 Difference]: With dead ends: 27 [2022-11-22 01:59:30,084 INFO L226 Difference]: Without dead ends: 18 [2022-11-22 01:59:30,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:59:30,085 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:30,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 26 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:59:30,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-22 01:59:30,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-22 01:59:30,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:30,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-11-22 01:59:30,088 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2022-11-22 01:59:30,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:30,089 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-11-22 01:59:30,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:30,089 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-11-22 01:59:30,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 01:59:30,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:30,090 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:30,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:59:30,090 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:59:30,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:30,090 INFO L85 PathProgramCache]: Analyzing trace with hash -143189158, now seen corresponding path program 1 times [2022-11-22 01:59:30,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:30,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624238967] [2022-11-22 01:59:30,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:30,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:59:30,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:30,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624238967] [2022-11-22 01:59:30,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624238967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:30,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043396237] [2022-11-22 01:59:30,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:30,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:30,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:30,226 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:30,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:59:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:30,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:59:30,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:59:30,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:59:30,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043396237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:30,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1663302341] [2022-11-22 01:59:30,457 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 01:59:30,457 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:59:30,458 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:59:30,458 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:59:30,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:59:30,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:30,495 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:59:30,496 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 [2022-11-22 01:59:30,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:30,523 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:59:30,524 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 [2022-11-22 01:59:30,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:30,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:30,571 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-22 01:59:30,572 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 [2022-11-22 01:59:30,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:30,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:30,615 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 01:59:30,616 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 [2022-11-22 01:59:30,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:30,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:30,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-22 01:59:30,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:30,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:30,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2022-11-22 01:59:30,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:30,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:30,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-22 01:59:30,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:30,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:30,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-22 01:59:30,874 INFO L321 Elim1Store]: treesize reduction 124, result has 24.8 percent of original size [2022-11-22 01:59:30,875 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 280 treesize of output 304 [2022-11-22 01:59:30,938 INFO L321 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2022-11-22 01:59:30,939 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 273 treesize of output 282 [2022-11-22 01:59:31,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:31,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:31,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:31,554 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:59:31,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 395 treesize of output 373 [2022-11-22 01:59:31,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:31,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:31,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:31,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:31,647 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 01:59:31,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 399 treesize of output 376 [2022-11-22 01:59:31,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:31,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:31,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 388 treesize of output 379 [2022-11-22 01:59:31,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:31,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:31,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:31,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:31,832 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 01:59:31,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 535 treesize of output 558 [2022-11-22 01:59:31,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:31,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:31,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 436 treesize of output 427 [2022-11-22 01:59:31,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:31,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:31,986 INFO L321 Elim1Store]: treesize reduction 90, result has 37.9 percent of original size [2022-11-22 01:59:31,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 558 treesize of output 587 [2022-11-22 01:59:32,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 115 treesize of output 65 [2022-11-22 01:59:32,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2022-11-22 01:59:32,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-22 01:59:32,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 124 treesize of output 66 [2022-11-22 01:59:32,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 42 [2022-11-22 01:59:32,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:59:32,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:32,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:32,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:32,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:32,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:32,799 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-22 01:59:32,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 891 treesize of output 838 [2022-11-22 01:59:33,277 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 [2022-11-22 01:59:33,284 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 [2022-11-22 01:59:33,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:33,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:33,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:33,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:33,363 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-22 01:59:33,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 185 [2022-11-22 01:59:33,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:33,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:33,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:33,423 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 01:59:33,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 164 [2022-11-22 01:59:33,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:33,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-22 01:59:33,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:33,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 01:59:33,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:33,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 11 [2022-11-22 01:59:33,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 67 [2022-11-22 01:59:33,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:33,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:33,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 45 [2022-11-22 01:59:33,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 3 [2022-11-22 01:59:33,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 53 [2022-11-22 01:59:33,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:33,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:33,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-11-22 01:59:33,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 3 [2022-11-22 01:59:33,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:33,850 INFO L321 Elim1Store]: treesize reduction 126, result has 0.8 percent of original size [2022-11-22 01:59:33,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 74 treesize of output 1 [2022-11-22 01:59:33,853 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:59:33,854 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:59:33,920 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 [2022-11-22 01:59:33,927 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 [2022-11-22 01:59:33,933 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:59:34,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1663302341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:34,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:59:34,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4, 4] total 10 [2022-11-22 01:59:34,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838325359] [2022-11-22 01:59:34,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:34,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:59:34,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:34,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:59:34,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:59:34,963 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:35,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:35,081 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-11-22 01:59:35,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:59:35,082 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-22 01:59:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:35,082 INFO L225 Difference]: With dead ends: 33 [2022-11-22 01:59:35,082 INFO L226 Difference]: Without dead ends: 24 [2022-11-22 01:59:35,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:59:35,083 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:35,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 13 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:59:35,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-22 01:59:35,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-11-22 01:59:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-22 01:59:35,095 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2022-11-22 01:59:35,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:35,097 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-22 01:59:35,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:35,098 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-22 01:59:35,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 01:59:35,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:35,099 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:35,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:35,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:35,303 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:59:35,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:35,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1198982187, now seen corresponding path program 1 times [2022-11-22 01:59:35,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:35,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192313295] [2022-11-22 01:59:35,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:35,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:59:35,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:35,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192313295] [2022-11-22 01:59:35,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192313295] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:35,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721175556] [2022-11-22 01:59:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:35,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:35,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:35,387 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:35,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:59:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:35,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:59:35,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:59:35,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:59:35,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721175556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:35,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1264143883] [2022-11-22 01:59:35,598 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 01:59:35,599 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:59:35,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:59:35,599 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:59:35,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:59:35,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:35,633 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:59:35,634 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 [2022-11-22 01:59:35,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:35,646 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 [2022-11-22 01:59:35,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:35,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:35,689 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 01:59:35,690 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 [2022-11-22 01:59:35,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:35,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:35,703 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 [2022-11-22 01:59:35,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:35,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:35,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-22 01:59:35,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:35,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:35,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2022-11-22 01:59:35,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:35,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:35,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-22 01:59:35,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:35,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:35,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-22 01:59:35,927 INFO L321 Elim1Store]: treesize reduction 124, result has 24.8 percent of original size [2022-11-22 01:59:35,927 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 280 treesize of output 304 [2022-11-22 01:59:35,998 INFO L321 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2022-11-22 01:59:35,998 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 273 treesize of output 282 [2022-11-22 01:59:36,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:36,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:36,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:36,499 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 01:59:36,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 291 treesize of output 277 [2022-11-22 01:59:36,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:36,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:36,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:36,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:36,574 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 01:59:36,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 295 treesize of output 280 [2022-11-22 01:59:36,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:36,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:36,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 275 [2022-11-22 01:59:36,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:36,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:36,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:36,775 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 01:59:36,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 431 treesize of output 449 [2022-11-22 01:59:36,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:36,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 362 treesize of output 353 [2022-11-22 01:59:36,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:36,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:36,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 496 treesize of output 531 [2022-11-22 01:59:36,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:36,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:36,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:36,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:36,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:36,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:36,935 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-22 01:59:36,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 445 treesize of output 400 [2022-11-22 01:59:37,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 168 treesize of output 104 [2022-11-22 01:59:37,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 68 [2022-11-22 01:59:37,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:59:37,398 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:59:37,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 770 treesize of output 687 [2022-11-22 01:59:37,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 669 treesize of output 549 [2022-11-22 01:59:37,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 642 treesize of output 622 [2022-11-22 01:59:37,594 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 [2022-11-22 01:59:37,600 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 [2022-11-22 01:59:37,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:37,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:37,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:37,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:37,668 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-22 01:59:37,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 185 [2022-11-22 01:59:37,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:37,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:37,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:37,725 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 01:59:37,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 164 [2022-11-22 01:59:37,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:37,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-22 01:59:37,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:37,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 01:59:37,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:37,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 11 [2022-11-22 01:59:37,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 67 [2022-11-22 01:59:37,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:37,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:37,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 45 [2022-11-22 01:59:37,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 3 [2022-11-22 01:59:37,943 INFO L321 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2022-11-22 01:59:37,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 65 [2022-11-22 01:59:37,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:37,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:37,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 27 [2022-11-22 01:59:37,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 3 [2022-11-22 01:59:38,101 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 19 treesize of output 1 [2022-11-22 01:59:38,109 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 [2022-11-22 01:59:38,116 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 13 treesize of output 9 [2022-11-22 01:59:38,134 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 13 treesize of output 9 [2022-11-22 01:59:38,276 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 [2022-11-22 01:59:38,284 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 13 treesize of output 9 [2022-11-22 01:59:38,292 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 13 treesize of output 9 [2022-11-22 01:59:38,300 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 19 treesize of output 1 [2022-11-22 01:59:38,477 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 [2022-11-22 01:59:38,485 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 13 treesize of output 9 [2022-11-22 01:59:38,492 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 13 treesize of output 9 [2022-11-22 01:59:38,502 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 19 treesize of output 1 [2022-11-22 01:59:38,703 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 [2022-11-22 01:59:38,709 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 [2022-11-22 01:59:38,718 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:59:39,695 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '649#(and (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0))) (< |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_dll_create_~data#1|) (<= 0 (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 2 |ULTIMATE.start_dll_create_#in~len#1|) (<= |ULTIMATE.start_dll_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_create_~data#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_dll_create_~len#1| 0) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_create_#res#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:59:39,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:59:39,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:59:39,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-22 01:59:39,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725145564] [2022-11-22 01:59:39,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:59:39,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:59:39,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:39,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:59:39,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:59:39,697 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:39,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:39,752 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-11-22 01:59:39,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:59:39,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-22 01:59:39,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:39,753 INFO L225 Difference]: With dead ends: 29 [2022-11-22 01:59:39,753 INFO L226 Difference]: Without dead ends: 26 [2022-11-22 01:59:39,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:59:39,754 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:39,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 18 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:59:39,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-22 01:59:39,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-22 01:59:39,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:39,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-11-22 01:59:39,762 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 19 [2022-11-22 01:59:39,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:39,762 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-11-22 01:59:39,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-11-22 01:59:39,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 01:59:39,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:39,763 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:39,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:39,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:39,964 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:59:39,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:39,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1711763145, now seen corresponding path program 2 times [2022-11-22 01:59:39,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:39,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572233387] [2022-11-22 01:59:39,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:39,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:40,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:40,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572233387] [2022-11-22 01:59:40,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572233387] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:40,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636000464] [2022-11-22 01:59:40,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:59:40,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:40,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:40,755 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:40,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:59:40,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:59:40,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:59:40,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 01:59:40,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:41,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:59:41,119 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 77 treesize of output 140 [2022-11-22 01:59:41,179 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:59:41,180 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 103 treesize of output 150 [2022-11-22 01:59:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:59:43,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:59:43,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636000464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:43,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:59:43,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2022-11-22 01:59:43,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813371600] [2022-11-22 01:59:43,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:43,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:59:43,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:43,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:59:43,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:59:43,206 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:43,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:43,355 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-11-22 01:59:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:59:43,356 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-22 01:59:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:43,357 INFO L225 Difference]: With dead ends: 37 [2022-11-22 01:59:43,357 INFO L226 Difference]: Without dead ends: 28 [2022-11-22 01:59:43,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:59:43,358 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:43,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:59:43,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-22 01:59:43,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-22 01:59:43,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-11-22 01:59:43,370 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 25 [2022-11-22 01:59:43,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:43,370 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-11-22 01:59:43,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-11-22 01:59:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 01:59:43,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:43,371 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-22 01:59:43,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:43,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 01:59:43,578 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:59:43,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:43,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1065062798, now seen corresponding path program 3 times [2022-11-22 01:59:43,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:43,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950163522] [2022-11-22 01:59:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:43,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:44,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:44,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950163522] [2022-11-22 01:59:44,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950163522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:44,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759069909] [2022-11-22 01:59:44,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:59:44,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:44,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:44,487 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:44,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:59:44,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:59:44,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:59:44,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-22 01:59:44,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:44,786 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-22 01:59:44,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 55 [2022-11-22 01:59:44,808 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-22 01:59:44,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 54 [2022-11-22 01:59:45,201 INFO L321 Elim1Store]: treesize reduction 39, result has 37.1 percent of original size [2022-11-22 01:59:45,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 78 [2022-11-22 01:59:45,219 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-22 01:59:45,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 51 [2022-11-22 01:59:45,276 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 [2022-11-22 01:59:45,281 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 28 treesize of output 16 [2022-11-22 01:59:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:59:45,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:59:46,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759069909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:46,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [407142172] [2022-11-22 01:59:46,054 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 01:59:46,054 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:59:46,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:59:46,055 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:59:46,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:59:46,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:46,082 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:59:46,082 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 [2022-11-22 01:59:46,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:46,106 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:59:46,107 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 [2022-11-22 01:59:46,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:46,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:46,179 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 01:59:46,180 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 [2022-11-22 01:59:46,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:46,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:46,197 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 [2022-11-22 01:59:46,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:46,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:46,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2022-11-22 01:59:46,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:46,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:46,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-22 01:59:46,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:46,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:46,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-22 01:59:46,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:46,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:46,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-22 01:59:46,407 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-11-22 01:59:46,407 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 275 treesize of output 284 [2022-11-22 01:59:46,507 INFO L321 Elim1Store]: treesize reduction 132, result has 20.0 percent of original size [2022-11-22 01:59:46,508 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 278 treesize of output 294 [2022-11-22 01:59:46,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:46,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:46,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:46,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:47,049 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-11-22 01:59:47,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 291 treesize of output 277 [2022-11-22 01:59:47,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:47,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:47,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:47,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:47,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:47,133 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 01:59:47,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 5 case distinctions, treesize of input 295 treesize of output 280 [2022-11-22 01:59:47,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:47,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:47,176 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 284 treesize of output 275 [2022-11-22 01:59:47,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:47,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:47,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:47,291 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 01:59:47,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 431 treesize of output 449 [2022-11-22 01:59:47,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:47,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 362 treesize of output 353 [2022-11-22 01:59:47,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:47,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:47,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 496 treesize of output 526 [2022-11-22 01:59:47,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:47,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:47,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:47,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:47,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:47,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:47,500 INFO L321 Elim1Store]: treesize reduction 22, result has 4.3 percent of original size [2022-11-22 01:59:47,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 4 case distinctions, treesize of input 445 treesize of output 400 [2022-11-22 01:59:47,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:47,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:47,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 477 treesize of output 424 [2022-11-22 01:59:47,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-22 01:59:47,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 404 treesize of output 374 [2022-11-22 01:59:47,763 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-11-22 01:59:47,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 537 treesize of output 458 [2022-11-22 01:59:47,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 458 treesize of output 398 [2022-11-22 01:59:47,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 383 treesize of output 353 [2022-11-22 01:59:47,899 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 [2022-11-22 01:59:47,908 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 [2022-11-22 01:59:47,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:47,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:47,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:48,008 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 01:59:48,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 184 [2022-11-22 01:59:48,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:48,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:48,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:48,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:48,065 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-11-22 01:59:48,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 178 [2022-11-22 01:59:48,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:48,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-22 01:59:48,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:48,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 01:59:48,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:48,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 11 [2022-11-22 01:59:48,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 43 [2022-11-22 01:59:48,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 3 [2022-11-22 01:59:48,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:48,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:48,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-22 01:59:48,211 INFO L321 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2022-11-22 01:59:48,212 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 2 case distinctions, treesize of input 61 treesize of output 30 [2022-11-22 01:59:48,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:48,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:48,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-22 01:59:48,411 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 13 treesize of output 9 [2022-11-22 01:59:48,418 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 13 treesize of output 9 [2022-11-22 01:59:48,426 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 [2022-11-22 01:59:48,433 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 19 treesize of output 1 [2022-11-22 01:59:48,568 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 13 treesize of output 9 [2022-11-22 01:59:48,576 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 13 treesize of output 9 [2022-11-22 01:59:48,583 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 19 treesize of output 1 [2022-11-22 01:59:48,591 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 [2022-11-22 01:59:48,753 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 19 treesize of output 1 [2022-11-22 01:59:48,760 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 13 treesize of output 9 [2022-11-22 01:59:48,766 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 [2022-11-22 01:59:48,775 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 13 treesize of output 9 [2022-11-22 01:59:48,973 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 [2022-11-22 01:59:48,982 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 [2022-11-22 01:59:48,987 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:59:50,825 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1101#(and (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0))) (< |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_dll_create_~data#1|) (<= 0 (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 2 |ULTIMATE.start_dll_create_#in~len#1|) (<= |ULTIMATE.start_dll_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_create_~data#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_dll_create_~len#1| 0) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_create_#res#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:59:50,825 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:59:50,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:59:50,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-11-22 01:59:50,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637582567] [2022-11-22 01:59:50,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:59:50,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-22 01:59:50,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:50,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-22 01:59:50,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 01:59:50,828 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:54,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:54,325 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2022-11-22 01:59:54,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-22 01:59:54,326 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-22 01:59:54,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:54,326 INFO L225 Difference]: With dead ends: 76 [2022-11-22 01:59:54,326 INFO L226 Difference]: Without dead ends: 38 [2022-11-22 01:59:54,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 44 SyntacticMatches, 11 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=788, Invalid=3634, Unknown=0, NotChecked=0, Total=4422 [2022-11-22 01:59:54,330 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 275 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:54,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 42 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:59:54,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-22 01:59:54,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-11-22 01:59:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:54,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-11-22 01:59:54,361 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2022-11-22 01:59:54,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:54,362 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-11-22 01:59:54,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:54,362 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-11-22 01:59:54,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 01:59:54,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:54,362 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-22 01:59:54,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:54,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:54,563 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:59:54,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:54,563 INFO L85 PathProgramCache]: Analyzing trace with hash -962580179, now seen corresponding path program 4 times [2022-11-22 01:59:54,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:54,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801928107] [2022-11-22 01:59:54,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:54,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:59:56,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:56,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801928107] [2022-11-22 01:59:56,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801928107] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:56,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29348787] [2022-11-22 01:59:56,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:59:56,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:56,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:56,313 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:56,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfd36ecc-1061-4bd2-93c0-751f045bbad7/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:59:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:56,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-22 01:59:56,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:56,919 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 [2022-11-22 01:59:56,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2022-11-22 01:59:56,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2022-11-22 01:59:57,032 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:59:57,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2022-11-22 01:59:57,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 01:59:57,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:57,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 32 [2022-11-22 01:59:57,146 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 11 treesize of output 15 [2022-11-22 01:59:57,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:57,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 26 [2022-11-22 01:59:57,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 29 [2022-11-22 01:59:57,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 29 [2022-11-22 01:59:57,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:57,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:57,581 INFO L321 Elim1Store]: treesize reduction 75, result has 12.8 percent of original size [2022-11-22 01:59:57,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 165 treesize of output 95 [2022-11-22 01:59:57,604 INFO L321 Elim1Store]: treesize reduction 50, result has 12.3 percent of original size [2022-11-22 01:59:57,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 35 [2022-11-22 01:59:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:59:57,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:57,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:59:57,947 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 133 treesize of output 130 [2022-11-22 01:59:57,963 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:59:57,964 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 113 treesize of output 100 [2022-11-22 02:00:01,222 INFO L321 Elim1Store]: treesize reduction 10, result has 77.3 percent of original size [2022-11-22 02:00:01,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 126 [2022-11-22 02:00:01,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:00:01,242 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 69 [2022-11-22 02:00:01,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:00:01,269 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 2 case distinctions, treesize of input 16 treesize of output 21 [2022-11-22 02:00:07,626 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 306 DAG size of output: 252 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-22 02:00:07,627 INFO L321 Elim1Store]: treesize reduction 901, result has 67.5 percent of original size [2022-11-22 02:00:07,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 46 case distinctions, treesize of input 59050 treesize of output 52642 [2022-11-22 02:00:08,425 INFO L217 Elim1Store]: Index analysis took 101 ms [2022-11-22 02:00:25,736 WARN L233 SmtUtils]: Spent 17.30s on a formula simplification that was a NOOP. DAG size: 1142 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-22 02:00:25,737 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:00:25,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 23 select indices, 23 select index equivalence classes, 0 disjoint index pairs (out of 253 index pairs), introduced 26 new quantified variables, introduced 253 case distinctions, treesize of input 101423 treesize of output 107054 [2022-11-22 02:00:30,086 INFO L217 Elim1Store]: Index analysis took 691 ms [2022-11-22 02:01:26,926 WARN L233 SmtUtils]: Spent 56.83s on a formula simplification. DAG size of input: 898 DAG size of output: 890 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-22 02:01:26,931 INFO L321 Elim1Store]: treesize reduction 34, result has 99.1 percent of original size [2022-11-22 02:01:26,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 21 select indices, 21 select index equivalence classes, 1 disjoint index pairs (out of 210 index pairs), introduced 29 new quantified variables, introduced 209 case distinctions, treesize of input 96595 treesize of output 99303 [2022-11-22 02:01:35,258 INFO L217 Elim1Store]: Index analysis took 1217 ms [2022-11-22 02:02:33,249 WARN L233 SmtUtils]: Spent 57.98s on a formula simplification. DAG size of input: 520 DAG size of output: 516 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-22 02:02:33,251 INFO L321 Elim1Store]: treesize reduction 8, result has 99.3 percent of original size [2022-11-22 02:02:33,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 22 new quantified variables, introduced 120 case distinctions, treesize of input 112699 treesize of output 112011 [2022-11-22 02:02:46,147 WARN L233 SmtUtils]: Spent 12.88s on a formula simplification. DAG size of input: 4730 DAG size of output: 4699 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 02:02:52,202 WARN L233 SmtUtils]: Spent 5.60s on a formula simplification that was a NOOP. DAG size: 4617 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 02:02:53,954 INFO L217 Elim1Store]: Index analysis took 389 ms [2022-11-22 02:02:57,477 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:02:57,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 101192 treesize of output 101075 [2022-11-22 02:03:03,486 WARN L233 SmtUtils]: Spent 6.00s on a formula simplification that was a NOOP. DAG size: 4693 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 02:03:09,877 WARN L233 SmtUtils]: Spent 5.99s on a formula simplification that was a NOOP. DAG size: 4690 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 02:03:11,498 INFO L217 Elim1Store]: Index analysis took 234 ms [2022-11-22 02:03:13,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:03:13,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 108356 treesize of output 108068 [2022-11-22 02:03:26,570 WARN L233 SmtUtils]: Spent 12.93s on a formula simplification. DAG size of input: 4787 DAG size of output: 4785 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 02:03:32,561 WARN L233 SmtUtils]: Spent 5.61s on a formula simplification that was a NOOP. DAG size: 4777 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 02:03:34,328 INFO L217 Elim1Store]: Index analysis took 545 ms [2022-11-22 02:03:42,331 WARN L233 SmtUtils]: Spent 7.99s on a formula simplification that was a NOOP. DAG size: 164 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-22 02:03:42,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:03:42,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 35 case distinctions, treesize of input 109013 treesize of output 109291 [2022-11-22 02:03:48,407 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 4925 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 02:03:54,821 WARN L233 SmtUtils]: Spent 5.99s on a formula simplification that was a NOOP. DAG size: 4912 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 02:03:56,670 INFO L217 Elim1Store]: Index analysis took 330 ms [2022-11-22 02:03:59,175 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:03:59,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 107590 treesize of output 107657 [2022-11-22 02:04:05,379 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification that was a NOOP. DAG size: 4947 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 02:04:12,054 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification that was a NOOP. DAG size: 4944 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 02:04:19,189 INFO L217 Elim1Store]: Index analysis took 5427 ms [2022-11-22 02:07:00,148 WARN L233 SmtUtils]: Spent 2.68m on a formula simplification. DAG size of input: 898 DAG size of output: 890 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-22 02:07:00,151 INFO L321 Elim1Store]: treesize reduction 34, result has 99.1 percent of original size [2022-11-22 02:07:00,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 21 select indices, 21 select index equivalence classes, 1 disjoint index pairs (out of 210 index pairs), introduced 29 new quantified variables, introduced 209 case distinctions, treesize of input 110036 treesize of output 111330 [2022-11-22 02:07:09,485 WARN L233 SmtUtils]: Spent 9.32s on a formula simplification that was a NOOP. DAG size: 5790 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 02:07:19,432 WARN L233 SmtUtils]: Spent 9.21s on a formula simplification that was a NOOP. DAG size: 5768 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 02:07:26,808 INFO L217 Elim1Store]: Index analysis took 4122 ms [2022-11-22 02:09:57,715 WARN L233 SmtUtils]: Spent 2.51m on a formula simplification. DAG size of input: 520 DAG size of output: 516 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-22 02:09:57,717 INFO L321 Elim1Store]: treesize reduction 8, result has 99.3 percent of original size [2022-11-22 02:09:57,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 22 new quantified variables, introduced 120 case distinctions, treesize of input 133932 treesize of output 131474 [2022-11-22 02:10:28,467 WARN L233 SmtUtils]: Spent 30.73s on a formula simplification. DAG size of input: 6847 DAG size of output: 6816 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 02:10:44,452 WARN L233 SmtUtils]: Spent 14.90s on a formula simplification that was a NOOP. DAG size: 6734 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 02:10:49,562 INFO L217 Elim1Store]: Index analysis took 1865 ms [2022-11-22 02:11:00,570 WARN L233 SmtUtils]: Spent 10.99s on a formula simplification that was a NOOP. DAG size: 106 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-22 02:11:00,570 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:11:00,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 117716 treesize of output 117841 [2022-11-22 02:11:15,492 WARN L233 SmtUtils]: Spent 14.91s on a formula simplification that was a NOOP. DAG size: 6810 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 02:11:30,150 WARN L233 SmtUtils]: Spent 13.80s on a formula simplification that was a NOOP. DAG size: 6807 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 02:11:35,173 INFO L217 Elim1Store]: Index analysis took 1070 ms [2022-11-22 02:11:40,417 WARN L233 SmtUtils]: Spent 5.23s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-22 02:11:40,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:11:40,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 119218 treesize of output 119210 [2022-11-22 02:12:10,227 WARN L233 SmtUtils]: Spent 29.80s on a formula simplification. DAG size of input: 6903 DAG size of output: 6901 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 02:12:26,099 WARN L233 SmtUtils]: Spent 14.88s on a formula simplification that was a NOOP. DAG size: 6893 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)