./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 --- 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-4e7fbc6 [2022-11-23 15:33:46,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:33:46,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:33:46,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:33:46,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:33:46,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:33:46,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:33:46,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:33:46,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:33:46,210 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:33:46,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:33:46,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:33:46,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:33:46,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:33:46,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:33:46,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:33:46,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:33:46,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:33:46,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:33:46,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:33:46,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:33:46,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:33:46,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:33:46,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:33:46,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:33:46,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:33:46,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:33:46,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:33:46,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:33:46,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:33:46,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:33:46,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:33:46,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:33:46,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:33:46,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:33:46,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:33:46,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:33:46,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:33:46,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:33:46,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:33:46,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:33:46,256 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 15:33:46,292 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:33:46,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:33:46,293 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:33:46,293 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:33:46,294 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:33:46,294 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:33:46,294 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:33:46,294 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:33:46,294 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:33:46,295 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:33:46,302 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:33:46,302 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:33:46,303 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:33:46,303 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:33:46,303 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:33:46,303 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:33:46,303 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:33:46,304 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:33:46,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 15:33:46,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 15:33:46,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:33:46,305 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:33:46,305 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 15:33:46,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:33:46,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:33:46,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:33:46,306 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 15:33:46,306 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 15:33:46,307 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 15:33:46,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:33:46,308 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 15:33:46,308 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:33:46,308 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:33:46,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:33:46,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:33:46,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:33:46,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:33:46,310 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:33:46,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:33:46,311 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:33:46,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:33:46,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:33:46,311 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_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 [2022-11-23 15:33:46,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:33:46,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:33:46,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:33:46,631 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:33:46,631 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:33:46,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2022-11-23 15:33:49,765 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:33:50,005 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:33:50,006 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2022-11-23 15:33:50,019 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/data/788cf0975/0832005f07c84cf8a371ff9b300ea638/FLAGc3a7186c1 [2022-11-23 15:33:50,045 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/data/788cf0975/0832005f07c84cf8a371ff9b300ea638 [2022-11-23 15:33:50,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:33:50,049 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:33:50,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:33:50,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:33:50,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:33:50,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:33:50" (1/1) ... [2022-11-23 15:33:50,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f1e94b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:50, skipping insertion in model container [2022-11-23 15:33:50,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:33:50" (1/1) ... [2022-11-23 15:33:50,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:33:50,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:33:50,522 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_1f6409fd-0efb-458f-878b-5b5fb7a28a19/sv-benchmarks/c/list-simple/sll2n_insert_equal.i[24301,24314] [2022-11-23 15:33:50,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:33:50,543 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:33:50,595 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_1f6409fd-0efb-458f-878b-5b5fb7a28a19/sv-benchmarks/c/list-simple/sll2n_insert_equal.i[24301,24314] [2022-11-23 15:33:50,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:33:50,626 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:33:50,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:50 WrapperNode [2022-11-23 15:33:50,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:33:50,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:33:50,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:33:50,630 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:33:50,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:50" (1/1) ... [2022-11-23 15:33:50,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:50" (1/1) ... [2022-11-23 15:33:50,681 INFO L138 Inliner]: procedures = 127, calls = 32, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 122 [2022-11-23 15:33:50,682 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:33:50,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:33:50,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:33:50,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:33:50,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:50" (1/1) ... [2022-11-23 15:33:50,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:50" (1/1) ... [2022-11-23 15:33:50,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:50" (1/1) ... [2022-11-23 15:33:50,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:50" (1/1) ... [2022-11-23 15:33:50,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:50" (1/1) ... [2022-11-23 15:33:50,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:50" (1/1) ... [2022-11-23 15:33:50,727 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:50" (1/1) ... [2022-11-23 15:33:50,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:50" (1/1) ... [2022-11-23 15:33:50,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:33:50,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:33:50,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:33:50,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:33:50,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:50" (1/1) ... [2022-11-23 15:33:50,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:33:50,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:50,781 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:33:50,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:33:50,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:33:50,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:33:50,825 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-11-23 15:33:50,825 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-11-23 15:33:50,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:33:50,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:33:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:33:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:33:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:33:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:33:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 15:33:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:33:50,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:33:50,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:33:50,955 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:33:50,957 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:33:51,427 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:33:51,510 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:33:51,515 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 15:33:51,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:51 BoogieIcfgContainer [2022-11-23 15:33:51,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:33:51,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:33:51,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:33:51,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:33:51,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:33:50" (1/3) ... [2022-11-23 15:33:51,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d50fa69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:33:51, skipping insertion in model container [2022-11-23 15:33:51,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:50" (2/3) ... [2022-11-23 15:33:51,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d50fa69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:33:51, skipping insertion in model container [2022-11-23 15:33:51,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:51" (3/3) ... [2022-11-23 15:33:51,532 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_insert_equal.i [2022-11-23 15:33:51,553 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:33:51,554 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2022-11-23 15:33:51,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:33:51,612 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@203710fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:33:51,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-11-23 15:33:51,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 66 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 62 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:33:51,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:33:51,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:51,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 15:33:51,623 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:33:51,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:51,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1158345950, now seen corresponding path program 1 times [2022-11-23 15:33:51,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:51,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468393105] [2022-11-23 15:33:51,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:51,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:51,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:33:51,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:51,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468393105] [2022-11-23 15:33:51,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468393105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:51,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:51,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:33:51,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566303705] [2022-11-23 15:33:51,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:51,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:33:51,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:51,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:33:51,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:33:51,978 INFO L87 Difference]: Start difference. First operand has 66 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 62 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:52,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:52,117 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-11-23 15:33:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:33:52,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 15:33:52,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:52,137 INFO L225 Difference]: With dead ends: 64 [2022-11-23 15:33:52,137 INFO L226 Difference]: Without dead ends: 62 [2022-11-23 15:33:52,138 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 [2022-11-23 15:33:52,143 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:52,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 81 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:33:52,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-23 15:33:52,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-23 15:33:52,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 58 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:33:52,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2022-11-23 15:33:52,179 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 6 [2022-11-23 15:33:52,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:52,180 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2022-11-23 15:33:52,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:52,180 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2022-11-23 15:33:52,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:33:52,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:52,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 15:33:52,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:33:52,182 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:33:52,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:52,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1158345951, now seen corresponding path program 1 times [2022-11-23 15:33:52,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:52,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953759849] [2022-11-23 15:33:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:52,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:33:52,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:52,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953759849] [2022-11-23 15:33:52,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953759849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:52,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:52,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:33:52,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144068740] [2022-11-23 15:33:52,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:52,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:33:52,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:52,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:33:52,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:33:52,314 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:52,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:52,420 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2022-11-23 15:33:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:33:52,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 15:33:52,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:52,423 INFO L225 Difference]: With dead ends: 60 [2022-11-23 15:33:52,423 INFO L226 Difference]: Without dead ends: 60 [2022-11-23 15:33:52,423 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 [2022-11-23 15:33:52,425 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:52,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 83 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:33:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-23 15:33:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-23 15:33:52,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 30 states have (on average 2.066666666666667) internal successors, (62), 56 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:33:52,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-11-23 15:33:52,432 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 6 [2022-11-23 15:33:52,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:52,432 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-11-23 15:33:52,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:52,433 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-11-23 15:33:52,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 15:33:52,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:52,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:52,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:33:52,434 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:33:52,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:52,434 INFO L85 PathProgramCache]: Analyzing trace with hash 719548506, now seen corresponding path program 1 times [2022-11-23 15:33:52,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:52,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028252079] [2022-11-23 15:33:52,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:52,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:33:52,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:52,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028252079] [2022-11-23 15:33:52,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028252079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:52,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:52,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:33:52,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106480488] [2022-11-23 15:33:52,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:52,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:33:52,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:52,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:33:52,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:33:52,592 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 15:33:52,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:52,760 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-11-23 15:33:52,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:33:52,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-23 15:33:52,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:52,764 INFO L225 Difference]: With dead ends: 62 [2022-11-23 15:33:52,764 INFO L226 Difference]: Without dead ends: 62 [2022-11-23 15:33:52,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:33:52,766 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:52,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 167 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:33:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-23 15:33:52,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-11-23 15:33:52,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 30 states have (on average 2.033333333333333) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:33:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2022-11-23 15:33:52,774 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 10 [2022-11-23 15:33:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:52,775 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2022-11-23 15:33:52,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 15:33:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2022-11-23 15:33:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 15:33:52,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:52,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:52,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:33:52,777 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:33:52,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:52,778 INFO L85 PathProgramCache]: Analyzing trace with hash 719548507, now seen corresponding path program 1 times [2022-11-23 15:33:52,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:52,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056584962] [2022-11-23 15:33:52,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:52,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:33:53,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:53,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056584962] [2022-11-23 15:33:53,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056584962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:53,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:53,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:33:53,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295906241] [2022-11-23 15:33:53,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:53,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:33:53,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:53,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:33:53,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:33:53,003 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 15:33:53,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:53,163 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-11-23 15:33:53,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:33:53,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-23 15:33:53,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:53,165 INFO L225 Difference]: With dead ends: 61 [2022-11-23 15:33:53,165 INFO L226 Difference]: Without dead ends: 61 [2022-11-23 15:33:53,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:33:53,167 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 4 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:53,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 179 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:33:53,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-23 15:33:53,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-11-23 15:33:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 30 states have (on average 2.0) internal successors, (60), 54 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:33:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-11-23 15:33:53,173 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 10 [2022-11-23 15:33:53,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:53,173 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-11-23 15:33:53,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 15:33:53,174 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-11-23 15:33:53,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 15:33:53,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:53,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:53,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:33:53,175 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:33:53,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:53,176 INFO L85 PathProgramCache]: Analyzing trace with hash 967811835, now seen corresponding path program 1 times [2022-11-23 15:33:53,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:53,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261415424] [2022-11-23 15:33:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:53,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:33:53,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:53,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261415424] [2022-11-23 15:33:53,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261415424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:53,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:53,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:33:53,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149882964] [2022-11-23 15:33:53,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:53,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:33:53,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:53,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:33:53,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:33:53,244 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 15:33:53,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:53,277 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2022-11-23 15:33:53,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:33:53,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-23 15:33:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:53,278 INFO L225 Difference]: With dead ends: 62 [2022-11-23 15:33:53,278 INFO L226 Difference]: Without dead ends: 62 [2022-11-23 15:33:53,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:33:53,280 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:53,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 97 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:33:53,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-23 15:33:53,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-11-23 15:33:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 31 states have (on average 1.967741935483871) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:33:53,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2022-11-23 15:33:53,296 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 10 [2022-11-23 15:33:53,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:53,296 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2022-11-23 15:33:53,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 15:33:53,297 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2022-11-23 15:33:53,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 15:33:53,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:53,298 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:53,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:33:53,298 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:33:53,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:53,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1529051507, now seen corresponding path program 1 times [2022-11-23 15:33:53,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:53,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24928555] [2022-11-23 15:33:53,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:53,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:33:53,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:53,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24928555] [2022-11-23 15:33:53,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24928555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:53,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276286225] [2022-11-23 15:33:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:53,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:53,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:53,400 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:53,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:33:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:53,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:33:53,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:33:53,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:33:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:33:53,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276286225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:33:53,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1314422899] [2022-11-23 15:33:53,668 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 15:33:53,668 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:33:53,672 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:33:53,678 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:33:53,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:33:53,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,763 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 [2022-11-23 15:33:53,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:33:53,917 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 [2022-11-23 15:33:53,925 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 [2022-11-23 15:33:53,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:33:53,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:33:53,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:33:53,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:33:53,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,991 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 25 treesize of output 13 [2022-11-23 15:33:54,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,006 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 25 treesize of output 13 [2022-11-23 15:33:54,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:33:54,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:33:54,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:33:54,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 15:33:54,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 15:33:54,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,347 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 [2022-11-23 15:33:54,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,404 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:33:54,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:33:54,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:33:54,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:33:54,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:33:54,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:33:54,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:33:54,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,535 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:33:54,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:33:54,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:33:54,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:33:54,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:33:54,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:33:54,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:33:54,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 218 [2022-11-23 15:33:54,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,883 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 220 [2022-11-23 15:33:54,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,900 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 230 [2022-11-23 15:33:54,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,981 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:33:54,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:33:55,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:33:55,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:33:55,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:33:55,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:33:55,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:33:55,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:55,145 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:33:55,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:33:55,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:33:55,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:33:55,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:33:55,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:33:55,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:33:55,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:55,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 218 [2022-11-23 15:33:55,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:55,366 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 220 [2022-11-23 15:33:55,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:55,380 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 230 [2022-11-23 15:33:55,620 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 7 treesize of output 3 [2022-11-23 15:33:55,639 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 7 treesize of output 3 [2022-11-23 15:33:55,736 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 7 treesize of output 3 [2022-11-23 15:33:55,755 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 7 treesize of output 3 [2022-11-23 15:33:56,063 INFO L321 Elim1Store]: treesize reduction 62, result has 24.4 percent of original size [2022-11-23 15:33:56,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 248 treesize of output 254 [2022-11-23 15:33:56,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:56,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 15:33:56,184 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 11 for LOIs [2022-11-23 15:33:56,191 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 [2022-11-23 15:33:56,196 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 [2022-11-23 15:33:56,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:33:56,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:33:56,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:33:56,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:33:56,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:56,238 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 25 treesize of output 13 [2022-11-23 15:33:56,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:56,247 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 25 treesize of output 13 [2022-11-23 15:33:56,249 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:34:00,389 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '814#(and (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= |ULTIMATE.start_sll_insert_~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~data#1| 1) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (or (and (= 1 (select |#valid| |ULTIMATE.start_sll_insert_~new_node~0#1.base|)) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_main_~#s~0#1.offset| |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= |ULTIMATE.start_sll_insert_#in~index#1| (ite (and (not (= (mod |ULTIMATE.start_main_~len~0#1| 2) 0)) (< |ULTIMATE.start_main_~len~0#1| 0)) (+ (div |ULTIMATE.start_main_~len~0#1| 2) 1) (div |ULTIMATE.start_main_~len~0#1| 2))) (= |ULTIMATE.start_sll_insert_#in~index#1| |ULTIMATE.start_sll_insert_~index#1|) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (not (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| 0)) (= |ULTIMATE.start_sll_insert_~head#1.offset| |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4) 0) (= |ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select |#length| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 8) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.offset| 0) (< |ULTIMATE.start_sll_insert_~new_node~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_sll_insert_#in~data#1| |ULTIMATE.start_main_~data~0#1|) (= |ULTIMATE.start_sll_insert_~data#1| (select (select |#memory_int| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0)) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_sll_insert_~head#1.base|) (= |#NULL.base| 0)) (and (= 1 (select |#valid| |ULTIMATE.start_sll_insert_~new_node~0#1.base|)) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_main_~#s~0#1.offset| |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= |ULTIMATE.start_sll_insert_#in~index#1| (ite (and (not (= (mod |ULTIMATE.start_main_~len~0#1| 2) 0)) (< |ULTIMATE.start_main_~len~0#1| 0)) (+ (div |ULTIMATE.start_main_~len~0#1| 2) 1) (div |ULTIMATE.start_main_~len~0#1| 2))) (= |ULTIMATE.start_sll_insert_#in~index#1| |ULTIMATE.start_sll_insert_~index#1|) (= |ULTIMATE.start_sll_create_~head~0#1.base| 0) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (not (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| 0)) (= |ULTIMATE.start_sll_insert_~head#1.offset| |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4) 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select |#length| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 8) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.offset| 0) (< |ULTIMATE.start_sll_insert_~new_node~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_sll_insert_#in~data#1| |ULTIMATE.start_main_~data~0#1|) (= |ULTIMATE.start_sll_insert_~data#1| (select (select |#memory_int| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0)) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_sll_insert_~head#1.base|) (= |#NULL.base| 0))) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_sll_insert_~data#1|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (not (= (select |#valid| |ULTIMATE.start_sll_insert_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|))' at error location [2022-11-23 15:34:00,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:34:00,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:34:00,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-11-23 15:34:00,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404540574] [2022-11-23 15:34:00,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:34:00,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:34:00,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:00,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:34:00,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:34:00,392 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 15:34:00,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:00,459 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2022-11-23 15:34:00,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:34:00,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 19 [2022-11-23 15:34:00,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:00,460 INFO L225 Difference]: With dead ends: 63 [2022-11-23 15:34:00,460 INFO L226 Difference]: Without dead ends: 63 [2022-11-23 15:34:00,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:34:00,461 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:00,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 145 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:34:00,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-23 15:34:00,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-23 15:34:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 58 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:34:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-11-23 15:34:00,467 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 19 [2022-11-23 15:34:00,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:00,467 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-11-23 15:34:00,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 15:34:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-11-23 15:34:00,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 15:34:00,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:00,469 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:00,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:34:00,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:00,675 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:34:00,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:00,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2086766395, now seen corresponding path program 2 times [2022-11-23 15:34:00,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:00,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741037026] [2022-11-23 15:34:00,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:00,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 15:34:01,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:01,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741037026] [2022-11-23 15:34:01,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741037026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:34:01,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589080738] [2022-11-23 15:34:01,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:34:01,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:01,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:34:01,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:34:01,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:34:01,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:34:01,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:34:01,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 15:34:01,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:34:01,402 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 [2022-11-23 15:34:01,446 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 5 treesize of output 3 [2022-11-23 15:34:01,466 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_242 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_242))) is different from true [2022-11-23 15:34:01,476 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_242 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_242))) is different from true [2022-11-23 15:34:01,508 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:34:01,508 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 18 [2022-11-23 15:34:01,640 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:34:01,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:34:01,651 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_243 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_243))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-23 15:34:01,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:01,709 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-23 15:34:01,710 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 2 case distinctions, treesize of input 17 treesize of output 26 [2022-11-23 15:34:01,809 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 5 treesize of output 3 [2022-11-23 15:34:01,825 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_245 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_245))))) is different from true [2022-11-23 15:34:01,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:01,865 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 14 [2022-11-23 15:34:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 12 not checked. [2022-11-23 15:34:01,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:34:01,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589080738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:34:01,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [260413529] [2022-11-23 15:34:01,984 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 15:34:01,984 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:34:01,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:34:01,985 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:34:01,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:34:02,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:02,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:02,011 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 [2022-11-23 15:34:02,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:02,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:02,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:34:02,064 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 [2022-11-23 15:34:02,070 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 [2022-11-23 15:34:02,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:34:02,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:34:02,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:34:02,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:02,107 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 25 treesize of output 13 [2022-11-23 15:34:02,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:02,116 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 25 treesize of output 13 [2022-11-23 15:34:02,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:34:02,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:02,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:02,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:34:02,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:02,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:02,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:34:02,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:02,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:02,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:34:02,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:02,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 15:34:02,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:02,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 15:34:02,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:02,295 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 [2022-11-23 15:34:02,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:02,331 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:34:02,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:34:02,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:02,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:02,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:34:02,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:34:02,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:34:02,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:02,450 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:34:02,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:34:02,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:34:02,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:02,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:02,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:34:02,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:34:02,582 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 [2022-11-23 15:34:02,590 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 [2022-11-23 15:34:02,599 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 [2022-11-23 15:34:02,636 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 19 treesize of output 7 [2022-11-23 15:34:02,646 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 5 treesize of output 3 [2022-11-23 15:34:02,682 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 7 treesize of output 5 [2022-11-23 15:34:02,721 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 19 treesize of output 7 [2022-11-23 15:34:02,732 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 5 treesize of output 3 [2022-11-23 15:34:02,741 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 7 treesize of output 5 [2022-11-23 15:34:02,781 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 [2022-11-23 15:34:02,788 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 [2022-11-23 15:34:02,796 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 [2022-11-23 15:34:03,000 INFO L321 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2022-11-23 15:34:03,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 217 [2022-11-23 15:34:03,631 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:34:03,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 645 treesize of output 651 [2022-11-23 15:34:04,526 INFO L321 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2022-11-23 15:34:04,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 217 [2022-11-23 15:34:05,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:34:05,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 892 treesize of output 898 [2022-11-23 15:34:05,712 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 7 treesize of output 3 [2022-11-23 15:34:05,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:34:05,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 155 treesize of output 188 [2022-11-23 15:34:05,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 147 treesize of output 139 [2022-11-23 15:34:05,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:05,805 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:34:05,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 147 treesize of output 131 [2022-11-23 15:34:05,824 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 5 treesize of output 3 [2022-11-23 15:34:06,142 INFO L321 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2022-11-23 15:34:06,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 217 [2022-11-23 15:34:06,380 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 5 treesize of output 3 [2022-11-23 15:34:06,399 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 5 treesize of output 3 [2022-11-23 15:34:06,411 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 15:34:06,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:34:06,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 155 treesize of output 188 [2022-11-23 15:34:06,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 147 treesize of output 139 [2022-11-23 15:34:06,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:06,582 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:34:06,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 147 treesize of output 131 [2022-11-23 15:34:06,604 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 5 treesize of output 3 [2022-11-23 15:34:06,856 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 7 treesize of output 3 [2022-11-23 15:34:07,101 INFO L321 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2022-11-23 15:34:07,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 188 treesize of output 234 [2022-11-23 15:34:07,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:34:07,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2022-11-23 15:34:07,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:34:07,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 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 5 treesize of output 3 [2022-11-23 15:34:07,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:34:07,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:34:07,561 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 20 for LOIs [2022-11-23 15:34:07,589 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 [2022-11-23 15:34:07,595 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 [2022-11-23 15:34:07,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:34:07,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:34:07,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:34:07,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:07,641 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 25 treesize of output 13 [2022-11-23 15:34:07,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:34:07,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:07,658 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 25 treesize of output 13 [2022-11-23 15:34:07,660 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:34:09,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1063#(and (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_insert_~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~new_head~0#1.offset|) (<= 0 |ULTIMATE.start_sll_insert_~head#1.base|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.offset|) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 1 |ULTIMATE.start_sll_insert_#in~data#1|) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= |ULTIMATE.start_sll_insert_~data#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_sll_insert_#in~data#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |ULTIMATE.start_sll_insert_~head#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_sll_insert_~data#1|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (not (= (select |#valid| |ULTIMATE.start_sll_insert_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-23 15:34:09,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:34:09,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:34:09,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2022-11-23 15:34:09,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543848205] [2022-11-23 15:34:09,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:34:09,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 15:34:09,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:09,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 15:34:09,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=726, Unknown=4, NotChecked=228, Total=1056 [2022-11-23 15:34:09,529 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 20 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 15:34:09,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:09,949 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2022-11-23 15:34:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:34:09,950 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2022-11-23 15:34:09,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:09,950 INFO L225 Difference]: With dead ends: 69 [2022-11-23 15:34:09,951 INFO L226 Difference]: Without dead ends: 69 [2022-11-23 15:34:09,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=124, Invalid=880, Unknown=4, NotChecked=252, Total=1260 [2022-11-23 15:34:09,952 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 146 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:09,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 180 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 321 Invalid, 0 Unknown, 292 Unchecked, 0.3s Time] [2022-11-23 15:34:09,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-23 15:34:09,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2022-11-23 15:34:09,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 54 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:34:09,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-11-23 15:34:09,957 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 28 [2022-11-23 15:34:09,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:09,957 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-11-23 15:34:09,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 15:34:09,958 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-11-23 15:34:09,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 15:34:09,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:09,959 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:09,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:34:10,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:10,165 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:34:10,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:10,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2086766396, now seen corresponding path program 1 times [2022-11-23 15:34:10,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:10,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673232296] [2022-11-23 15:34:10,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:10,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:34:10,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:10,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673232296] [2022-11-23 15:34:10,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673232296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:34:10,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261083453] [2022-11-23 15:34:10,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:10,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:10,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:34:10,911 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:34:10,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:34:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:11,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 15:34:11,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:34:11,072 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 [2022-11-23 15:34:11,113 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 5 treesize of output 3 [2022-11-23 15:34:11,125 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_362 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_362))))) is different from true [2022-11-23 15:34:11,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:11,159 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 14 [2022-11-23 15:34:11,186 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 5 treesize of output 3 [2022-11-23 15:34:11,197 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_363 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_363) |c_#length|)))) is different from true [2022-11-23 15:34:11,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:11,223 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 14 [2022-11-23 15:34:11,272 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 5 treesize of output 3 [2022-11-23 15:34:11,281 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_364 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_364) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-23 15:34:11,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:11,313 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 14 [2022-11-23 15:34:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 12 not checked. [2022-11-23 15:34:11,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:34:13,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261083453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:34:13,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1335834599] [2022-11-23 15:34:13,499 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 15:34:13,499 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:34:13,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:34:13,500 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:34:13,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:34:13,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,522 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 [2022-11-23 15:34:13,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:34:13,570 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 [2022-11-23 15:34:13,574 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 [2022-11-23 15:34:13,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:34:13,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:34:13,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:34:13,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,600 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 25 treesize of output 13 [2022-11-23 15:34:13,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,610 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 25 treesize of output 13 [2022-11-23 15:34:13,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:34:13,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:34:13,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:34:13,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:34:13,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,839 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 209 [2022-11-23 15:34:13,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,855 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 209 [2022-11-23 15:34:13,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,873 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 109 [2022-11-23 15:34:13,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,931 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:34:13,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:34:13,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:13,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:34:13,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:14,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:34:14,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:34:14,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:14,042 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:34:14,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:34:14,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:34:14,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:14,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:14,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:34:14,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:34:14,174 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 [2022-11-23 15:34:14,183 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 [2022-11-23 15:34:14,199 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 [2022-11-23 15:34:14,287 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 5 treesize of output 3 [2022-11-23 15:34:14,298 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 57 treesize of output 51 [2022-11-23 15:34:14,307 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 70 treesize of output 52 [2022-11-23 15:34:14,331 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 7 treesize of output 5 [2022-11-23 15:34:14,410 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 7 treesize of output 5 [2022-11-23 15:34:14,420 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 5 treesize of output 3 [2022-11-23 15:34:14,431 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 57 treesize of output 51 [2022-11-23 15:34:14,440 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 70 treesize of output 52 [2022-11-23 15:34:14,496 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 [2022-11-23 15:34:14,505 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 [2022-11-23 15:34:14,523 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 [2022-11-23 15:34:14,693 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 7 treesize of output 3 [2022-11-23 15:34:14,710 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 7 treesize of output 3 [2022-11-23 15:34:14,790 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 7 treesize of output 3 [2022-11-23 15:34:14,802 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 7 treesize of output 3 [2022-11-23 15:34:14,972 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 20 for LOIs [2022-11-23 15:34:14,982 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 [2022-11-23 15:34:14,992 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 [2022-11-23 15:34:15,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:34:15,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:34:15,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:34:15,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:34:15,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:15,048 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 25 treesize of output 13 [2022-11-23 15:34:15,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:15,058 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 25 treesize of output 13 [2022-11-23 15:34:15,062 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:34:18,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1321#(and (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0) (< (select |#length| |ULTIMATE.start_sll_insert_~head#1.base|) (+ |ULTIMATE.start_sll_insert_~head#1.offset| 4)) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= |ULTIMATE.start_sll_insert_~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~data#1| 1) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (or (and (= 1 (select |#valid| |ULTIMATE.start_sll_insert_~new_node~0#1.base|)) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_main_~#s~0#1.offset| |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= |ULTIMATE.start_sll_insert_#in~index#1| (ite (and (not (= (mod |ULTIMATE.start_main_~len~0#1| 2) 0)) (< |ULTIMATE.start_main_~len~0#1| 0)) (+ (div |ULTIMATE.start_main_~len~0#1| 2) 1) (div |ULTIMATE.start_main_~len~0#1| 2))) (= |ULTIMATE.start_sll_insert_#in~index#1| |ULTIMATE.start_sll_insert_~index#1|) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (not (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| 0)) (= |ULTIMATE.start_sll_insert_~head#1.offset| |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4) 0) (= |ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select |#length| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 8) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.offset| 0) (< |ULTIMATE.start_sll_insert_~new_node~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_sll_insert_#in~data#1| |ULTIMATE.start_main_~data~0#1|) (= |ULTIMATE.start_sll_insert_~data#1| (select (select |#memory_int| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0)) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_sll_insert_~head#1.base|) (= |#NULL.base| 0)) (and (= 1 (select |#valid| |ULTIMATE.start_sll_insert_~new_node~0#1.base|)) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_main_~#s~0#1.offset| |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= |ULTIMATE.start_sll_insert_#in~index#1| (ite (and (not (= (mod |ULTIMATE.start_main_~len~0#1| 2) 0)) (< |ULTIMATE.start_main_~len~0#1| 0)) (+ (div |ULTIMATE.start_main_~len~0#1| 2) 1) (div |ULTIMATE.start_main_~len~0#1| 2))) (= |ULTIMATE.start_sll_insert_#in~index#1| |ULTIMATE.start_sll_insert_~index#1|) (= |ULTIMATE.start_sll_create_~head~0#1.base| 0) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (not (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| 0)) (= |ULTIMATE.start_sll_insert_~head#1.offset| |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4) 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select |#length| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 8) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.offset| 0) (< |ULTIMATE.start_sll_insert_~new_node~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_sll_insert_#in~data#1| |ULTIMATE.start_main_~data~0#1|) (= |ULTIMATE.start_sll_insert_~data#1| (select (select |#memory_int| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0)) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_sll_insert_~head#1.base|) (= |#NULL.base| 0))) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_sll_insert_~data#1|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|))' at error location [2022-11-23 15:34:18,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:34:18,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:34:18,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 18 [2022-11-23 15:34:18,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496339842] [2022-11-23 15:34:18,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:34:18,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 15:34:18,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:18,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 15:34:18,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=833, Unknown=3, NotChecked=180, Total=1122 [2022-11-23 15:34:18,190 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 20 states, 14 states have (on average 2.857142857142857) internal successors, (40), 17 states have internal predecessors, (40), 4 states have call successors, (4), 2 states have call predecessors, (4), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 15:34:18,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:18,539 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2022-11-23 15:34:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:34:18,539 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 2.857142857142857) internal successors, (40), 17 states have internal predecessors, (40), 4 states have call successors, (4), 2 states have call predecessors, (4), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 28 [2022-11-23 15:34:18,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:18,540 INFO L225 Difference]: With dead ends: 65 [2022-11-23 15:34:18,540 INFO L226 Difference]: Without dead ends: 65 [2022-11-23 15:34:18,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=136, Invalid=995, Unknown=3, NotChecked=198, Total=1332 [2022-11-23 15:34:18,542 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 126 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:18,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 90 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 239 Invalid, 0 Unknown, 156 Unchecked, 0.2s Time] [2022-11-23 15:34:18,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-23 15:34:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2022-11-23 15:34:18,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 50 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:34:18,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2022-11-23 15:34:18,546 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 28 [2022-11-23 15:34:18,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:18,547 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2022-11-23 15:34:18,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 2.857142857142857) internal successors, (40), 17 states have internal predecessors, (40), 4 states have call successors, (4), 2 states have call predecessors, (4), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 15:34:18,547 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2022-11-23 15:34:18,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 15:34:18,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:18,548 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:18,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 15:34:18,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 15:34:18,754 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:34:18,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:18,755 INFO L85 PathProgramCache]: Analyzing trace with hash -367098340, now seen corresponding path program 1 times [2022-11-23 15:34:18,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:18,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958156529] [2022-11-23 15:34:18,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:18,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:34:19,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:19,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958156529] [2022-11-23 15:34:19,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958156529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:34:19,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500366176] [2022-11-23 15:34:19,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:19,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:19,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:34:19,388 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:34:19,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:34:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:19,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-23 15:34:19,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:34:19,694 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 9 treesize of output 5 [2022-11-23 15:34:19,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:19,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 15:34:19,854 INFO L321 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2022-11-23 15:34:19,854 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 18 treesize of output 13 [2022-11-23 15:34:19,916 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 17 treesize of output 9 [2022-11-23 15:34:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:34:19,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:34:19,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500366176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:34:19,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:34:19,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 20 [2022-11-23 15:34:19,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550056698] [2022-11-23 15:34:19,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:34:19,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 15:34:19,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:19,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 15:34:19,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=358, Unknown=2, NotChecked=0, Total=420 [2022-11-23 15:34:19,945 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 11 states, 8 states have (on average 2.25) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:34:20,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:20,366 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2022-11-23 15:34:20,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 15:34:20,367 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.25) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-11-23 15:34:20,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:20,367 INFO L225 Difference]: With dead ends: 99 [2022-11-23 15:34:20,367 INFO L226 Difference]: Without dead ends: 99 [2022-11-23 15:34:20,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=497, Unknown=2, NotChecked=0, Total=600 [2022-11-23 15:34:20,368 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 166 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 6 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:20,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 131 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 220 Invalid, 21 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:34:20,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-23 15:34:20,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 57. [2022-11-23 15:34:20,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 52 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:34:20,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2022-11-23 15:34:20,374 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 30 [2022-11-23 15:34:20,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:20,374 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2022-11-23 15:34:20,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.25) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:34:20,375 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2022-11-23 15:34:20,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 15:34:20,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:20,376 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:20,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:34:20,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:20,582 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:34:20,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:20,582 INFO L85 PathProgramCache]: Analyzing trace with hash -367098339, now seen corresponding path program 1 times [2022-11-23 15:34:20,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:20,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043341415] [2022-11-23 15:34:20,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:20,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:34:21,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:21,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043341415] [2022-11-23 15:34:21,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043341415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:34:21,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717778748] [2022-11-23 15:34:21,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:21,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:21,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:34:21,601 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:34:21,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:34:21,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:21,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-23 15:34:21,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:34:21,820 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 [2022-11-23 15:34:22,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-23 15:34:22,123 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 21 treesize of output 13 [2022-11-23 15:34:22,241 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_600 (Array Int Int)) (|node_create_~temp~0#1.base| Int) (v_ArrVal_599 (Array Int Int))) (and (= (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_600) |c_#memory_$Pointer$.offset|) (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_599)) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-11-23 15:34:22,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:22,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-11-23 15:34:22,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:22,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-11-23 15:34:22,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:22,274 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 24 treesize of output 19 [2022-11-23 15:34:22,286 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-23 15:34:22,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:34:22,334 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 23 treesize of output 15 [2022-11-23 15:34:22,337 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 [2022-11-23 15:34:22,374 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2022-11-23 15:34:22,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:34:22,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717778748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:34:22,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1486708699] [2022-11-23 15:34:22,615 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-23 15:34:22,615 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:34:22,616 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:34:22,616 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:34:22,616 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:34:22,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:22,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:22,637 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 [2022-11-23 15:34:22,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:22,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:22,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:34:22,694 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 [2022-11-23 15:34:22,698 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 [2022-11-23 15:34:22,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:34:22,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:34:22,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:34:22,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:34:22,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:22,729 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 25 treesize of output 13 [2022-11-23 15:34:22,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:22,735 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 25 treesize of output 13 [2022-11-23 15:34:22,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:22,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:22,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:34:22,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:22,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:22,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:34:22,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:22,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:22,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:34:22,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:22,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:22,900 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 209 [2022-11-23 15:34:22,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:22,913 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 209 [2022-11-23 15:34:22,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:22,927 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 109 [2022-11-23 15:34:22,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:22,969 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:34:22,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:34:23,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:34:23,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:23,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:23,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:34:23,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:34:23,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:23,072 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:34:23,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:34:23,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:34:23,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:23,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:34:23,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:23,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:34:23,205 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 [2022-11-23 15:34:23,214 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 [2022-11-23 15:34:23,272 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 [2022-11-23 15:34:23,375 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 5 treesize of output 3 [2022-11-23 15:34:23,383 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 7 treesize of output 5 [2022-11-23 15:34:23,400 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 76 treesize of output 58 [2022-11-23 15:34:23,412 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 51 treesize of output 45 [2022-11-23 15:34:23,527 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 5 treesize of output 3 [2022-11-23 15:34:23,538 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 7 treesize of output 5 [2022-11-23 15:34:23,550 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 57 treesize of output 51 [2022-11-23 15:34:23,559 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 70 treesize of output 52 [2022-11-23 15:34:23,620 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 [2022-11-23 15:34:23,631 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 [2022-11-23 15:34:23,645 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 [2022-11-23 15:34:23,793 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 7 treesize of output 3 [2022-11-23 15:34:23,821 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 7 treesize of output 3 [2022-11-23 15:34:23,902 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 7 treesize of output 3 [2022-11-23 15:34:23,912 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 7 treesize of output 3 [2022-11-23 15:34:24,135 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 20 for LOIs [2022-11-23 15:34:24,148 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 [2022-11-23 15:34:24,155 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 [2022-11-23 15:34:24,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:34:24,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:34:24,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:34:24,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:24,200 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 25 treesize of output 13 [2022-11-23 15:34:24,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:24,207 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 25 treesize of output 13 [2022-11-23 15:34:24,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:34:24,218 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:34:28,980 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1862#(and (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| |ULTIMATE.start_sll_insert_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= (+ |ULTIMATE.start_sll_insert_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_insert_~head#1.base|)) (or (not (<= 0 (+ |ULTIMATE.start_sll_insert_~last~0#1.offset| 4))) (not (<= (+ |ULTIMATE.start_sll_insert_~last~0#1.offset| 8) (select |#length| |ULTIMATE.start_sll_insert_~last~0#1.base|)))) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~head#1.base|) |ULTIMATE.start_sll_insert_~head#1.offset|) |ULTIMATE.start_sll_insert_~last~0#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_insert_~last~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~head#1.base|) |ULTIMATE.start_sll_insert_~head#1.offset|)) (= (select |#valid| |ULTIMATE.start_sll_insert_~head#1.base|) 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= |ULTIMATE.start_sll_insert_~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~data#1| 1) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (or (and (= 1 (select |#valid| |ULTIMATE.start_sll_insert_~new_node~0#1.base|)) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_main_~#s~0#1.offset| |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= |ULTIMATE.start_sll_insert_#in~index#1| (ite (and (not (= (mod |ULTIMATE.start_main_~len~0#1| 2) 0)) (< |ULTIMATE.start_main_~len~0#1| 0)) (+ (div |ULTIMATE.start_main_~len~0#1| 2) 1) (div |ULTIMATE.start_main_~len~0#1| 2))) (= |ULTIMATE.start_sll_insert_#in~index#1| |ULTIMATE.start_sll_insert_~index#1|) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (not (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| 0)) (= |ULTIMATE.start_sll_insert_~head#1.offset| |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4) 0) (= |ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select |#length| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 8) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.offset| 0) (< |ULTIMATE.start_sll_insert_~new_node~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_sll_insert_#in~data#1| |ULTIMATE.start_main_~data~0#1|) (= |ULTIMATE.start_sll_insert_~data#1| (select (select |#memory_int| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0)) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_sll_insert_~head#1.base|) (= |#NULL.base| 0)) (and (= 1 (select |#valid| |ULTIMATE.start_sll_insert_~new_node~0#1.base|)) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_main_~#s~0#1.offset| |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= |ULTIMATE.start_sll_insert_#in~index#1| (ite (and (not (= (mod |ULTIMATE.start_main_~len~0#1| 2) 0)) (< |ULTIMATE.start_main_~len~0#1| 0)) (+ (div |ULTIMATE.start_main_~len~0#1| 2) 1) (div |ULTIMATE.start_main_~len~0#1| 2))) (= |ULTIMATE.start_sll_insert_#in~index#1| |ULTIMATE.start_sll_insert_~index#1|) (= |ULTIMATE.start_sll_create_~head~0#1.base| 0) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (not (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| 0)) (= |ULTIMATE.start_sll_insert_~head#1.offset| |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4) 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select |#length| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 8) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.offset| 0) (< |ULTIMATE.start_sll_insert_~new_node~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_sll_insert_#in~data#1| |ULTIMATE.start_main_~data~0#1|) (= |ULTIMATE.start_sll_insert_~data#1| (select (select |#memory_int| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0)) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_sll_insert_~head#1.base|) (= |#NULL.base| 0))) (<= 1 |ULTIMATE.start_main_~data~0#1|) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| |ULTIMATE.start_sll_insert_~last~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_sll_insert_~data#1|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|))' at error location [2022-11-23 15:34:28,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:34:28,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:34:28,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-11-23 15:34:28,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183698513] [2022-11-23 15:34:28,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:34:28,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 15:34:28,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:28,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 15:34:28,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1583, Unknown=1, NotChecked=80, Total=1806 [2022-11-23 15:34:28,983 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 27 states, 20 states have (on average 1.95) internal successors, (39), 24 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 15:34:30,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:30,105 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2022-11-23 15:34:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 15:34:30,106 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 1.95) internal successors, (39), 24 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 30 [2022-11-23 15:34:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:30,106 INFO L225 Difference]: With dead ends: 90 [2022-11-23 15:34:30,107 INFO L226 Difference]: Without dead ends: 90 [2022-11-23 15:34:30,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=233, Invalid=2422, Unknown=1, NotChecked=100, Total=2756 [2022-11-23 15:34:30,108 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 170 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:30,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 301 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 644 Invalid, 0 Unknown, 59 Unchecked, 0.6s Time] [2022-11-23 15:34:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-23 15:34:30,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 57. [2022-11-23 15:34:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 52 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:34:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2022-11-23 15:34:30,113 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 30 [2022-11-23 15:34:30,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:30,114 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2022-11-23 15:34:30,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 1.95) internal successors, (39), 24 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 15:34:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2022-11-23 15:34:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 15:34:30,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:30,115 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:30,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:34:30,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:34:30,321 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:34:30,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:30,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1504977616, now seen corresponding path program 1 times [2022-11-23 15:34:30,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:30,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171306301] [2022-11-23 15:34:30,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:30,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 15:34:30,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:30,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171306301] [2022-11-23 15:34:30,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171306301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:34:30,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:34:30,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:34:30,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881956531] [2022-11-23 15:34:30,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:34:30,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:34:30,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:30,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:34:30,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:34:30,383 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 15:34:30,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:30,425 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2022-11-23 15:34:30,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:34:30,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-11-23 15:34:30,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:30,427 INFO L225 Difference]: With dead ends: 86 [2022-11-23 15:34:30,427 INFO L226 Difference]: Without dead ends: 86 [2022-11-23 15:34:30,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:34:30,428 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 32 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:30,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 75 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:34:30,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-23 15:34:30,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2022-11-23 15:34:30,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 53 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:34:30,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-11-23 15:34:30,450 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 31 [2022-11-23 15:34:30,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:30,450 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-11-23 15:34:30,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 15:34:30,452 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-11-23 15:34:30,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 15:34:30,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:30,453 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:30,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 15:34:30,454 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:34:30,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:30,455 INFO L85 PathProgramCache]: Analyzing trace with hash -594078547, now seen corresponding path program 1 times [2022-11-23 15:34:30,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:30,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17645821] [2022-11-23 15:34:30,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:30,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 15:34:30,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:30,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17645821] [2022-11-23 15:34:30,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17645821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:34:30,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:34:30,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:34:30,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538333100] [2022-11-23 15:34:30,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:34:30,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:34:30,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:30,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:34:30,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:34:30,640 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:34:30,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:30,684 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-11-23 15:34:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:34:30,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-11-23 15:34:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:30,685 INFO L225 Difference]: With dead ends: 55 [2022-11-23 15:34:30,685 INFO L226 Difference]: Without dead ends: 55 [2022-11-23 15:34:30,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:34:30,686 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 78 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:30,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 59 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:34:30,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-23 15:34:30,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-23 15:34:30,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 50 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:34:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2022-11-23 15:34:30,690 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 32 [2022-11-23 15:34:30,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:30,691 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2022-11-23 15:34:30,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:34:30,691 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2022-11-23 15:34:30,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 15:34:30,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:30,696 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:30,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 15:34:30,697 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:34:30,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:30,697 INFO L85 PathProgramCache]: Analyzing trace with hash -590329171, now seen corresponding path program 1 times [2022-11-23 15:34:30,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:30,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484176443] [2022-11-23 15:34:30,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:30,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 15:34:30,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:30,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484176443] [2022-11-23 15:34:30,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484176443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:34:30,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:34:30,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:34:30,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116464690] [2022-11-23 15:34:30,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:34:30,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:34:30,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:30,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:34:30,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:34:30,817 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 6 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 15:34:30,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:30,920 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2022-11-23 15:34:30,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:34:30,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-11-23 15:34:30,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:30,922 INFO L225 Difference]: With dead ends: 64 [2022-11-23 15:34:30,922 INFO L226 Difference]: Without dead ends: 64 [2022-11-23 15:34:30,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:34:30,923 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:30,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 102 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:34:30,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-23 15:34:30,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-11-23 15:34:30,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 49 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:34:30,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-11-23 15:34:30,927 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 32 [2022-11-23 15:34:30,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:30,928 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-11-23 15:34:30,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 15:34:30,928 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-11-23 15:34:30,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 15:34:30,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:30,929 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:30,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 15:34:30,930 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:34:30,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:30,930 INFO L85 PathProgramCache]: Analyzing trace with hash -590329170, now seen corresponding path program 1 times [2022-11-23 15:34:30,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:30,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166259653] [2022-11-23 15:34:30,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:30,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:30,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 15:34:31,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:31,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166259653] [2022-11-23 15:34:31,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166259653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:34:31,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:34:31,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:34:31,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539703634] [2022-11-23 15:34:31,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:34:31,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:34:31,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:31,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:34:31,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:34:31,048 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:34:31,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:31,088 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-11-23 15:34:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:34:31,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-11-23 15:34:31,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:31,089 INFO L225 Difference]: With dead ends: 53 [2022-11-23 15:34:31,090 INFO L226 Difference]: Without dead ends: 53 [2022-11-23 15:34:31,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:34:31,091 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:31,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 75 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:34:31,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-23 15:34:31,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-23 15:34:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 48 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:34:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-11-23 15:34:31,094 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 32 [2022-11-23 15:34:31,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:31,096 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-11-23 15:34:31,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:34:31,096 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-11-23 15:34:31,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 15:34:31,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:31,101 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:31,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 15:34:31,102 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:34:31,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:31,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1236441505, now seen corresponding path program 1 times [2022-11-23 15:34:31,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:31,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090370763] [2022-11-23 15:34:31,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:31,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 15:34:31,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:31,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090370763] [2022-11-23 15:34:31,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090370763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:34:31,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:34:31,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:34:31,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988020656] [2022-11-23 15:34:31,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:34:31,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:34:31,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:31,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:34:31,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:34:31,226 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 15:34:31,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:31,293 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2022-11-23 15:34:31,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:34:31,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2022-11-23 15:34:31,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:31,294 INFO L225 Difference]: With dead ends: 62 [2022-11-23 15:34:31,294 INFO L226 Difference]: Without dead ends: 62 [2022-11-23 15:34:31,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:34:31,297 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:31,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 62 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:34:31,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-23 15:34:31,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2022-11-23 15:34:31,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 47 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:34:31,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-11-23 15:34:31,300 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 33 [2022-11-23 15:34:31,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:31,300 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-11-23 15:34:31,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 15:34:31,301 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-11-23 15:34:31,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 15:34:31,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:31,303 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:31,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 15:34:31,303 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:34:31,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:31,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1236441504, now seen corresponding path program 1 times [2022-11-23 15:34:31,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:31,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192173200] [2022-11-23 15:34:31,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:31,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:34:31,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:31,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192173200] [2022-11-23 15:34:31,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192173200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:34:31,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071036848] [2022-11-23 15:34:31,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:31,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:31,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:34:31,857 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:34:31,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:34:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:32,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:34:32,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:34:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 15:34:32,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:34:32,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071036848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:34:32,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:34:32,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [16] total 18 [2022-11-23 15:34:32,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268519437] [2022-11-23 15:34:32,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:34:32,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:34:32,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:32,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:34:32,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-11-23 15:34:32,103 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 15:34:32,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:32,156 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-11-23 15:34:32,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:34:32,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2022-11-23 15:34:32,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:32,158 INFO L225 Difference]: With dead ends: 51 [2022-11-23 15:34:32,159 INFO L226 Difference]: Without dead ends: 51 [2022-11-23 15:34:32,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-11-23 15:34:32,162 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:32,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 61 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:34:32,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-23 15:34:32,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-23 15:34:32,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.457142857142857) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:34:32,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-11-23 15:34:32,168 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 33 [2022-11-23 15:34:32,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:32,170 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-11-23 15:34:32,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 15:34:32,170 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-11-23 15:34:32,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 15:34:32,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:32,171 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:32,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:34:32,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 15:34:32,375 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:34:32,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:32,376 INFO L85 PathProgramCache]: Analyzing trace with hash 325019039, now seen corresponding path program 1 times [2022-11-23 15:34:32,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:32,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176446951] [2022-11-23 15:34:32,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:32,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 15:34:32,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:32,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176446951] [2022-11-23 15:34:32,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176446951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:34:32,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:34:32,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:34:32,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904053642] [2022-11-23 15:34:32,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:34:32,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:34:32,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:32,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:34:32,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:34:32,623 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 6 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 15:34:32,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:32,720 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-11-23 15:34:32,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:34:32,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2022-11-23 15:34:32,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:32,721 INFO L225 Difference]: With dead ends: 50 [2022-11-23 15:34:32,721 INFO L226 Difference]: Without dead ends: 50 [2022-11-23 15:34:32,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:34:32,722 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 31 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:32,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 103 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:34:32,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-23 15:34:32,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-23 15:34:32,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 45 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:34:32,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2022-11-23 15:34:32,724 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 34 [2022-11-23 15:34:32,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:32,724 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2022-11-23 15:34:32,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 15:34:32,725 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2022-11-23 15:34:32,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 15:34:32,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:32,725 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:32,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 15:34:32,725 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:34:32,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:32,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1788924678, now seen corresponding path program 1 times [2022-11-23 15:34:32,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:32,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904537014] [2022-11-23 15:34:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:32,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:34:33,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:33,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904537014] [2022-11-23 15:34:33,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904537014] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:34:33,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716015359] [2022-11-23 15:34:33,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:33,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:33,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:34:33,504 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:34:33,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:34:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:33,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-23 15:34:33,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:34:33,813 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 9 treesize of output 5 [2022-11-23 15:34:33,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:33,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 15:34:34,003 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-23 15:34:34,003 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 16 treesize of output 18 [2022-11-23 15:34:34,136 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:34:34,136 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 32 [2022-11-23 15:34:40,230 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 32 DAG size of output: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:34:40,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:40,259 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-23 15:34:40,260 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 2 case distinctions, treesize of input 34 treesize of output 41 [2022-11-23 15:34:40,279 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 7 treesize of output 3 [2022-11-23 15:34:40,337 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 17 treesize of output 9 [2022-11-23 15:34:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:34:40,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:34:40,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716015359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:34:40,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:34:40,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [20] total 30 [2022-11-23 15:34:40,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112671860] [2022-11-23 15:34:40,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:34:40,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 15:34:40,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:40,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 15:34:40,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=836, Unknown=1, NotChecked=0, Total=930 [2022-11-23 15:34:40,370 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:34:46,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:34:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:46,886 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2022-11-23 15:34:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 15:34:46,887 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-11-23 15:34:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:46,887 INFO L225 Difference]: With dead ends: 77 [2022-11-23 15:34:46,887 INFO L226 Difference]: Without dead ends: 77 [2022-11-23 15:34:46,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=142, Invalid=1117, Unknown=1, NotChecked=0, Total=1260 [2022-11-23 15:34:46,889 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 272 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 19 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:46,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 147 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 298 Invalid, 4 Unknown, 0 Unchecked, 2.3s Time] [2022-11-23 15:34:46,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-23 15:34:46,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2022-11-23 15:34:46,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 46 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:34:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-11-23 15:34:46,892 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 37 [2022-11-23 15:34:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:46,892 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-11-23 15:34:46,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 15:34:46,892 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-11-23 15:34:46,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 15:34:46,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:46,893 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:46,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:34:47,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:47,107 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:34:47,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:47,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1788924679, now seen corresponding path program 1 times [2022-11-23 15:34:47,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:47,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410954404] [2022-11-23 15:34:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:47,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:34:48,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:48,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410954404] [2022-11-23 15:34:48,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410954404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:34:48,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955249900] [2022-11-23 15:34:48,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:48,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:48,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:34:48,851 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:34:48,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:34:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:49,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-23 15:34:49,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:34:49,123 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 [2022-11-23 15:34:49,481 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 26 treesize of output 14 [2022-11-23 15:34:49,485 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 5 treesize of output 3 [2022-11-23 15:34:49,489 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 5 treesize of output 3 [2022-11-23 15:34:49,494 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 7 treesize of output 3 [2022-11-23 15:34:49,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:49,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 15:34:49,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:49,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-23 15:34:49,727 INFO L321 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2022-11-23 15:34:49,728 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 18 treesize of output 21 [2022-11-23 15:34:49,749 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-23 15:34:49,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:34:50,157 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:34:50,158 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 47 treesize of output 44 [2022-11-23 15:34:50,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:50,166 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 18 treesize of output 20 [2022-11-23 15:34:50,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:50,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-11-23 15:34:50,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:50,266 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 14 treesize of output 16 [2022-11-23 15:34:50,333 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 26 treesize of output 14 [2022-11-23 15:34:50,338 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 [2022-11-23 15:34:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:34:50,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:34:50,528 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1365 (Array Int Int)) (v_ArrVal_1364 (Array Int Int))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1365) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1364) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_1365 (Array Int Int))) (<= 0 (+ 4 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1365) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2022-11-23 15:34:50,543 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1365 (Array Int Int)) (v_ArrVal_1362 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_ArrVal_1362) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1365) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (forall ((v_ArrVal_1365 (Array Int Int)) (v_ArrVal_1364 (Array Int Int)) (v_ArrVal_1363 (Array Int Int)) (v_ArrVal_1362 (Array Int Int))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_ArrVal_1362) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1365) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_ArrVal_1363) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1364) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2022-11-23 15:34:50,607 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1365 (Array Int Int)) (v_ArrVal_1364 (Array Int Int)) (v_ArrVal_1363 (Array Int Int)) (v_ArrVal_1362 (Array Int Int))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~last~0#1.base| v_ArrVal_1362) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1365) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~last~0#1.base| v_ArrVal_1363) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1364) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_1365 (Array Int Int)) (v_ArrVal_1362 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~last~0#1.base| v_ArrVal_1362) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1365) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4)))) is different from false [2022-11-23 15:34:50,620 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|))) (and (forall ((v_ArrVal_1365 (Array Int Int)) (v_ArrVal_1364 (Array Int Int)) (v_ArrVal_1363 (Array Int Int)) (v_ArrVal_1362 (Array Int Int))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1362) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1365) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1363) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1364) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_1365 (Array Int Int)) (v_ArrVal_1362 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1362) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1365) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))))) is different from false [2022-11-23 15:34:50,633 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|))) (and (forall ((v_ArrVal_1365 (Array Int Int)) (v_ArrVal_1362 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1362) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_1365) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (forall ((v_ArrVal_1365 (Array Int Int)) (v_ArrVal_1364 (Array Int Int)) (v_ArrVal_1363 (Array Int Int)) (v_ArrVal_1362 (Array Int Int))) (<= (+ 8 (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1362) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_1365) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1363) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_1364) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2022-11-23 15:34:50,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955249900] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:34:50,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [710356656] [2022-11-23 15:34:50,960 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-23 15:34:50,960 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:34:50,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:34:50,961 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:34:50,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:34:50,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:50,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:50,992 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 [2022-11-23 15:34:51,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:51,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:51,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:34:51,037 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 [2022-11-23 15:34:51,041 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 [2022-11-23 15:34:51,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:34:51,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:34:51,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:34:51,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:51,064 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 25 treesize of output 13 [2022-11-23 15:34:51,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:34:51,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:51,075 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 25 treesize of output 13 [2022-11-23 15:34:51,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:51,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:51,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:34:51,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:51,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:51,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:34:51,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:51,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:51,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:34:51,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:51,209 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 [2022-11-23 15:34:51,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:51,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 15:34:51,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:51,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 15:34:51,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:51,265 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:34:51,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:34:51,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:34:51,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:51,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:34:51,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:51,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:34:51,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:51,363 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:34:51,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:34:51,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:34:51,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:51,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:34:51,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:34:51,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:51,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:51,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 218 [2022-11-23 15:34:51,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:51,551 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 220 [2022-11-23 15:34:51,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:51,565 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 224 [2022-11-23 15:34:51,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:51,625 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:34:51,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:34:51,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:51,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:34:51,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:34:51,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:34:51,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:51,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:51,737 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:34:51,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:34:51,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:51,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:34:51,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:34:51,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:34:51,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:34:51,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:51,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 218 [2022-11-23 15:34:51,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:51,924 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 220 [2022-11-23 15:34:51,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:51,949 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 224 [2022-11-23 15:34:52,118 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 7 treesize of output 3 [2022-11-23 15:34:52,130 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 7 treesize of output 3 [2022-11-23 15:34:52,213 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 7 treesize of output 3 [2022-11-23 15:34:52,223 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 7 treesize of output 3 [2022-11-23 15:34:52,504 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 [2022-11-23 15:34:52,516 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 [2022-11-23 15:34:52,528 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 [2022-11-23 15:34:52,597 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:34:52,597 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-23 15:34:52,636 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:34:52,636 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-23 15:34:52,659 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 [2022-11-23 15:34:52,970 INFO L321 Elim1Store]: treesize reduction 62, result has 24.4 percent of original size [2022-11-23 15:34:52,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 248 treesize of output 254 [2022-11-23 15:34:53,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:53,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 15:34:53,073 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 11 for LOIs [2022-11-23 15:34:53,078 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 [2022-11-23 15:34:53,082 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 [2022-11-23 15:34:53,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:34:53,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:34:53,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:34:53,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:53,113 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 25 treesize of output 13 [2022-11-23 15:34:53,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:53,138 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 25 treesize of output 13 [2022-11-23 15:34:53,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:34:53,148 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:35:01,636 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3456#(and (or (not (<= (+ |ULTIMATE.start_main_~ptr~0#1.offset| 8) (select |#length| |ULTIMATE.start_main_~ptr~0#1.base|))) (not (<= 0 (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)))) (or (and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.base|) (<= 0 |ULTIMATE.start_sll_insert_~new_node~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_insert_~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_insert_~head#1.base|) (<= 0 (+ |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4)) (<= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~head~0#1.base| 0) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 1 |ULTIMATE.start_sll_insert_#in~data#1|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~count~0#1| 0) (<= |ULTIMATE.start_sll_insert_~index#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= |ULTIMATE.start_sll_insert_~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~data#1| 1) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= 0 |ULTIMATE.start_sll_insert_~head#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_sll_insert_~data#1|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|)) (and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_sll_insert_~new_node~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_insert_~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~new_head~0#1.offset|) (<= 0 |ULTIMATE.start_sll_insert_~head#1.base|) (<= 0 (+ |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4)) (<= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.offset|) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 1 |ULTIMATE.start_sll_insert_#in~data#1|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~count~0#1| 0) (<= |ULTIMATE.start_sll_insert_~index#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= |ULTIMATE.start_sll_insert_~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~data#1| 1) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= 0 |ULTIMATE.start_sll_insert_~head#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_sll_insert_~data#1|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|))))' at error location [2022-11-23 15:35:01,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:35:01,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:35:01,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2022-11-23 15:35:01,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321320285] [2022-11-23 15:35:01,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:35:01,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-23 15:35:01,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:35:01,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-23 15:35:01,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=3305, Unknown=5, NotChecked=600, Total=4160 [2022-11-23 15:35:01,639 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 37 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 32 states have internal predecessors, (53), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 15:35:04,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:35:04,243 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2022-11-23 15:35:04,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 15:35:04,244 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 32 states have internal predecessors, (53), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2022-11-23 15:35:04,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:35:04,245 INFO L225 Difference]: With dead ends: 114 [2022-11-23 15:35:04,245 INFO L226 Difference]: Without dead ends: 114 [2022-11-23 15:35:04,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=454, Invalid=5261, Unknown=5, NotChecked=760, Total=6480 [2022-11-23 15:35:04,247 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 705 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:35:04,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 309 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:35:04,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-23 15:35:04,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 56. [2022-11-23 15:35:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 51 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:35:04,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2022-11-23 15:35:04,251 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 37 [2022-11-23 15:35:04,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:35:04,251 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2022-11-23 15:35:04,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 32 states have internal predecessors, (53), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 15:35:04,252 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2022-11-23 15:35:04,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 15:35:04,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:35:04,253 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:35:04,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-23 15:35:04,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:35:04,459 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:35:04,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:35:04,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1936688039, now seen corresponding path program 1 times [2022-11-23 15:35:04,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:35:04,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107838198] [2022-11-23 15:35:04,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:35:04,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:35:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:35:04,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:35:04,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107838198] [2022-11-23 15:35:04,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107838198] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:35:04,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47217227] [2022-11-23 15:35:04,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:35:04,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:35:04,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:35:04,920 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:35:04,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:35:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:05,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 15:35:05,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:35:05,140 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 14 [2022-11-23 15:35:05,177 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1514 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_1514))) (not (= |node_create_~temp~0#1.base| 0)))) is different from true [2022-11-23 15:35:05,203 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 14 [2022-11-23 15:35:05,220 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1515 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_1515))) (not (= |node_create_~temp~0#1.base| 0)))) is different from true [2022-11-23 15:35:05,238 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 14 [2022-11-23 15:35:05,254 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1516 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_1516))) (not (= |node_create_~temp~0#1.base| 0)))) is different from true [2022-11-23 15:35:05,275 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 14 [2022-11-23 15:35:05,282 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 7 treesize of output 3 [2022-11-23 15:35:05,313 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:35:05,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-23 15:35:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 12 not checked. [2022-11-23 15:35:05,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:35:05,841 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 15:35:05,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47217227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:35:05,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1455729119] [2022-11-23 15:35:05,844 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-23 15:35:05,844 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:35:05,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:35:05,844 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:35:05,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:35:05,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:05,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:05,867 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 [2022-11-23 15:35:05,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:05,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:05,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:35:05,905 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 [2022-11-23 15:35:05,909 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 [2022-11-23 15:35:05,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:35:05,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:35:05,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:35:05,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:05,935 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 25 treesize of output 13 [2022-11-23 15:35:05,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:35:05,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:05,947 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 25 treesize of output 13 [2022-11-23 15:35:05,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:05,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:05,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:35:05,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:05,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:05,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:35:06,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:06,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:06,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:35:06,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:35:06,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 15:35:06,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:06,067 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 [2022-11-23 15:35:06,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:35:06,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 15:35:06,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:06,108 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:35:06,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:35:06,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:35:06,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:35:06,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:35:06,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:35:06,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:35:06,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:06,198 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:35:06,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:35:06,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:35:06,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:35:06,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:35:06,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:35:06,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:35:06,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:06,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 218 [2022-11-23 15:35:06,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:35:06,396 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 220 [2022-11-23 15:35:06,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:35:06,411 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 224 [2022-11-23 15:35:06,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:06,479 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:35:06,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:35:06,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:35:06,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:35:06,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:35:06,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:35:06,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:35:06,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:06,573 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:35:06,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:35:06,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:35:06,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:35:06,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:35:06,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:35:06,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:35:06,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:06,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 218 [2022-11-23 15:35:06,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:35:06,743 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 220 [2022-11-23 15:35:06,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:35:06,756 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 230 [2022-11-23 15:35:06,921 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 7 treesize of output 3 [2022-11-23 15:35:06,933 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 7 treesize of output 3 [2022-11-23 15:35:07,017 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 7 treesize of output 3 [2022-11-23 15:35:07,027 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 7 treesize of output 3 [2022-11-23 15:35:07,236 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 [2022-11-23 15:35:07,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:35:07,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:35:07,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:07,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 15:35:07,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:07,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 15:35:07,306 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 [2022-11-23 15:35:07,460 INFO L321 Elim1Store]: treesize reduction 62, result has 24.4 percent of original size [2022-11-23 15:35:07,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 248 treesize of output 254 [2022-11-23 15:35:07,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:07,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 15:35:07,558 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 11 for LOIs [2022-11-23 15:35:07,563 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 [2022-11-23 15:35:07,567 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 [2022-11-23 15:35:07,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:35:07,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:35:07,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:35:07,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:07,611 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 25 treesize of output 13 [2022-11-23 15:35:07,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:07,618 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 25 treesize of output 13 [2022-11-23 15:35:07,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:35:07,625 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:35:13,814 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3921#(and (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~head#1.base|) |ULTIMATE.start_sll_insert_~head#1.offset|)) (= 1 (select |#valid| |ULTIMATE.start_sll_insert_~new_node~0#1.base|)) (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) (+ |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 4)) |ULTIMATE.start_sll_insert_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (= |ULTIMATE.start_main_~ptr~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~ptr~0#1.offset|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~head#1.offset| 0) (or (not (<= (+ |ULTIMATE.start_main_~ptr~0#1.offset| 8) (select |#length| |ULTIMATE.start_main_~ptr~0#1.base|))) (not (<= 0 (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)))) (<= (+ |ULTIMATE.start_sll_insert_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_insert_~head#1.base|)) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (<= |ULTIMATE.start_sll_insert_~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_insert_~head#1.base|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= |ULTIMATE.start_main_~count~0#1| 0) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= (+ |ULTIMATE.start_main_~#s~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#s~0#1.base|)) (<= 1 |ULTIMATE.start_sll_insert_#in~data#1|) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~head#1.base|) |ULTIMATE.start_sll_insert_~head#1.offset|) |ULTIMATE.start_sll_insert_~new_node~0#1.base|) (= (select |#valid| |ULTIMATE.start_sll_insert_~head#1.base|) 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= (+ |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 8) (select |#length| |ULTIMATE.start_sll_insert_~new_node~0#1.base|)) (<= |ULTIMATE.start_sll_insert_~index#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= |ULTIMATE.start_sll_insert_~data#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_sll_insert_#in~data#1| 1) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) (+ |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 4)) |ULTIMATE.start_sll_insert_~last~0#1.base|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |ULTIMATE.start_sll_insert_~head#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_sll_insert_~data#1|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-23 15:35:13,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:35:13,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:35:13,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 6] total 27 [2022-11-23 15:35:13,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554485716] [2022-11-23 15:35:13,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:35:13,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 15:35:13,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:35:13,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 15:35:13,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1733, Unknown=3, NotChecked=258, Total=2162 [2022-11-23 15:35:13,817 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 27 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 4 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 15:35:14,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:35:14,624 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-11-23 15:35:14,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 15:35:14,625 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 4 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 37 [2022-11-23 15:35:14,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:35:14,625 INFO L225 Difference]: With dead ends: 51 [2022-11-23 15:35:14,625 INFO L226 Difference]: Without dead ends: 51 [2022-11-23 15:35:14,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=357, Invalid=3074, Unknown=3, NotChecked=348, Total=3782 [2022-11-23 15:35:14,627 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 161 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:35:14,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 206 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 475 Invalid, 0 Unknown, 144 Unchecked, 0.3s Time] [2022-11-23 15:35:14,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-23 15:35:14,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-23 15:35:14,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:35:14,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-11-23 15:35:14,630 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 37 [2022-11-23 15:35:14,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:35:14,630 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-11-23 15:35:14,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 4 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 15:35:14,630 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-11-23 15:35:14,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 15:35:14,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:35:14,631 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:35:14,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:35:14,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:35:14,831 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:35:14,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:35:14,832 INFO L85 PathProgramCache]: Analyzing trace with hash -377819836, now seen corresponding path program 1 times [2022-11-23 15:35:14,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:35:14,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318270449] [2022-11-23 15:35:14,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:35:14,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:35:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:35:15,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:35:15,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318270449] [2022-11-23 15:35:15,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318270449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:35:15,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815152806] [2022-11-23 15:35:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:35:15,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:35:15,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:35:15,913 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:35:15,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:35:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:16,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-23 15:35:16,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:35:16,434 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 16 treesize of output 8 [2022-11-23 15:35:16,504 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1662 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1662)))) is different from true [2022-11-23 15:35:16,510 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1663 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_#res#1.base| v_ArrVal_1663))) (< |c_node_create_#res#1.base| |c_#StackHeapBarrier|)) is different from true [2022-11-23 15:35:16,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:16,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 15:35:16,806 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:35:16,806 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-23 15:35:16,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:16,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 15:35:16,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-23 15:35:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2022-11-23 15:35:16,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:35:16,925 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1665 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1665) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0))) is different from false [2022-11-23 15:35:18,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815152806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:35:18,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [147360050] [2022-11-23 15:35:18,190 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-23 15:35:18,190 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:35:18,190 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:35:18,191 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:35:18,191 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:35:18,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:18,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:18,211 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 [2022-11-23 15:35:18,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:18,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:18,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:35:18,248 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 [2022-11-23 15:35:18,251 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 [2022-11-23 15:35:18,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:35:18,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:35:18,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:35:18,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:18,276 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 25 treesize of output 13 [2022-11-23 15:35:18,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:35:18,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:18,287 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 25 treesize of output 13 [2022-11-23 15:35:18,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:18,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:18,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:35:18,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:18,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:18,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:35:18,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:18,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:18,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:35:18,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:35:18,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:18,439 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 209 [2022-11-23 15:35:18,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:35:18,454 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 209 [2022-11-23 15:35:18,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:35:18,469 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 109 [2022-11-23 15:35:18,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:18,515 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:35:18,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:35:18,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:35:18,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:35:18,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:35:18,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:35:18,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:35:18,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:18,610 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:35:18,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:35:18,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:35:18,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:35:18,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:35:18,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:35:18,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:35:18,725 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 [2022-11-23 15:35:18,733 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 [2022-11-23 15:35:18,746 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 [2022-11-23 15:35:18,827 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 5 treesize of output 3 [2022-11-23 15:35:18,835 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 7 treesize of output 5 [2022-11-23 15:35:18,845 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 76 treesize of output 58 [2022-11-23 15:35:18,853 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 51 treesize of output 45 [2022-11-23 15:35:18,939 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 76 treesize of output 58 [2022-11-23 15:35:18,947 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 51 treesize of output 45 [2022-11-23 15:35:18,968 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 7 treesize of output 5 [2022-11-23 15:35:18,979 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 5 treesize of output 3 [2022-11-23 15:35:19,017 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 [2022-11-23 15:35:19,027 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 [2022-11-23 15:35:19,036 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 [2022-11-23 15:35:19,180 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 7 treesize of output 3 [2022-11-23 15:35:19,196 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 7 treesize of output 3 [2022-11-23 15:35:19,271 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 7 treesize of output 3 [2022-11-23 15:35:19,281 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 7 treesize of output 3 [2022-11-23 15:35:19,759 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 [2022-11-23 15:35:19,865 INFO L321 Elim1Store]: treesize reduction 36, result has 57.6 percent of original size [2022-11-23 15:35:19,866 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 263 treesize of output 297 [2022-11-23 15:35:19,970 INFO L321 Elim1Store]: treesize reduction 36, result has 57.6 percent of original size [2022-11-23 15:35:19,970 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 253 treesize of output 287 [2022-11-23 15:35:23,915 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 [2022-11-23 15:35:23,925 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 [2022-11-23 15:35:23,961 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 [2022-11-23 15:35:24,121 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 20 for LOIs [2022-11-23 15:35:24,128 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 [2022-11-23 15:35:24,134 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 [2022-11-23 15:35:24,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:35:24,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:35:24,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:35:24,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:35:24,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:24,179 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 25 treesize of output 13 [2022-11-23 15:35:24,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:24,192 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 25 treesize of output 13 [2022-11-23 15:35:24,196 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:35:30,356 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4268#(and (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= 2 |ULTIMATE.start_main_~len~0#1|) (= 1 (select |#valid| |ULTIMATE.start_sll_insert_~new_node~0#1.base|)) (<= 0 |ULTIMATE.start_sll_insert_~new_node~0#1.offset|) (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) (+ |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 4)) |ULTIMATE.start_sll_insert_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (= |ULTIMATE.start_main_~ptr~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~ptr~0#1.offset|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_insert_~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_insert_~head#1.base|) (<= 0 (+ |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4)) (<= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= |ULTIMATE.start_main_~ptr~0#1.offset| 0) (= |ULTIMATE.start_main_~count~0#1| 0) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.base|) (= |ULTIMATE.start_main_~ptr~0#1.base| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= (+ |ULTIMATE.start_main_~#s~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#s~0#1.base|)) (<= 1 |ULTIMATE.start_sll_insert_#in~data#1|) (<= 0 (+ |ULTIMATE.start_sll_insert_~index#1| 1)) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |#NULL.base| 0) (<= (+ |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 8) (select |#length| |ULTIMATE.start_sll_insert_~new_node~0#1.base|)) (<= |ULTIMATE.start_sll_insert_~index#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= |ULTIMATE.start_sll_insert_~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~data#1| 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) (+ |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 4)) |ULTIMATE.start_sll_insert_~last~0#1.base|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= 0 |ULTIMATE.start_sll_insert_~head#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_sll_insert_~data#1|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|))' at error location [2022-11-23 15:35:30,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:35:30,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:35:30,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2022-11-23 15:35:30,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681761199] [2022-11-23 15:35:30,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:35:30,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-23 15:35:30,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:35:30,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-23 15:35:30,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=3286, Unknown=59, NotChecked=354, Total=3906 [2022-11-23 15:35:30,359 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 38 states, 32 states have (on average 1.71875) internal successors, (55), 32 states have internal predecessors, (55), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 15:35:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:35:32,519 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2022-11-23 15:35:32,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 15:35:32,519 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 1.71875) internal successors, (55), 32 states have internal predecessors, (55), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2022-11-23 15:35:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:35:32,520 INFO L225 Difference]: With dead ends: 54 [2022-11-23 15:35:32,520 INFO L226 Difference]: Without dead ends: 54 [2022-11-23 15:35:32,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=447, Invalid=5051, Unknown=64, NotChecked=444, Total=6006 [2022-11-23 15:35:32,524 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 414 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:35:32,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 334 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 614 Invalid, 0 Unknown, 94 Unchecked, 0.5s Time] [2022-11-23 15:35:32,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-23 15:35:32,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2022-11-23 15:35:32,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 46 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:35:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2022-11-23 15:35:32,529 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 38 [2022-11-23 15:35:32,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:35:32,529 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2022-11-23 15:35:32,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 1.71875) internal successors, (55), 32 states have internal predecessors, (55), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 15:35:32,530 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2022-11-23 15:35:32,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 15:35:32,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:35:32,530 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:35:32,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:35:32,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:35:32,737 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:35:32,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:35:32,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1903426815, now seen corresponding path program 1 times [2022-11-23 15:35:32,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:35:32,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065940039] [2022-11-23 15:35:32,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:35:32,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:35:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:35:35,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:35:35,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065940039] [2022-11-23 15:35:35,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065940039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:35:35,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760590628] [2022-11-23 15:35:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:35:35,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:35:35,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:35:35,150 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:35:35,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:35:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:35,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-23 15:35:35,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:35:35,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:35:35,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:35,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 15:35:35,906 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 [2022-11-23 15:35:35,910 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 7 treesize of output 3 [2022-11-23 15:35:35,915 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 7 treesize of output 3 [2022-11-23 15:35:35,919 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 5 treesize of output 3 [2022-11-23 15:35:35,984 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 [2022-11-23 15:35:36,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:36,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-23 15:35:36,294 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-23 15:35:36,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:35:36,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-23 15:35:36,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:36,312 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 14 treesize of output 16 [2022-11-23 15:35:36,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:36,888 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 62 [2022-11-23 15:35:36,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:36,896 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 36 treesize of output 27 [2022-11-23 15:35:36,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:36,903 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 33 treesize of output 28 [2022-11-23 15:35:37,091 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-23 15:35:37,091 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 92 [2022-11-23 15:35:37,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:37,103 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 24 treesize of output 26 [2022-11-23 15:35:37,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 15:35:37,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:37,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:35:37,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 33 [2022-11-23 15:35:37,283 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 [2022-11-23 15:35:37,410 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 13 treesize of output 9 [2022-11-23 15:35:37,488 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 [2022-11-23 15:35:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:35:37,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:35:39,489 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 209 treesize of output 170 [2022-11-23 15:35:40,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760590628] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:35:40,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1238863795] [2022-11-23 15:35:40,325 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-23 15:35:40,325 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:35:40,326 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:35:40,326 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:35:40,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:35:40,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:40,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:40,351 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 [2022-11-23 15:35:40,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:40,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:40,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:35:40,395 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 [2022-11-23 15:35:40,399 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 [2022-11-23 15:35:40,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:35:40,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:35:40,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:35:40,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:35:40,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:40,426 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 25 treesize of output 13 [2022-11-23 15:35:40,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:40,433 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 25 treesize of output 13 [2022-11-23 15:35:40,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:40,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:40,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:35:40,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:40,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:40,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:35:40,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:40,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:40,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:35:40,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-23 15:35:40,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-23 15:35:40,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:40,559 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 [2022-11-23 15:35:40,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:40,591 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:35:40,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:35:40,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:35:40,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:35:40,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:35:40,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:35:40,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:35:40,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:40,679 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:35:40,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:35:40,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:35:40,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:35:40,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:35:40,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:35:40,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:35:40,799 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 [2022-11-23 15:35:40,808 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 [2022-11-23 15:35:40,821 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 [2022-11-23 15:35:40,900 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 7 treesize of output 5 [2022-11-23 15:35:40,913 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 76 treesize of output 58 [2022-11-23 15:35:40,922 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 51 treesize of output 45 [2022-11-23 15:35:40,948 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 5 treesize of output 3 [2022-11-23 15:35:41,029 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 57 treesize of output 51 [2022-11-23 15:35:41,037 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 70 treesize of output 52 [2022-11-23 15:35:41,056 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 5 treesize of output 3 [2022-11-23 15:35:41,067 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 7 treesize of output 5 [2022-11-23 15:35:41,132 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 [2022-11-23 15:35:41,140 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 [2022-11-23 15:35:41,155 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 [2022-11-23 15:35:41,286 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 7 treesize of output 3 [2022-11-23 15:35:41,309 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 7 treesize of output 3 [2022-11-23 15:35:41,381 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 7 treesize of output 3 [2022-11-23 15:35:41,397 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 7 treesize of output 3 [2022-11-23 15:35:41,938 INFO L321 Elim1Store]: treesize reduction 36, result has 57.6 percent of original size [2022-11-23 15:35:41,939 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 263 treesize of output 297 [2022-11-23 15:35:42,021 INFO L321 Elim1Store]: treesize reduction 36, result has 57.6 percent of original size [2022-11-23 15:35:42,021 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 253 treesize of output 287 [2022-11-23 15:35:44,340 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 [2022-11-23 15:35:44,523 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 [2022-11-23 15:35:44,533 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 [2022-11-23 15:35:44,542 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 [2022-11-23 15:35:44,777 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 20 for LOIs [2022-11-23 15:35:44,787 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 [2022-11-23 15:35:44,791 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 [2022-11-23 15:35:44,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:35:44,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:35:44,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:35:44,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:35:44,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:44,835 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 25 treesize of output 13 [2022-11-23 15:35:44,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:44,846 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 25 treesize of output 13 [2022-11-23 15:35:44,848 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:35:54,371 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4637#(and (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= 2 |ULTIMATE.start_main_~len~0#1|) (= 1 (select |#valid| |ULTIMATE.start_sll_insert_~new_node~0#1.base|)) (= (select |#valid| |ULTIMATE.start_main_~ptr~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~ptr~0#1.offset| 8) (select |#length| |ULTIMATE.start_main_~ptr~0#1.base|)) (<= 0 |ULTIMATE.start_sll_insert_~new_node~0#1.offset|) (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) (+ |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 4)) |ULTIMATE.start_sll_insert_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (= |ULTIMATE.start_main_~ptr~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~ptr~0#1.offset|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~head#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (<= |ULTIMATE.start_sll_insert_~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~temp~2#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4))) (<= 0 |ULTIMATE.start_sll_insert_~head#1.base|) (<= 0 (+ |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4)) (<= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= |ULTIMATE.start_main_~count~0#1| 0) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= (+ |ULTIMATE.start_main_~#s~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#s~0#1.base|)) (<= 1 |ULTIMATE.start_sll_insert_#in~data#1|) (not (= |ULTIMATE.start_main_~data~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) |ULTIMATE.start_main_~ptr~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_sll_insert_~index#1| 1)) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |#NULL.base| 0) (<= (+ |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 8) (select |#length| |ULTIMATE.start_sll_insert_~new_node~0#1.base|)) (<= |ULTIMATE.start_sll_insert_~index#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= |ULTIMATE.start_sll_insert_~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~data#1| 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) (+ |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 4)) |ULTIMATE.start_sll_insert_~last~0#1.base|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) |ULTIMATE.start_main_~temp~2#1.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= 0 |ULTIMATE.start_sll_insert_~head#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_sll_insert_~data#1|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= 0 |ULTIMATE.start_main_~ptr~0#1.offset|))' at error location [2022-11-23 15:35:54,371 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:35:54,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:35:54,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 44 [2022-11-23 15:35:54,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529574356] [2022-11-23 15:35:54,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:35:54,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-23 15:35:54,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:35:54,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-23 15:35:54,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=5251, Unknown=26, NotChecked=0, Total=5550 [2022-11-23 15:35:54,374 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 44 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 15:35:59,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:35:59,472 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-11-23 15:35:59,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 15:35:59,476 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-11-23 15:35:59,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:35:59,476 INFO L225 Difference]: With dead ends: 62 [2022-11-23 15:35:59,476 INFO L226 Difference]: Without dead ends: 62 [2022-11-23 15:35:59,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=534, Invalid=7994, Unknown=28, NotChecked=0, Total=8556 [2022-11-23 15:35:59,479 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 431 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 31 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:35:59,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 267 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1238 Invalid, 3 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 15:35:59,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-23 15:35:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2022-11-23 15:35:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 47 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:35:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-11-23 15:35:59,482 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 40 [2022-11-23 15:35:59,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:35:59,482 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-11-23 15:35:59,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 15:35:59,483 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-11-23 15:35:59,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 15:35:59,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:35:59,483 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:35:59,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:35:59,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:35:59,690 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:35:59,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:35:59,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1123310398, now seen corresponding path program 1 times [2022-11-23 15:35:59,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:35:59,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456808270] [2022-11-23 15:35:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:35:59,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:35:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:36:02,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:02,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456808270] [2022-11-23 15:36:02,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456808270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:36:02,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566642074] [2022-11-23 15:36:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:02,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:02,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:36:02,135 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:36:02,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 15:36:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:02,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-23 15:36:02,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:36:02,806 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 19 treesize of output 11 [2022-11-23 15:36:02,811 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 7 treesize of output 3 [2022-11-23 15:36:02,815 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 5 treesize of output 3 [2022-11-23 15:36:02,876 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 [2022-11-23 15:36:03,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:03,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 15:36:03,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:03,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:36:03,202 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-23 15:36:03,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-23 15:36:03,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:03,765 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 55 [2022-11-23 15:36:03,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:03,776 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-11-23 15:36:03,910 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-23 15:36:03,910 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 113 [2022-11-23 15:36:03,927 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:36:03,927 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 107 treesize of output 102 [2022-11-23 15:36:04,045 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 94 treesize of output 70 [2022-11-23 15:36:04,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:04,216 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:36:04,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 43 [2022-11-23 15:36:04,222 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 13 treesize of output 9 [2022-11-23 15:36:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:36:04,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:36:05,713 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 244 treesize of output 198 [2022-11-23 15:36:07,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566642074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:36:07,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [351803634] [2022-11-23 15:36:07,208 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-23 15:36:07,209 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:36:07,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:36:07,209 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:36:07,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:36:07,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:07,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:07,237 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 [2022-11-23 15:36:07,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:07,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:07,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:36:07,277 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 [2022-11-23 15:36:07,281 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 [2022-11-23 15:36:07,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:36:07,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:36:07,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:36:07,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:36:07,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:07,311 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 25 treesize of output 13 [2022-11-23 15:36:07,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:07,317 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 25 treesize of output 13 [2022-11-23 15:36:07,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:07,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:07,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:36:07,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:07,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:07,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:36:07,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:07,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:07,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:36:07,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:07,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 15:36:07,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:07,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 15:36:07,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:07,444 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 [2022-11-23 15:36:07,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:07,477 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:36:07,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:36:07,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:36:07,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:36:07,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:36:07,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:36:07,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:36:07,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:07,573 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:36:07,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:36:07,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:36:07,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:36:07,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:36:07,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:36:07,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:36:07,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:07,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 218 [2022-11-23 15:36:07,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:07,753 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 220 [2022-11-23 15:36:07,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:07,768 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 230 [2022-11-23 15:36:07,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:07,832 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:36:07,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:36:07,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:36:07,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:36:07,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:36:07,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:36:07,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:36:07,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:07,926 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:36:07,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:36:07,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:36:07,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:36:07,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:36:07,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:36:07,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:36:08,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:08,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 218 [2022-11-23 15:36:08,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:08,086 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 220 [2022-11-23 15:36:08,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:08,102 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 224 [2022-11-23 15:36:08,250 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 7 treesize of output 3 [2022-11-23 15:36:08,261 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 7 treesize of output 3 [2022-11-23 15:36:08,333 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 7 treesize of output 3 [2022-11-23 15:36:08,357 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 7 treesize of output 3 [2022-11-23 15:36:08,592 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 [2022-11-23 15:36:08,600 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 [2022-11-23 15:36:08,611 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 [2022-11-23 15:36:08,650 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:36:08,651 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-23 15:36:08,684 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:36:08,684 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-23 15:36:08,698 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 [2022-11-23 15:36:08,997 INFO L321 Elim1Store]: treesize reduction 62, result has 24.4 percent of original size [2022-11-23 15:36:08,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 248 treesize of output 254 [2022-11-23 15:36:09,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:09,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 15:36:09,091 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 11 for LOIs [2022-11-23 15:36:09,097 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 [2022-11-23 15:36:09,101 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 [2022-11-23 15:36:09,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:36:09,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:36:09,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:36:09,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:36:09,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:09,142 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 25 treesize of output 13 [2022-11-23 15:36:09,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:09,162 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 25 treesize of output 13 [2022-11-23 15:36:09,164 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:36:16,575 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5035#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_sll_insert_~new_node~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~head#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (<= |ULTIMATE.start_sll_insert_~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_insert_~head#1.base|) (<= 0 (+ |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4)) (<= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~ptr~0#1.base|) 1)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.offset|) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 1 |ULTIMATE.start_sll_insert_#in~data#1|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_sll_insert_~index#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= |ULTIMATE.start_sll_insert_~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~data#1| 1) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= 0 |ULTIMATE.start_sll_insert_~head#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_sll_insert_~data#1|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|))' at error location [2022-11-23 15:36:16,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:36:16,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:36:16,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 48 [2022-11-23 15:36:16,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174498801] [2022-11-23 15:36:16,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:36:16,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 15:36:16,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:16,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 15:36:16,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=6044, Unknown=14, NotChecked=0, Total=6320 [2022-11-23 15:36:16,578 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 49 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 42 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 15:36:21,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:21,951 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2022-11-23 15:36:21,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 15:36:21,951 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 42 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2022-11-23 15:36:21,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:21,952 INFO L225 Difference]: With dead ends: 81 [2022-11-23 15:36:21,952 INFO L226 Difference]: Without dead ends: 81 [2022-11-23 15:36:21,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=676, Invalid=9208, Unknown=16, NotChecked=0, Total=9900 [2022-11-23 15:36:21,954 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 807 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 40 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:21,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 281 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1282 Invalid, 3 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 15:36:21,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-23 15:36:21,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2022-11-23 15:36:21,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.375) internal successors, (55), 49 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:36:21,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-11-23 15:36:21,957 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 41 [2022-11-23 15:36:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:21,957 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-11-23 15:36:21,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 42 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 15:36:21,957 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-11-23 15:36:21,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 15:36:21,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:21,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:21,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 15:36:22,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-23 15:36:22,159 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:36:22,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:22,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1123310397, now seen corresponding path program 1 times [2022-11-23 15:36:22,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:22,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422502766] [2022-11-23 15:36:22,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:22,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:36:25,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:25,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422502766] [2022-11-23 15:36:25,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422502766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:36:25,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104912274] [2022-11-23 15:36:25,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:25,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:25,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:36:25,190 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:36:25,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 15:36:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:25,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-23 15:36:25,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:36:25,449 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 [2022-11-23 15:36:25,456 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 [2022-11-23 15:36:25,528 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 5 treesize of output 3 [2022-11-23 15:36:25,531 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 5 treesize of output 3 [2022-11-23 15:36:25,540 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_2139 Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_2139) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-11-23 15:36:25,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:25,566 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 14 [2022-11-23 15:36:25,575 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:36:25,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-23 15:36:25,649 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 5 treesize of output 3 [2022-11-23 15:36:25,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:25,832 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 14 [2022-11-23 15:36:26,207 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 17 treesize of output 9 [2022-11-23 15:36:26,219 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 5 treesize of output 3 [2022-11-23 15:36:26,224 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 7 treesize of output 3 [2022-11-23 15:36:26,228 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 5 treesize of output 3 [2022-11-23 15:36:26,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:26,473 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 14 treesize of output 9 [2022-11-23 15:36:26,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:26,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 15:36:26,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:26,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:36:26,508 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-23 15:36:26,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:36:27,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:27,044 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 61 [2022-11-23 15:36:27,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:27,053 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-23 15:36:27,198 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-23 15:36:27,198 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 121 [2022-11-23 15:36:27,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:27,222 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-11-23 15:36:27,222 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 2 case distinctions, treesize of input 120 treesize of output 116 [2022-11-23 15:36:27,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:27,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:27,550 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:36:27,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 139 treesize of output 69 [2022-11-23 15:36:27,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:27,564 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 15:36:27,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 28 [2022-11-23 15:36:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-23 15:36:27,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:36:32,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104912274] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:36:32,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [763508295] [2022-11-23 15:36:32,769 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-23 15:36:32,770 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:36:32,770 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:36:32,770 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:36:32,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:36:32,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:32,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:32,795 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 [2022-11-23 15:36:32,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:32,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:32,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:36:32,841 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 [2022-11-23 15:36:32,846 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 [2022-11-23 15:36:32,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:36:32,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:36:32,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:36:32,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:32,875 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 25 treesize of output 13 [2022-11-23 15:36:32,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:36:32,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:32,889 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 25 treesize of output 13 [2022-11-23 15:36:32,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:32,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:32,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:36:32,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:32,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:32,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:36:32,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:32,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:32,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:36:33,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:33,013 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 [2022-11-23 15:36:33,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:33,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 15:36:33,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:33,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 15:36:33,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:33,082 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:36:33,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:36:33,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:36:33,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:36:33,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:36:33,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:36:33,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:36:33,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:33,183 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:36:33,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:36:33,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:36:33,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:36:33,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:36:33,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:36:33,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:36:33,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:33,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 218 [2022-11-23 15:36:33,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:33,366 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 220 [2022-11-23 15:36:33,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:33,382 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 224 [2022-11-23 15:36:33,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:33,461 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:36:33,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:36:33,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:36:33,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:36:33,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:36:33,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:36:33,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:36:33,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:33,567 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:36:33,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:36:33,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:36:33,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:36:33,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:36:33,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:36:33,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:36:33,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:33,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 218 [2022-11-23 15:36:33,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:33,746 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 220 [2022-11-23 15:36:33,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:33,759 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 230 [2022-11-23 15:36:33,915 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 7 treesize of output 3 [2022-11-23 15:36:33,928 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 7 treesize of output 3 [2022-11-23 15:36:33,998 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 7 treesize of output 3 [2022-11-23 15:36:34,016 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 7 treesize of output 3 [2022-11-23 15:36:34,259 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 [2022-11-23 15:36:34,272 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 [2022-11-23 15:36:34,287 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 [2022-11-23 15:36:34,364 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:36:34,365 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-23 15:36:34,388 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 [2022-11-23 15:36:34,447 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 15:36:34,447 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-23 15:36:35,332 INFO L321 Elim1Store]: treesize reduction 62, result has 24.4 percent of original size [2022-11-23 15:36:35,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 248 treesize of output 254 [2022-11-23 15:36:35,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:35,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-23 15:36:35,429 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 11 for LOIs [2022-11-23 15:36:35,436 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 [2022-11-23 15:36:35,442 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 [2022-11-23 15:36:35,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:36:35,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:36:35,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:36:35,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:36:35,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:35,490 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 25 treesize of output 13 [2022-11-23 15:36:35,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:35,500 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 25 treesize of output 13 [2022-11-23 15:36:35,503 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:36:50,066 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5464#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_sll_insert_~new_node~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~head#1.offset| 0) (or (not (<= (+ |ULTIMATE.start_main_~ptr~0#1.offset| 8) (select |#length| |ULTIMATE.start_main_~ptr~0#1.base|))) (not (<= 0 (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)))) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (<= |ULTIMATE.start_sll_insert_~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_insert_~head#1.base|) (<= 0 (+ |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4)) (<= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.offset|) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 1 |ULTIMATE.start_sll_insert_#in~data#1|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_sll_insert_~index#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= |ULTIMATE.start_sll_insert_~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~data#1| 1) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= 0 |ULTIMATE.start_sll_insert_~head#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_sll_insert_~data#1|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|))' at error location [2022-11-23 15:36:50,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:36:50,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:36:50,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 25] total 52 [2022-11-23 15:36:50,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114990897] [2022-11-23 15:36:50,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:36:50,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-23 15:36:50,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:50,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-23 15:36:50,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=6825, Unknown=10, NotChecked=166, Total=7310 [2022-11-23 15:36:50,068 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 53 states, 45 states have (on average 1.488888888888889) internal successors, (67), 44 states have internal predecessors, (67), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 15:36:59,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:59,044 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2022-11-23 15:36:59,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 15:36:59,045 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 45 states have (on average 1.488888888888889) internal successors, (67), 44 states have internal predecessors, (67), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2022-11-23 15:36:59,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:59,045 INFO L225 Difference]: With dead ends: 95 [2022-11-23 15:36:59,045 INFO L226 Difference]: Without dead ends: 95 [2022-11-23 15:36:59,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3311 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=708, Invalid=10842, Unknown=10, NotChecked=212, Total=11772 [2022-11-23 15:36:59,047 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 684 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:59,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 367 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1494 Invalid, 0 Unknown, 88 Unchecked, 2.8s Time] [2022-11-23 15:36:59,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-23 15:36:59,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 55. [2022-11-23 15:36:59,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 50 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:36:59,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2022-11-23 15:36:59,051 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 41 [2022-11-23 15:36:59,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:59,051 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2022-11-23 15:36:59,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 45 states have (on average 1.488888888888889) internal successors, (67), 44 states have internal predecessors, (67), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 15:36:59,052 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2022-11-23 15:36:59,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 15:36:59,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:59,052 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:59,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 15:36:59,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 15:36:59,253 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 15:36:59,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:59,253 INFO L85 PathProgramCache]: Analyzing trace with hash -462793976, now seen corresponding path program 1 times [2022-11-23 15:36:59,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:59,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087023773] [2022-11-23 15:36:59,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:59,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:37:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:37:01,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:37:01,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087023773] [2022-11-23 15:37:01,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087023773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:37:01,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287783246] [2022-11-23 15:37:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:37:01,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:37:01,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:37:01,487 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:37:01,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f6409fd-0efb-458f-878b-5b5fb7a28a19/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 15:37:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:37:01,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-23 15:37:01,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:37:01,753 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 [2022-11-23 15:37:01,766 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 [2022-11-23 15:37:01,877 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 5 treesize of output 3 [2022-11-23 15:37:01,881 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 5 treesize of output 3 [2022-11-23 15:37:02,189 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:37:02,190 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 18 [2022-11-23 15:37:02,213 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:37:02,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-23 15:37:02,437 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 5 treesize of output 3 [2022-11-23 15:37:02,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:02,758 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 14 [2022-11-23 15:37:03,347 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 17 treesize of output 9 [2022-11-23 15:37:03,366 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 5 treesize of output 3 [2022-11-23 15:37:03,372 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 7 treesize of output 3 [2022-11-23 15:37:03,380 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 5 treesize of output 3 [2022-11-23 15:37:04,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:04,053 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 25 treesize of output 25 [2022-11-23 15:37:04,076 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-23 15:37:04,076 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 15 treesize of output 15 [2022-11-23 15:37:04,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:04,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 15:37:04,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:04,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 15:37:05,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:05,074 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 61 [2022-11-23 15:37:05,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:05,085 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-23 15:37:05,308 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-23 15:37:05,308 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 118 [2022-11-23 15:37:05,332 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:37:05,332 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 121 treesize of output 114 [2022-11-23 15:37:05,528 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 108 treesize of output 80 [2022-11-23 15:37:05,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:05,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:37:05,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 37 [2022-11-23 15:37:05,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:05,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:05,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-11-23 15:37:05,785 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:37:05,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:37:07,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287783246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:37:07,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1314402166] [2022-11-23 15:37:07,943 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-23 15:37:07,943 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:37:07,944 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:37:07,944 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:37:07,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:37:07,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:07,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:07,970 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 [2022-11-23 15:37:08,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:08,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:08,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:37:08,030 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 [2022-11-23 15:37:08,036 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 [2022-11-23 15:37:08,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:37:08,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 15:37:08,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 15:37:08,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:08,076 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 25 treesize of output 13 [2022-11-23 15:37:08,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:08,087 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 25 treesize of output 13 [2022-11-23 15:37:08,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:37:08,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:08,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:08,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:37:08,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:08,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:08,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-23 15:37:08,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:08,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:08,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-23 15:37:08,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:37:08,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:08,266 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 209 [2022-11-23 15:37:08,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:37:08,280 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 209 [2022-11-23 15:37:08,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:37:08,293 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 109 [2022-11-23 15:37:08,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:08,345 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:37:08,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:37:08,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:37:08,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:37:08,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:37:08,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:37:08,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:37:08,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:08,481 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:37:08,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-23 15:37:08,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-23 15:37:08,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:37:08,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-23 15:37:08,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 15:37:08,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 15:37:08,603 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 [2022-11-23 15:37:08,612 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 [2022-11-23 15:37:08,620 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 [2022-11-23 15:37:08,651 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 7 treesize of output 5 [2022-11-23 15:37:08,661 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 19 treesize of output 7 [2022-11-23 15:37:08,672 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 5 treesize of output 3 [2022-11-23 15:37:08,699 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 7 treesize of output 5 [2022-11-23 15:37:08,708 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 19 treesize of output 7 [2022-11-23 15:37:08,720 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 5 treesize of output 3 [2022-11-23 15:37:08,748 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 [2022-11-23 15:37:08,757 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 [2022-11-23 15:37:08,767 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 [2022-11-23 15:37:08,967 INFO L321 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2022-11-23 15:37:08,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 217 [2022-11-23 15:37:09,199 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 5 treesize of output 3 [2022-11-23 15:37:09,213 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 15:37:09,226 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 15:37:09,417 INFO L321 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2022-11-23 15:37:09,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 217 [2022-11-23 15:37:10,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:37:10,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 985 treesize of output 987 [2022-11-23 15:37:10,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:37:10,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 155 treesize of output 188 [2022-11-23 15:37:10,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 147 treesize of output 139 [2022-11-23 15:37:10,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:10,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:37:10,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 147 treesize of output 131 [2022-11-23 15:37:10,777 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 5 treesize of output 3 [2022-11-23 15:37:10,932 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 7 treesize of output 3 [2022-11-23 15:37:11,107 INFO L321 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2022-11-23 15:37:11,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 217 [2022-11-23 15:37:11,276 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 5 treesize of output 3 [2022-11-23 15:37:11,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 155 treesize of output 147 [2022-11-23 15:37:11,391 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:37:11,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 147 treesize of output 180 [2022-11-23 15:37:11,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:11,420 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:37:11,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 147 treesize of output 131 [2022-11-23 15:37:11,445 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 5 treesize of output 3 [2022-11-23 15:37:11,752 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 7 treesize of output 3 [2022-11-23 15:37:12,262 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 [2022-11-23 15:37:12,433 INFO L321 Elim1Store]: treesize reduction 36, result has 57.6 percent of original size [2022-11-23 15:37:12,434 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 275 treesize of output 309 [2022-11-23 15:37:12,589 INFO L321 Elim1Store]: treesize reduction 36, result has 57.6 percent of original size [2022-11-23 15:37:12,590 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 265 treesize of output 299 [2022-11-23 15:37:13,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:18,083 INFO L321 Elim1Store]: treesize reduction 352, result has 70.7 percent of original size [2022-11-23 15:37:18,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 77 case distinctions, treesize of input 1168 treesize of output 1916 [2022-11-23 15:37:18,664 INFO L217 Elim1Store]: Index analysis took 453 ms [2022-11-23 15:37:18,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:37:23,898 INFO L321 Elim1Store]: treesize reduction 352, result has 70.7 percent of original size [2022-11-23 15:37:23,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 77 case distinctions, treesize of input 1084 treesize of output 1852