./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:22:22,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:22:22,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:22:22,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:22:22,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:22:22,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:22:22,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:22:22,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:22:22,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:22:22,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:22:22,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:22:22,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:22:22,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:22:22,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:22:22,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:22:22,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:22:22,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:22:22,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:22:22,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:22:22,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:22:22,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:22:22,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:22:22,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:22:22,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:22:22,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:22:22,561 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:22:22,561 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:22:22,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:22:22,563 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:22:22,564 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:22:22,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:22:22,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:22:22,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:22:22,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:22:22,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:22:22,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:22:22,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:22:22,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:22:22,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:22:22,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:22:22,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:22:22,574 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:22:22,599 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:22:22,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:22:22,600 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:22:22,603 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:22:22,604 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:22:22,604 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:22:22,604 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:22:22,605 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:22:22,605 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:22:22,605 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:22:22,605 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:22:22,609 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:22:22,610 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:22:22,610 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:22:22,610 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:22:22,611 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:22:22,611 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:22:22,611 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:22:22,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:22:22,612 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:22:22,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:22:22,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:22:22,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:22:22,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:22:22,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:22:22,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:22:22,616 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:22:22,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:22:22,617 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:22:22,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:22:22,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:22:22,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:22:22,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:22:22,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:22:22,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:22:22,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:22:22,621 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:22:22,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:22:22,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:22:22,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:22:22,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:22:22,622 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 [2021-11-25 20:22:22,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:22:22,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:22:22,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:22:22,955 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:22:22,955 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:22:22,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2021-11-25 20:22:23,034 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/data/e86c21bc6/ea0bf209f55d46d2baa94bf1b30b9bd2/FLAG6f579b99b [2021-11-25 20:22:23,661 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:22:23,662 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2021-11-25 20:22:23,687 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/data/e86c21bc6/ea0bf209f55d46d2baa94bf1b30b9bd2/FLAG6f579b99b [2021-11-25 20:22:23,933 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/data/e86c21bc6/ea0bf209f55d46d2baa94bf1b30b9bd2 [2021-11-25 20:22:23,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:22:23,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:22:23,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:22:23,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:22:23,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:22:23,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:22:23" (1/1) ... [2021-11-25 20:22:23,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1637df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:23, skipping insertion in model container [2021-11-25 20:22:23,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:22:23" (1/1) ... [2021-11-25 20:22:23,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:22:24,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:22:24,349 WARN L230 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_5156da59-4a2f-4809-8645-a3ad4d6990ab/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2021-11-25 20:22:24,351 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:22:24,361 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:22:24,434 WARN L230 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_5156da59-4a2f-4809-8645-a3ad4d6990ab/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2021-11-25 20:22:24,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:22:24,475 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:22:24,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:24 WrapperNode [2021-11-25 20:22:24,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:22:24,477 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:22:24,477 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:22:24,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:22:24,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:24" (1/1) ... [2021-11-25 20:22:24,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:24" (1/1) ... [2021-11-25 20:22:24,562 INFO L137 Inliner]: procedures = 128, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 148 [2021-11-25 20:22:24,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:22:24,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:22:24,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:22:24,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:22:24,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:24" (1/1) ... [2021-11-25 20:22:24,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:24" (1/1) ... [2021-11-25 20:22:24,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:24" (1/1) ... [2021-11-25 20:22:24,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:24" (1/1) ... [2021-11-25 20:22:24,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:24" (1/1) ... [2021-11-25 20:22:24,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:24" (1/1) ... [2021-11-25 20:22:24,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:24" (1/1) ... [2021-11-25 20:22:24,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:22:24,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:22:24,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:22:24,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:22:24,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:24" (1/1) ... [2021-11-25 20:22:24,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:22:24,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:22:24,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:22:24,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:22:24,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:22:24,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:22:24,708 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-25 20:22:24,709 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-25 20:22:24,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:22:24,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:22:24,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:22:24,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:22:24,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:22:24,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:22:24,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:22:24,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:22:24,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:22:24,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:22:24,811 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:22:24,812 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:22:25,143 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:22:25,226 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:22:25,226 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-25 20:22:25,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:22:25 BoogieIcfgContainer [2021-11-25 20:22:25,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:22:25,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:22:25,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:22:25,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:22:25,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:22:23" (1/3) ... [2021-11-25 20:22:25,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762b938e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:22:25, skipping insertion in model container [2021-11-25 20:22:25,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:22:24" (2/3) ... [2021-11-25 20:22:25,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762b938e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:22:25, skipping insertion in model container [2021-11-25 20:22:25,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:22:25" (3/3) ... [2021-11-25 20:22:25,239 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_insert_unequal.i [2021-11-25 20:22:25,244 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:22:25,244 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:22:25,311 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:22:25,318 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:22:25,318 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:22:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 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) [2021-11-25 20:22:25,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 20:22:25,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:25,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:25,340 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:25,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:25,346 INFO L85 PathProgramCache]: Analyzing trace with hash 24431895, now seen corresponding path program 1 times [2021-11-25 20:22:25,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:25,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618090534] [2021-11-25 20:22:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:25,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:22:25,570 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:25,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618090534] [2021-11-25 20:22:25,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618090534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:25,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:22:25,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:22:25,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62268002] [2021-11-25 20:22:25,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:25,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:22:25,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:25,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:22:25,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:22:25,608 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 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, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-25 20:22:25,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:25,672 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2021-11-25 20:22:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:22:25,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 11 [2021-11-25 20:22:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:25,681 INFO L225 Difference]: With dead ends: 43 [2021-11-25 20:22:25,682 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 20:22:25,684 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:22:25,688 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:25,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:22:25,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 20:22:25,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-11-25 20:22:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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) [2021-11-25 20:22:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2021-11-25 20:22:25,727 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 11 [2021-11-25 20:22:25,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:25,728 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2021-11-25 20:22:25,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-25 20:22:25,730 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2021-11-25 20:22:25,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 20:22:25,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:25,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:25,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:22:25,732 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:25,733 INFO L85 PathProgramCache]: Analyzing trace with hash -683449569, now seen corresponding path program 1 times [2021-11-25 20:22:25,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:25,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623999236] [2021-11-25 20:22:25,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:25,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:22:25,877 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:25,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623999236] [2021-11-25 20:22:25,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623999236] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:22:25,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308653133] [2021-11-25 20:22:25,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:25,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:22:25,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:22:25,885 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:22:25,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:22:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:26,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:22:26,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:22:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:22:26,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:22:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:22:26,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308653133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:22:26,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [150294747] [2021-11-25 20:22:26,275 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 20:22:26,276 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:22:26,280 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:22:26,285 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:22:26,286 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:22:26,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:26,409 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:22:26,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:22:26,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:26,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:26,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:26,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:26,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:26,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 20:22:26,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:26,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 20:22:26,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:26,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:22:26,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:26,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:26,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:26,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:26,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:26,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:26,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:26,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:26,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:26,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:26,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:26,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:26,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:26,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:27,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:27,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:27,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:27,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:27,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:27,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:27,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:27,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:27,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:27,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:27,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:27,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:27,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:28,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:28,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:28,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:28,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:28,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:28,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:28,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 213 treesize of output 193 [2021-11-25 20:22:28,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:28,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 207 treesize of output 195 [2021-11-25 20:22:28,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:28,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 211 treesize of output 199 [2021-11-25 20:22:28,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:28,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 148 treesize of output 128 [2021-11-25 20:22:28,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:28,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 142 treesize of output 130 [2021-11-25 20:22:28,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:28,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 134 treesize of output 122 [2021-11-25 20:22:28,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:28,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:28,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:28,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:29,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:29,122 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-25 20:22:29,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 250 treesize of output 226 [2021-11-25 20:22:29,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:29,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:22:29,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 263 treesize of output 234 [2021-11-25 20:22:29,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:29,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:22:29,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 251 treesize of output 222 [2021-11-25 20:22:29,213 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:22:29,276 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 49 for LOIs [2021-11-25 20:22:29,462 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:22:35,466 WARN L227 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 86 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:22:36,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [150294747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:22:36,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:22:36,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4, 4, 4] total 13 [2021-11-25 20:22:36,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325771284] [2021-11-25 20:22:36,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:22:36,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 20:22:36,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:36,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 20:22:36,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:22:36,549 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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) [2021-11-25 20:22:36,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:36,770 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2021-11-25 20:22:36,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:22:36,771 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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 17 [2021-11-25 20:22:36,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:36,772 INFO L225 Difference]: With dead ends: 28 [2021-11-25 20:22:36,772 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 20:22:36,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:22:36,774 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:36,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 26 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2021-11-25 20:22:36,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 20:22:36,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-25 20:22:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 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) [2021-11-25 20:22:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2021-11-25 20:22:36,784 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 17 [2021-11-25 20:22:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:36,785 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2021-11-25 20:22:36,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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) [2021-11-25 20:22:36,785 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2021-11-25 20:22:36,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 20:22:36,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:36,786 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:36,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:22:37,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-25 20:22:37,005 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:37,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:37,005 INFO L85 PathProgramCache]: Analyzing trace with hash 189853392, now seen corresponding path program 1 times [2021-11-25 20:22:37,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:37,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382385742] [2021-11-25 20:22:37,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:37,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:22:37,078 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:37,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382385742] [2021-11-25 20:22:37,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382385742] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:22:37,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433248831] [2021-11-25 20:22:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:37,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:22:37,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:22:37,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:22:37,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:22:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:37,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:22:37,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:22:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:22:37,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:22:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:22:37,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433248831] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:22:37,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [288113909] [2021-11-25 20:22:37,302 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 20:22:37,302 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:22:37,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:22:37,303 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:22:37,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:22:37,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:37,341 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:22:37,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 20:22:37,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:37,369 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:22:37,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:22:37,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:37,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:37,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:37,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 20:22:37,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:37,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 20:22:37,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:37,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:22:37,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:37,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:37,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:37,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:37,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:37,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:37,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:37,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:37,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:37,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:37,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 207 treesize of output 187 [2021-11-25 20:22:37,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:37,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 201 treesize of output 187 [2021-11-25 20:22:37,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:37,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 203 treesize of output 98 [2021-11-25 20:22:38,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:38,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:38,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:38,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:38,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:38,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:38,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:38,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:38,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:38,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:38,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:38,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:38,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:38,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:38,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:38,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:38,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:38,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:38,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:38,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 216 treesize of output 196 [2021-11-25 20:22:38,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:38,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 210 treesize of output 198 [2021-11-25 20:22:38,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:38,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 214 treesize of output 202 [2021-11-25 20:22:38,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:38,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:38,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:39,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:39,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:39,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:39,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:39,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 99 [2021-11-25 20:22:39,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 81 [2021-11-25 20:22:39,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2021-11-25 20:22:39,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:39,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:39,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2021-11-25 20:22:39,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 [2021-11-25 20:22:39,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 [2021-11-25 20:22:39,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 [2021-11-25 20:22:39,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:39,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:39,612 INFO L354 Elim1Store]: treesize reduction 41, result has 29.3 percent of original size [2021-11-25 20:22:39,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 64 treesize of output 74 [2021-11-25 20:22:39,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:39,661 INFO L354 Elim1Store]: treesize reduction 41, result has 29.3 percent of original size [2021-11-25 20:22:39,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 72 treesize of output 82 [2021-11-25 20:22:39,838 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 49 for LOIs [2021-11-25 20:22:39,992 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:22:46,281 WARN L227 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 86 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:22:47,605 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '407#(and (<= 5 |ULTIMATE.start_sll_insert_~data#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|) (not (= |ULTIMATE.start_main_~count~0#1| |ULTIMATE.start_main_~mid_index~0#1|)) (<= 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_main_~uneq~0#1| 5) (<= |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|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_insert_#in~data#1| 5) (<= 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_sll_insert_~new_node~0#1.offset| 0) (<= 5 |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|))) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_insert_~data#1| 5) (<= |ULTIMATE.start_sll_insert_~index#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= (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|) (or (and (or (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) (+ |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4))) (and (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset|))) (or (and (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset|)) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) (+ |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4)))) (or (not (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0)) (not (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0)))) (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|)) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 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 (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|) (<= 0 |ULTIMATE.start_sll_insert_~head#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 20:22:47,606 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:22:47,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:22:47,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2021-11-25 20:22:47,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025201088] [2021-11-25 20:22:47,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:22:47,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:22:47,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:47,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:22:47,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:22:47,608 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:22:47,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:22:47,650 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-11-25 20:22:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:22:47,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2021-11-25 20:22:47,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:22:47,651 INFO L225 Difference]: With dead ends: 38 [2021-11-25 20:22:47,651 INFO L226 Difference]: Without dead ends: 23 [2021-11-25 20:22:47,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:22:47,653 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:22:47,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:22:47,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-25 20:22:47,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-25 20:22:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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) [2021-11-25 20:22:47,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-11-25 20:22:47,660 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 18 [2021-11-25 20:22:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:22:47,660 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-11-25 20:22:47,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:22:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-11-25 20:22:47,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 20:22:47,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:22:47,661 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:22:47,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:22:47,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:22:47,881 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:22:47,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:22:47,881 INFO L85 PathProgramCache]: Analyzing trace with hash -518586424, now seen corresponding path program 2 times [2021-11-25 20:22:47,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:22:47,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786372080] [2021-11-25 20:22:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:22:47,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:22:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:22:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:22:48,828 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:22:48,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786372080] [2021-11-25 20:22:48,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786372080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:22:48,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275676685] [2021-11-25 20:22:48,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:22:48,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:22:48,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:22:48,830 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:22:48,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:22:49,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 20:22:49,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:22:49,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-25 20:22:49,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:22:49,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:49,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:49,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:49,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 20 [2021-11-25 20:22:49,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 22 [2021-11-25 20:22:49,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:49,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:49,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:49,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:49,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:49,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:49,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 44 treesize of output 40 [2021-11-25 20:22:49,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:49,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:49,557 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 20:22:49,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:49,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:49,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 72 [2021-11-25 20:22:49,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:49,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 20:22:49,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:49,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:49,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:49,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 16 [2021-11-25 20:22:49,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:50,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2021-11-25 20:22:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:22:50,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:22:50,162 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0)) (.cse1 (= |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0))) (and (or (forall ((v_ArrVal_387 Int) (v_ArrVal_382 (Array Int Int)) (v_ArrVal_381 (Array Int Int)) (v_ArrVal_384 (Array Int Int)) (v_ArrVal_386 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) (+ |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4) v_ArrVal_387)) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_386) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_ArrVal_382) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_381) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1|)) (and .cse0 .cse1)) (or (not .cse0) (not .cse1) (forall ((v_ArrVal_380 (Array Int Int)) (v_ArrVal_381 (Array Int Int)) (v_ArrVal_383 (Array Int Int)) (v_ArrVal_386 (Array Int Int)) (v_ArrVal_379 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_379) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_386) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_383) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_380) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_381) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1|))))) is different from false [2021-11-25 20:22:50,188 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_sll_insert_~last~0#1.offset| 0)) (.cse1 (= |c_ULTIMATE.start_sll_insert_~last~0#1.base| 0))) (and (or (forall ((v_ArrVal_380 (Array Int Int)) (v_ArrVal_381 (Array Int Int)) (v_ArrVal_383 (Array Int Int)) (v_ArrVal_386 (Array Int Int)) (v_ArrVal_379 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_379) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_386) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_383) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_380) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_381) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1|)) (not .cse0) (not .cse1)) (or (and .cse0 .cse1) (forall ((v_ArrVal_387 Int) (v_ArrVal_382 (Array Int Int)) (v_ArrVal_381 (Array Int Int)) (v_ArrVal_384 (Array Int Int)) (v_ArrVal_386 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~last~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_insert_~last~0#1.base|) (+ |c_ULTIMATE.start_sll_insert_~last~0#1.offset| 4) v_ArrVal_387)) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_386) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~last~0#1.base| v_ArrVal_382) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~last~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_381) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))) is different from false [2021-11-25 20:22:50,230 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|) 0)) (.cse0 (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|) 0))) (and (or (and .cse0 .cse1) (forall ((v_ArrVal_387 Int) (v_ArrVal_382 (Array Int Int)) (v_ArrVal_381 (Array Int Int)) (v_ArrVal_384 (Array Int Int)) (v_ArrVal_386 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|))) (select (select (store (store |c_#memory_int| .cse2 (store (select |c_#memory_int| .cse2) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|) 4) v_ArrVal_387)) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_386) (select (select (store (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_382) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_384) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_381) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) (or (forall ((v_ArrVal_380 (Array Int Int)) (v_ArrVal_381 (Array Int Int)) (v_ArrVal_383 (Array Int Int)) (v_ArrVal_386 (Array Int Int)) (v_ArrVal_379 (Array Int Int)) (v_ArrVal_378 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_379) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_386) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_383) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_378) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_380) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_381) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1|)) (not .cse1) (not .cse0)))) is different from false [2021-11-25 20:22:50,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275676685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:22:50,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [215612315] [2021-11-25 20:22:50,996 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 20:22:50,996 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:22:50,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:22:50,996 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:22:50,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:22:51,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:51,030 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:22:51,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 20:22:51,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:51,054 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:22:51,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:22:51,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:51,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 20:22:51,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:51,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:22:51,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:51,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 20:22:51,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:51,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:51,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:51,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:51,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:51,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:51,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:51,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:51,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:51,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:51,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:51,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:51,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:52,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:52,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 213 treesize of output 193 [2021-11-25 20:22:52,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:52,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 207 treesize of output 195 [2021-11-25 20:22:52,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:22:52,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 211 treesize of output 199 [2021-11-25 20:22:52,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:52,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:52,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:52,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:52,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:52,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:52,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:52,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 99 [2021-11-25 20:22:52,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 81 [2021-11-25 20:22:52,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2021-11-25 20:22:52,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:52,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:52,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2021-11-25 20:22:52,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 [2021-11-25 20:22:52,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 [2021-11-25 20:22:52,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 [2021-11-25 20:22:52,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:22:52,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:53,012 INFO L354 Elim1Store]: treesize reduction 41, result has 29.3 percent of original size [2021-11-25 20:22:53,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 64 treesize of output 74 [2021-11-25 20:22:53,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:22:53,062 INFO L354 Elim1Store]: treesize reduction 41, result has 29.3 percent of original size [2021-11-25 20:22:53,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 72 treesize of output 82 [2021-11-25 20:22:53,219 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 49 for LOIs [2021-11-25 20:22:53,357 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:22:59,738 WARN L227 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 86 DAG size of output: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:23:01,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '631#(and (<= 5 |ULTIMATE.start_sll_insert_~data#1|) (<= 0 |ULTIMATE.start_sll_insert_~new_node~0#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) (+ |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 4)) |ULTIMATE.start_sll_insert_~last~0#1.offset|) (not (= |ULTIMATE.start_main_~count~0#1| |ULTIMATE.start_main_~mid_index~0#1|)) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (= |ULTIMATE.start_main_~ptr~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~head#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (<= |ULTIMATE.start_sll_insert_~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~temp~2#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4))) (<= 0 |ULTIMATE.start_sll_insert_~head#1.base|) (<= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_sll_insert_#in~data#1| 5) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= |ULTIMATE.start_main_~count~0#1| 0) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 5 |ULTIMATE.start_sll_insert_#in~data#1|) (not (= |ULTIMATE.start_main_~data~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) |ULTIMATE.start_main_~ptr~0#1.offset|))) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_insert_~data#1| 5) (<= |ULTIMATE.start_sll_insert_~index#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) (+ |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 4)) |ULTIMATE.start_sll_insert_~last~0#1.base|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (or (and (or (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) (+ |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4))) (and (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset|))) (or (and (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset|)) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) (+ |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4)))) (or (not (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0)) (not (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0)))) (and (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~head#1.base|) |ULTIMATE.start_sll_insert_~head#1.offset|)) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~head#1.base|) |ULTIMATE.start_sll_insert_~head#1.offset|) |ULTIMATE.start_sll_insert_~new_node~0#1.base|))) (<= 0 |#NULL.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) |ULTIMATE.start_main_~temp~2#1.offset|) (<= 0 |ULTIMATE.start_sll_insert_~head#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 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|) (= |#NULL.base| 0))' at error location [2021-11-25 20:23:01,764 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:23:01,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:23:01,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-11-25 20:23:01,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037550566] [2021-11-25 20:23:01,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:23:01,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 20:23:01,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:01,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 20:23:01,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1378, Unknown=4, NotChecked=228, Total=1722 [2021-11-25 20:23:01,766 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 26 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:23:02,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:02,816 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2021-11-25 20:23:02,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:23:02,817 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 24 [2021-11-25 20:23:02,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:02,818 INFO L225 Difference]: With dead ends: 39 [2021-11-25 20:23:02,818 INFO L226 Difference]: Without dead ends: 37 [2021-11-25 20:23:02,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=171, Invalid=2093, Unknown=4, NotChecked=282, Total=2550 [2021-11-25 20:23:02,821 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 43 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:02,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 133 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 441 Invalid, 0 Unknown, 23 Unchecked, 0.5s Time] [2021-11-25 20:23:02,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-25 20:23:02,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2021-11-25 20:23:02,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 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) [2021-11-25 20:23:02,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-11-25 20:23:02,831 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 24 [2021-11-25 20:23:02,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:02,831 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-11-25 20:23:02,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:23:02,832 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-11-25 20:23:02,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 20:23:02,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:02,833 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:23:02,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:23:03,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:03,061 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:03,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:03,061 INFO L85 PathProgramCache]: Analyzing trace with hash -518507343, now seen corresponding path program 1 times [2021-11-25 20:23:03,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:03,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408232763] [2021-11-25 20:23:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:03,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:23:03,453 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:03,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408232763] [2021-11-25 20:23:03,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408232763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:23:03,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725048186] [2021-11-25 20:23:03,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:03,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:03,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:23:03,454 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:23:03,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:23:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:03,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 20:23:03,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:23:03,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 10 [2021-11-25 20:23:03,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:03,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:04,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 48 treesize of output 28 [2021-11-25 20:23:04,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 16 [2021-11-25 20:23:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:23:04,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:23:04,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:23:04,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 67 [2021-11-25 20:23:04,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:23:04,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 61 [2021-11-25 20:23:04,208 WARN L838 $PredicateComparison]: unable to prove that (and (or (not (= |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0)) (forall ((v_ArrVal_539 (Array Int Int)) (v_ArrVal_540 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_539) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_540) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0)))) (forall ((v_ArrVal_538 (Array Int Int)) (v_ArrVal_540 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_ArrVal_538) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_540) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0))) (< 0 |c_ULTIMATE.start_main_~mid_index~0#1|)) is different from false [2021-11-25 20:23:04,226 WARN L838 $PredicateComparison]: unable to prove that (or (and (forall ((v_ArrVal_538 (Array Int Int)) (v_ArrVal_540 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~last~0#1.base| v_ArrVal_538) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_540) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0))) (or (forall ((v_ArrVal_539 (Array Int Int)) (v_ArrVal_540 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_539) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_540) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0))) (not (= |c_ULTIMATE.start_sll_insert_~last~0#1.base| 0))) (< 0 |c_ULTIMATE.start_main_~mid_index~0#1|)) (<= |c_ULTIMATE.start_sll_insert_~index#1| 0)) is different from false [2021-11-25 20:23:04,246 WARN L838 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_sll_insert_~index#1| 0) (and (forall ((v_ArrVal_538 (Array Int Int)) (v_ArrVal_540 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|) v_ArrVal_538) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_540) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0))) (or (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|) 0)) (forall ((v_ArrVal_539 (Array Int Int)) (v_ArrVal_540 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_539) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_540) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0)))) (< 0 |c_ULTIMATE.start_main_~mid_index~0#1|))) is different from false [2021-11-25 20:23:04,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725048186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:23:04,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [219662945] [2021-11-25 20:23:04,443 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 20:23:04,443 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:23:04,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:23:04,444 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:23:04,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:23:04,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,476 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:23:04,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:23:04,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:04,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:04,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:04,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 20:23:04,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 20:23:04,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:23:04,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:04,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:04,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:04,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:04,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:04,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:04,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:04,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:04,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:04,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:05,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:05,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:05,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:05,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:05,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:05,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:05,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:05,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:05,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:05,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:05,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:05,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:05,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:05,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:05,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:05,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:05,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:05,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:05,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:05,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 216 treesize of output 196 [2021-11-25 20:23:05,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:05,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 210 treesize of output 198 [2021-11-25 20:23:05,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:05,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 214 treesize of output 202 [2021-11-25 20:23:05,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:05,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 148 treesize of output 128 [2021-11-25 20:23:05,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:05,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 142 treesize of output 130 [2021-11-25 20:23:05,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:05,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 134 treesize of output 122 [2021-11-25 20:23:05,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:05,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:05,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:05,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:06,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 99 [2021-11-25 20:23:06,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 81 [2021-11-25 20:23:06,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2021-11-25 20:23:06,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:06,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2021-11-25 20:23:06,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:06,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 [2021-11-25 20:23:06,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 [2021-11-25 20:23:06,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 [2021-11-25 20:23:06,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:06,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:06,368 INFO L354 Elim1Store]: treesize reduction 41, result has 29.3 percent of original size [2021-11-25 20:23:06,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 64 treesize of output 74 [2021-11-25 20:23:06,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:06,440 INFO L354 Elim1Store]: treesize reduction 41, result has 29.3 percent of original size [2021-11-25 20:23:06,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 72 treesize of output 82 [2021-11-25 20:23:06,706 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 49 for LOIs [2021-11-25 20:23:06,836 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:23:14,151 WARN L227 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 86 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:23:15,790 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '877#(and (<= 5 |ULTIMATE.start_sll_insert_~data#1|) (<= 0 |ULTIMATE.start_sll_insert_~new_node~0#1.offset|) (= (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$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_insert_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_insert_~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (or (and (= |ULTIMATE.start_main_~ptr~0#1.offset| 0) (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (= |ULTIMATE.start_main_~count~0#1| |ULTIMATE.start_main_~mid_index~0#1|)) (<= 0 |ULTIMATE.start_sll_insert_~head#1.base|) (<= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_sll_insert_#in~data#1| 5) (not (= |ULTIMATE.start_main_~uneq~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) |ULTIMATE.start_main_~ptr~0#1.offset|))) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.offset|) (= |ULTIMATE.start_main_~count~0#1| 0) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 5 |ULTIMATE.start_sll_insert_#in~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_insert_~data#1| 5) (<= |ULTIMATE.start_sll_insert_~index#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) (+ |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 4)) |ULTIMATE.start_sll_insert_~last~0#1.base|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (or (and (or (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) (+ |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4))) (and (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset|))) (or (and (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset|)) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) (+ |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4)))) (or (not (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0)) (not (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0)))) (and (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~head#1.base|) |ULTIMATE.start_sll_insert_~head#1.offset|)) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0) (= (select (select |#memory_$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|))) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_sll_insert_~head#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 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|) (= |#NULL.base| 0))' at error location [2021-11-25 20:23:15,790 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:23:15,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:23:15,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-11-25 20:23:15,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138426126] [2021-11-25 20:23:15,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:23:15,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 20:23:15,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:15,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 20:23:15,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1214, Unknown=11, NotChecked=216, Total=1560 [2021-11-25 20:23:15,792 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:23:16,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:16,368 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-11-25 20:23:16,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 20:23:16,369 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 24 [2021-11-25 20:23:16,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:16,369 INFO L225 Difference]: With dead ends: 40 [2021-11-25 20:23:16,370 INFO L226 Difference]: Without dead ends: 34 [2021-11-25 20:23:16,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=156, Invalid=1649, Unknown=13, NotChecked=252, Total=2070 [2021-11-25 20:23:16,371 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:16,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 244 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 278 Invalid, 0 Unknown, 24 Unchecked, 0.3s Time] [2021-11-25 20:23:16,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-25 20:23:16,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2021-11-25 20:23:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 20:23:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2021-11-25 20:23:16,381 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 24 [2021-11-25 20:23:16,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:16,382 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2021-11-25 20:23:16,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:23:16,382 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2021-11-25 20:23:16,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 20:23:16,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:16,383 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:23:16,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:23:16,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:16,589 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:16,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:16,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1005643591, now seen corresponding path program 3 times [2021-11-25 20:23:16,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:16,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524751656] [2021-11-25 20:23:16,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:16,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:23:16,649 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:16,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524751656] [2021-11-25 20:23:16,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524751656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:16,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:23:16,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:23:16,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109126718] [2021-11-25 20:23:16,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:16,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:23:16,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:16,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:23:16,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:23:16,651 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2021-11-25 20:23:16,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:16,696 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2021-11-25 20:23:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:23:16,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 25 [2021-11-25 20:23:16,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:16,698 INFO L225 Difference]: With dead ends: 34 [2021-11-25 20:23:16,698 INFO L226 Difference]: Without dead ends: 25 [2021-11-25 20:23:16,698 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:23:16,699 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:16,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 25 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:23:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-25 20:23:16,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-25 20:23:16,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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) [2021-11-25 20:23:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-11-25 20:23:16,707 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 25 [2021-11-25 20:23:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:16,707 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-11-25 20:23:16,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2021-11-25 20:23:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-11-25 20:23:16,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 20:23:16,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:16,709 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:23:16,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:23:16,709 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:16,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:16,710 INFO L85 PathProgramCache]: Analyzing trace with hash -145334749, now seen corresponding path program 1 times [2021-11-25 20:23:16,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:16,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076084959] [2021-11-25 20:23:16,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:16,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:23:16,814 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:16,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076084959] [2021-11-25 20:23:16,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076084959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:23:16,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756419678] [2021-11-25 20:23:16,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:16,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:16,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:23:16,816 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:23:16,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:23:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:16,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:23:16,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:23:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:23:17,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:23:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:23:17,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756419678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:23:17,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [5525400] [2021-11-25 20:23:17,115 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 20:23:17,116 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:23:17,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:23:17,116 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:23:17,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:23:17,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:17,163 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:23:17,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:23:17,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:17,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:17,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:17,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:17,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:17,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 20:23:17,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:17,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 20:23:17,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:17,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:23:17,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:17,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:17,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:17,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:17,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:17,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:17,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:17,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:17,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:17,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:17,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:17,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:17,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:17,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:17,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:17,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:17,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:17,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:17,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:17,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:17,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:17,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:17,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:18,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:18,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:18,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:18,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:18,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:18,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:18,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:18,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:18,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:18,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:18,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 216 treesize of output 196 [2021-11-25 20:23:18,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:18,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 210 treesize of output 198 [2021-11-25 20:23:18,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:18,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 214 treesize of output 202 [2021-11-25 20:23:18,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:18,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 148 treesize of output 128 [2021-11-25 20:23:18,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:18,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 142 treesize of output 130 [2021-11-25 20:23:18,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:18,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 134 treesize of output 122 [2021-11-25 20:23:18,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:18,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:18,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:18,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:18,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 99 [2021-11-25 20:23:18,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 81 [2021-11-25 20:23:18,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2021-11-25 20:23:18,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2021-11-25 20:23:18,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:18,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:18,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 [2021-11-25 20:23:18,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:18,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:18,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:18,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:18,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:18,997 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:23:18,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 86 treesize of output 96 [2021-11-25 20:23:19,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 [2021-11-25 20:23:19,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:19,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 7 [2021-11-25 20:23:19,073 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:23:19,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 170 treesize of output 170 [2021-11-25 20:23:19,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 [2021-11-25 20:23:19,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:23:19,149 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:23:19,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:19,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 7 [2021-11-25 20:23:19,462 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 49 for LOIs [2021-11-25 20:23:19,602 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:23:25,988 WARN L227 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 86 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:23:26,831 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1259#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 5 |ULTIMATE.start_sll_insert_~data#1|) (not (= |ULTIMATE.start_main_~count~0#1| |ULTIMATE.start_main_~mid_index~0#1|)) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |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$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4))) (<= 0 |ULTIMATE.start_sll_insert_~head#1.base|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_insert_#in~data#1| 5) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.offset|) (<= 0 |ULTIMATE.start_sll_insert_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (<= 5 |ULTIMATE.start_sll_insert_#in~data#1|) (not (= |ULTIMATE.start_main_~data~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) |ULTIMATE.start_main_~ptr~0#1.offset|))) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_insert_~data#1| 5) (<= |ULTIMATE.start_sll_insert_~index#1| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) |ULTIMATE.start_main_~temp~2#1.offset|) (<= 0 |ULTIMATE.start_sll_insert_~head#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 20:23:26,831 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:23:26,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:23:26,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-25 20:23:26,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113448952] [2021-11-25 20:23:26,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:23:26,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 20:23:26,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:26,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 20:23:26,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-11-25 20:23:26,833 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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) [2021-11-25 20:23:26,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:26,948 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-11-25 20:23:26,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:23:26,949 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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) Word has length 26 [2021-11-25 20:23:26,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:26,950 INFO L225 Difference]: With dead ends: 34 [2021-11-25 20:23:26,950 INFO L226 Difference]: Without dead ends: 26 [2021-11-25 20:23:26,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-11-25 20:23:26,952 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:26,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 58 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:23:26,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-25 20:23:26,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-11-25 20:23:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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) [2021-11-25 20:23:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-25 20:23:26,960 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 26 [2021-11-25 20:23:26,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:26,960 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-25 20:23:26,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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) [2021-11-25 20:23:26,961 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-25 20:23:26,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 20:23:26,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:26,962 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:23:27,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:23:27,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:27,175 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:27,176 INFO L85 PathProgramCache]: Analyzing trace with hash -145255668, now seen corresponding path program 1 times [2021-11-25 20:23:27,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:27,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683811435] [2021-11-25 20:23:27,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:27,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:23:27,867 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:27,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683811435] [2021-11-25 20:23:27,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683811435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:23:27,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671484355] [2021-11-25 20:23:27,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:27,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:27,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:23:27,873 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:23:27,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5156da59-4a2f-4809-8645-a3ad4d6990ab/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:23:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:28,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-25 20:23:28,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:23:28,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:28,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 15 [2021-11-25 20:23:28,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:28,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:28,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:28,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:28,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:28,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:28,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:28,423 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 20:23:28,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:28,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:28,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 80 [2021-11-25 20:23:28,686 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-25 20:23:28,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 195 treesize of output 156 [2021-11-25 20:23:28,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:28,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 68 treesize of output 37 [2021-11-25 20:23:28,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:28,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 94 [2021-11-25 20:23:28,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 34 [2021-11-25 20:23:28,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:28,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:28,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-25 20:23:28,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:23:28,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:28,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:23:28,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 107 treesize of output 55 [2021-11-25 20:23:28,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:23:28,792 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 20:23:28,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 20:23:28,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:23:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:23:28,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:23:29,014 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0)) (.cse6 (= |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0))) (and (or (not .cse0) (forall ((v_ArrVal_897 (Array Int Int)) (v_ArrVal_892 Int) (v_ArrVal_890 (Array Int Int)) (v_ArrVal_891 (Array Int Int)) (v_ArrVal_893 (Array Int Int)) (v_ArrVal_896 (Array Int Int))) (= |c_ULTIMATE.start_main_~uneq~0#1| (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_896) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_897)) (.cse2 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_893) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_890))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (+ (select (select .cse5 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_891))) (store .cse1 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select .cse1 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) (+ |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset| 4) v_ArrVal_892))) (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4)))))) (not .cse6)) (or (forall ((v_ArrVal_898 (Array Int Int)) (v_ArrVal_897 (Array Int Int)) (v_ArrVal_892 Int) (v_ArrVal_890 (Array Int Int))) (= |c_ULTIMATE.start_main_~uneq~0#1| (let ((.cse12 (+ |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 4))) (let ((.cse11 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) .cse12 |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset|)) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_897)) (.cse8 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base|) .cse12 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|)) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_890))) (let ((.cse9 (select (select .cse8 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse10 (+ (select (select .cse11 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_ArrVal_898))) (store .cse7 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select .cse7 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) (+ |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset| 4) v_ArrVal_892))) (select (select .cse8 .cse9) .cse10)) (select (select .cse11 .cse9) .cse10))))))) (and .cse0 .cse6)))) is different from false [2021-11-25 20:23:29,055 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (= |c_ULTIMATE.start_sll_insert_~last~0#1.offset| 0)) (.cse6 (= |c_ULTIMATE.start_sll_insert_~last~0#1.base| 0))) (and (or (forall ((v_ArrVal_897 (Array Int Int)) (v_ArrVal_892 Int) (v_ArrVal_890 (Array Int Int)) (v_ArrVal_891 (Array Int Int)) (v_ArrVal_893 (Array Int Int)) (v_ArrVal_896 (Array Int Int))) (= |c_ULTIMATE.start_main_~uneq~0#1| (let ((.cse4 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_896) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_897)) (.cse1 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_893) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_890))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse3 (+ (select (select .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_891))) (store .cse0 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select .cse0 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) (+ |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset| 4) v_ArrVal_892))) (select (select .cse1 .cse2) .cse3)) (select (select .cse4 .cse2) .cse3)))))) (not .cse5) (not .cse6)) (or (forall ((v_ArrVal_898 (Array Int Int)) (v_ArrVal_897 (Array Int Int)) (v_ArrVal_892 Int) (v_ArrVal_890 (Array Int Int))) (= |c_ULTIMATE.start_main_~uneq~0#1| (let ((.cse12 (+ |c_ULTIMATE.start_sll_insert_~last~0#1.offset| 4))) (let ((.cse11 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~last~0#1.base|) .cse12 |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset|)) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_897)) (.cse8 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~last~0#1.base|) .cse12 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|)) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_890))) (let ((.cse9 (select (select .cse8 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse10 (+ (select (select .cse11 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~last~0#1.base| v_ArrVal_898))) (store .cse7 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select .cse7 |c_ULTIMATE.start_sll_insert_~new_node~0#1.base|) (+ |c_ULTIMATE.start_sll_insert_~new_node~0#1.offset| 4) v_ArrVal_892))) (select (select .cse8 .cse9) .cse10)) (select (select .cse11 .cse9) .cse10))))))) (and .cse5 .cse6)))) is different from false [2021-11-25 20:23:29,092 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|) 0)) (.cse0 (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|) 0))) (and (or (and .cse0 .cse1) (forall ((v_ArrVal_898 (Array Int Int)) (v_ArrVal_897 (Array Int Int)) (v_ArrVal_892 Int) (v_ArrVal_890 (Array Int Int))) (= |c_ULTIMATE.start_main_~uneq~0#1| (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|)) (.cse8 (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|) 4))) (let ((.cse7 (store (store |c_#memory_$Pointer$.offset| .cse3 (store (select |c_#memory_$Pointer$.offset| .cse3) .cse8 |c_ULTIMATE.start_sll_insert_#t~ret7#1.offset|)) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_897)) (.cse4 (store (store |c_#memory_$Pointer$.base| .cse3 (store (select |c_#memory_$Pointer$.base| .cse3) .cse8 |c_ULTIMATE.start_sll_insert_#t~ret7#1.base|)) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_890))) (let ((.cse5 (select (select .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (+ (select (select .cse7 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (let ((.cse2 (store |c_#memory_int| .cse3 v_ArrVal_898))) (store .cse2 |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_insert_#t~ret7#1.base|) (+ |c_ULTIMATE.start_sll_insert_#t~ret7#1.offset| 4) v_ArrVal_892))) (select (select .cse4 .cse5) .cse6)) (select (select .cse7 .cse5) .cse6)))))))) (or (not .cse1) (not .cse0) (forall ((v_ArrVal_897 (Array Int Int)) (v_ArrVal_892 Int) (v_ArrVal_890 (Array Int Int)) (v_ArrVal_891 (Array Int Int)) (v_ArrVal_893 (Array Int Int)) (v_ArrVal_896 (Array Int Int))) (= |c_ULTIMATE.start_main_~uneq~0#1| (let ((.cse13 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_896) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_897)) (.cse10 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_893) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_890))) (let ((.cse11 (select (select .cse10 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse12 (+ (select (select .cse13 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_sll_insert_~head#1.base| v_ArrVal_891))) (store .cse9 |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| (store (select .cse9 |c_ULTIMATE.start_sll_insert_#t~ret7#1.base|) (+ |c_ULTIMATE.start_sll_insert_#t~ret7#1.offset| 4) v_ArrVal_892))) (select (select .cse10 .cse11) .cse12)) (select (select .cse13 .cse11) .cse12))))))))) is different from false [2021-11-25 20:23:29,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:23:29,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 484 treesize of output 461 [2021-11-25 20:23:29,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:23:29,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 4205 treesize of output 4211 [2021-11-25 20:23:29,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4014 treesize of output 3842 [2021-11-25 20:23:29,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4398 treesize of output 3854 [2021-11-25 20:23:31,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 3 [2021-11-25 20:23:34,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 3 [2021-11-25 20:23:38,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 986 treesize of output 850 [2021-11-25 20:23:51,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 139 treesize of output 3 [2021-11-25 20:24:13,331 WARN L227 SmtUtils]: Spent 10.81s on a formula simplification that was a NOOP. DAG size: 405 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 20:24:13,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:24:13,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 5542 treesize of output 13520