./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:12:19,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:12:19,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:12:19,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:12:19,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:12:19,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:12:19,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:12:19,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:12:19,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:12:19,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:12:19,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:12:19,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:12:19,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:12:19,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:12:19,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:12:19,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:12:19,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:12:19,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:12:19,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:12:19,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:12:19,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:12:19,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:12:19,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:12:19,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:12:19,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:12:19,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:12:19,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:12:19,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:12:19,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:12:19,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:12:19,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:12:19,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:12:19,641 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:12:19,642 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:12:19,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:12:19,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:12:19,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:12:19,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:12:19,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:12:19,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:12:19,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:12:19,649 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:12:19,698 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:12:19,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:12:19,699 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:12:19,699 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:12:19,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:12:19,700 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:12:19,701 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:12:19,701 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:12:19,701 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:12:19,701 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:12:19,702 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:12:19,703 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:12:19,703 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:12:19,703 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:12:19,703 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:12:19,704 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:12:19,704 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:12:19,704 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:12:19,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:12:19,706 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:12:19,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:12:19,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:12:19,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:12:19,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:12:19,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:12:19,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:12:19,708 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:12:19,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:12:19,708 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:12:19,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:12:19,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:12:19,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:12:19,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:12:19,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:12:19,710 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:12:19,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:12:19,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:12:19,711 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:12:19,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:12:19,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:12:19,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:12:19,712 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2022-11-26 00:12:20,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:12:20,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:12:20,115 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:12:20,117 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:12:20,117 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:12:20,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2022-11-26 00:12:23,458 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:12:23,794 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:12:23,797 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2022-11-26 00:12:23,807 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/data/928fc2833/dd13f3b5f7524a579af245b4dda704d2/FLAG30d157bcf [2022-11-26 00:12:23,823 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/data/928fc2833/dd13f3b5f7524a579af245b4dda704d2 [2022-11-26 00:12:23,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:12:23,828 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:12:23,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:12:23,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:12:23,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:12:23,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:12:23" (1/1) ... [2022-11-26 00:12:23,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33697558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:23, skipping insertion in model container [2022-11-26 00:12:23,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:12:23" (1/1) ... [2022-11-26 00:12:23,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:12:23,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:12:24,290 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2022-11-26 00:12:24,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:12:24,336 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:12:24,370 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2022-11-26 00:12:24,385 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:12:24,416 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:12:24,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:24 WrapperNode [2022-11-26 00:12:24,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:12:24,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:12:24,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:12:24,419 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:12:24,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:24" (1/1) ... [2022-11-26 00:12:24,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:24" (1/1) ... [2022-11-26 00:12:24,474 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 200 [2022-11-26 00:12:24,475 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:12:24,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:12:24,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:12:24,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:12:24,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:24" (1/1) ... [2022-11-26 00:12:24,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:24" (1/1) ... [2022-11-26 00:12:24,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:24" (1/1) ... [2022-11-26 00:12:24,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:24" (1/1) ... [2022-11-26 00:12:24,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:24" (1/1) ... [2022-11-26 00:12:24,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:24" (1/1) ... [2022-11-26 00:12:24,512 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:24" (1/1) ... [2022-11-26 00:12:24,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:24" (1/1) ... [2022-11-26 00:12:24,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:12:24,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:12:24,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:12:24,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:12:24,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:24" (1/1) ... [2022-11-26 00:12:24,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:12:24,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:24,565 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:12:24,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:12:24,613 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-11-26 00:12:24,613 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-11-26 00:12:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:12:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:12:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:12:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 00:12:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 00:12:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2022-11-26 00:12:24,615 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2022-11-26 00:12:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:12:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-26 00:12:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2022-11-26 00:12:24,616 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2022-11-26 00:12:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:12:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2022-11-26 00:12:24,616 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2022-11-26 00:12:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:12:24,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:12:24,833 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:12:24,836 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:12:25,318 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:12:25,443 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:12:25,446 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2022-11-26 00:12:25,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:12:25 BoogieIcfgContainer [2022-11-26 00:12:25,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:12:25,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:12:25,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:12:25,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:12:25,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:12:23" (1/3) ... [2022-11-26 00:12:25,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de8c44d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:12:25, skipping insertion in model container [2022-11-26 00:12:25,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:24" (2/3) ... [2022-11-26 00:12:25,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de8c44d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:12:25, skipping insertion in model container [2022-11-26 00:12:25,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:12:25" (3/3) ... [2022-11-26 00:12:25,472 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2022-11-26 00:12:25,496 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:12:25,497 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:12:25,567 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:12:25,576 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@78c8dae4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:12:25,576 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:12:25,581 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 65 states have internal predecessors, (97), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-26 00:12:25,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:12:25,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:25,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:12:25,591 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:12:25,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:25,598 INFO L85 PathProgramCache]: Analyzing trace with hash -996344974, now seen corresponding path program 1 times [2022-11-26 00:12:25,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:25,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879035145] [2022-11-26 00:12:25,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:25,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:25,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:25,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879035145] [2022-11-26 00:12:25,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879035145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:12:25,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:12:25,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:12:25,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779524850] [2022-11-26 00:12:25,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:25,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:12:25,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:25,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:12:25,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:12:25,898 INFO L87 Difference]: Start difference. First operand has 78 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 65 states have internal predecessors, (97), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:25,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:25,991 INFO L93 Difference]: Finished difference Result 151 states and 261 transitions. [2022-11-26 00:12:25,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:12:25,994 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:12:25,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:26,005 INFO L225 Difference]: With dead ends: 151 [2022-11-26 00:12:26,005 INFO L226 Difference]: Without dead ends: 74 [2022-11-26 00:12:26,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:12:26,015 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:26,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:12:26,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-26 00:12:26,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-26 00:12:26,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 62 states have internal predecessors, (69), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:12:26,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2022-11-26 00:12:26,071 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 13 [2022-11-26 00:12:26,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:26,071 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2022-11-26 00:12:26,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:26,072 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2022-11-26 00:12:26,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-26 00:12:26,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:26,074 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:12:26,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:12:26,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:12:26,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:26,076 INFO L85 PathProgramCache]: Analyzing trace with hash -811379383, now seen corresponding path program 1 times [2022-11-26 00:12:26,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:26,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672091340] [2022-11-26 00:12:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:26,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:29,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:29,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672091340] [2022-11-26 00:12:29,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672091340] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:29,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41041598] [2022-11-26 00:12:29,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:29,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:29,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:29,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:29,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:12:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:29,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-26 00:12:29,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:29,976 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-26 00:12:29,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-26 00:12:29,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:12:30,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-26 00:12:30,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:30,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 9 [2022-11-26 00:12:30,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-26 00:12:30,164 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) (or (exists ((v_DerPreprocessor_3 (Array Int Int)) (v_DerPreprocessor_2 (Array Int Int))) (let ((.cse0 (select v_DerPreprocessor_3 |c_chain_node_#in~ppnode#1.offset|))) (and (= .cse0 .cse1) (not (= .cse0 0)) (not (= .cse0 |c_chain_node_#in~ppnode#1.base|)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_2) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_3) .cse0 v_DerPreprocessor_2) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_3) .cse0) (select |c_#memory_$Pointer$.base| .cse0))))) (and (= .cse1 |c_chain_node_#in~ppnode#1.base|) (not (= .cse1 0))))) is different from true [2022-11-26 00:12:30,616 INFO L321 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2022-11-26 00:12:30,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 94 [2022-11-26 00:12:30,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-26 00:12:30,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:12:30,881 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:12:30,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-26 00:12:30,949 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:12:30,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 8 [2022-11-26 00:12:30,986 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_309 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_310 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (not (= |chain_node_~node~0#1.base| 0)) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_309) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_310) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$.base|))) is different from true [2022-11-26 00:12:31,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:31,092 INFO L321 Elim1Store]: treesize reduction 61, result has 37.1 percent of original size [2022-11-26 00:12:31,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 104 [2022-11-26 00:12:31,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:12:31,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-26 00:12:31,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 36 [2022-11-26 00:12:31,298 INFO L321 Elim1Store]: treesize reduction 73, result has 19.8 percent of original size [2022-11-26 00:12:31,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 64 [2022-11-26 00:12:31,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-26 00:12:31,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-26 00:12:31,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:12:31,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 81 [2022-11-26 00:12:31,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:12:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-26 00:12:31,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:32,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41041598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:32,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [647892307] [2022-11-26 00:12:32,155 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-26 00:12:32,155 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:12:32,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:12:32,167 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:12:32,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:12:32,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:32,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:32,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:32,338 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-26 00:12:32,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-26 00:12:32,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:32,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:32,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:32,474 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-26 00:12:32,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-26 00:12:32,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:12:32,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:32,656 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-11-26 00:12:32,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 35 [2022-11-26 00:12:32,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:12:32,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:32,771 INFO L321 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2022-11-26 00:12:32,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 382 treesize of output 186 [2022-11-26 00:12:32,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:32,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:32,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 23 [2022-11-26 00:12:32,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-26 00:12:32,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:32,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:32,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 23 [2022-11-26 00:12:32,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-26 00:12:32,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,015 INFO L321 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2022-11-26 00:12:33,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 382 treesize of output 158 [2022-11-26 00:12:33,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:33,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:33,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 13 [2022-11-26 00:12:33,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-26 00:12:33,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:33,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:33,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 13 [2022-11-26 00:12:33,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-26 00:12:33,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-26 00:12:33,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-11-26 00:12:33,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:12:33,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:12:33,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-26 00:12:33,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:12:33,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-11-26 00:12:33,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:12:34,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:12:34,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:34,119 INFO L321 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2022-11-26 00:12:34,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 651 treesize of output 648 [2022-11-26 00:12:34,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:34,227 INFO L321 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-26 00:12:34,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 591 treesize of output 523 [2022-11-26 00:12:34,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 119 [2022-11-26 00:12:34,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2022-11-26 00:12:34,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2022-11-26 00:12:34,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 52 [2022-11-26 00:12:34,413 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:12:34,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2022-11-26 00:12:34,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:12:34,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 66 [2022-11-26 00:12:34,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:12:34,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2022-11-26 00:12:34,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:12:34,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 34 [2022-11-26 00:12:34,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:12:34,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:12:35,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:35,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:35,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:35,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:35,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:35,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2022-11-26 00:12:35,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:35,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:35,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:35,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:35,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:35,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:12:35,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 34 [2022-11-26 00:12:35,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:12:35,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:12:35,803 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-26 00:12:35,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 666 treesize of output 677 [2022-11-26 00:12:35,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:12:37,452 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 151 for LOIs [2022-11-26 00:12:37,888 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 164 for LOIs [2022-11-26 00:12:38,294 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 143 for LOIs [2022-11-26 00:12:38,376 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:12:51,888 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '546#(or (and (exists ((v_DerPreprocessor_10 (Array Int Int)) (|v_ULTIMATE.start_create_sll_~#list~0#1.base_21| Int) (v_DerPreprocessor_11 (Array Int Int)) (v_DerPreprocessor_13 (Array Int Int)) (|v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5| Int) (v_DerPreprocessor_14 (Array Int Int))) (and (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) 0) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|)) (= v_DerPreprocessor_13 (select (store (store (store (store |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_13) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_14) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_13) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_14) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0))) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5|) 0) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_13) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_14) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_13) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_14) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 0) 0) (= (select v_DerPreprocessor_14 0) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_13) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_14) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_13) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_14) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 4) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_11) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_11) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 0) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 4) 0) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5| 0)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_11) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_11) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 4) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|)) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 8) (<= 0 |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 4) 0) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) 0)) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| 0)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5|) 0) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) (select v_DerPreprocessor_11 0)) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0)) 1) (= v_DerPreprocessor_10 (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_11) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) v_DerPreprocessor_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_DerPreprocessor_11) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0))) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5| 2)) (< (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) |#StackHeapBarrier|))) (= |#NULL.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (exists ((v_prenex_10 (Array Int Int)) (|v_ULTIMATE.start_create_sll_~#list~0#1.base_21| Int) (v_prenex_13 (Array Int Int)) (v_prenex_12 (Array Int Int)) (v_prenex_11 (Array Int Int)) (|v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5| Int)) (and (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| (select v_prenex_11 0))) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) 0) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) (= (select (select |#memory_$Pointer$.base| (select v_prenex_11 0)) 4) 0) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|)) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select v_prenex_11 0) v_prenex_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_11) (select v_prenex_11 0) v_prenex_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_11) (select v_prenex_11 0)) 4) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) (select v_prenex_11 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5|) 0) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select v_prenex_11 0) v_prenex_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_11) (select v_prenex_11 0) v_prenex_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_11) (select v_prenex_11 0)) 0) 0) (= v_prenex_12 (select (store (store (store (store |#memory_$Pointer$.offset| (select v_prenex_11 0) v_prenex_12) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_13) (select v_prenex_11 0) v_prenex_12) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_13) (select v_prenex_11 0))) (< (select v_prenex_11 0) |#StackHeapBarrier|) (= (select |#length| (select v_prenex_11 0)) 8) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5| 0)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) (not (= (select v_prenex_11 0) 0)) (<= 0 |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5|) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|)) (= (select (select |#memory_$Pointer$.offset| (select v_prenex_11 0)) 4) 0) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| 0)) (= (select v_prenex_13 0) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5|) 0) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.offset| (select v_prenex_11 0) v_prenex_12) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_13) (select v_prenex_11 0) v_prenex_12) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_13) (select v_prenex_11 0)) 0) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.offset| (select v_prenex_11 0) v_prenex_12) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_13) (select v_prenex_11 0) v_prenex_12) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_13) (select v_prenex_11 0)) 4) 0) (= (select |#valid| (select v_prenex_11 0)) 1) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_5| 2)) (= (select (store (store (store (store |#memory_$Pointer$.base| (select v_prenex_11 0) v_prenex_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_11) (select v_prenex_11 0) v_prenex_10) |v_ULTIMATE.start_create_sll_~#list~0#1.base_21| v_prenex_11) (select v_prenex_11 0)) v_prenex_10))) (= |#NULL.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)))' at error location [2022-11-26 00:12:51,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:12:51,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:12:51,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-11-26 00:12:51,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417279683] [2022-11-26 00:12:51,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:12:51,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:12:51,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:12:51,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1036, Unknown=29, NotChecked=134, Total=1332 [2022-11-26 00:12:51,894 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 20 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 17 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:12:52,094 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse7 (@diff |c_old(#memory_$Pointer$.base)| |c_#memory_$Pointer$.base|))) (let ((.cse6 (select |c_#memory_$Pointer$.base| .cse7))) (let ((.cse0 (store |c_old(#memory_$Pointer$.base)| .cse7 .cse6))) (let ((.cse2 (@diff .cse0 |c_#memory_$Pointer$.base|))) (let ((.cse1 (select |c_#memory_$Pointer$.base| .cse2))) (let ((.cse3 (store .cse0 .cse2 .cse1))) (let ((.cse10 (select (select |c_#memory_$Pointer$.base| |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|)) (.cse4 (@diff .cse3 |c_#memory_$Pointer$.base|))) (let ((.cse5 (select |c_#memory_$Pointer$.base| .cse4)) (.cse8 (not (= .cse10 0)))) (and (or (= |c_#memory_$Pointer$.base| .cse0) (not (= (select .cse1 |c_chain_node_#in~ppnode#1.offset|) 0)) (<= (+ .cse2 1) |c_#StackHeapBarrier|)) (= |c_#memory_$Pointer$.base| (store .cse3 .cse4 .cse5)) (or (not (= (select .cse5 |c_chain_node_#in~ppnode#1.offset|) 0)) (= |c_#memory_$Pointer$.base| .cse3) (<= (+ .cse4 1) |c_#StackHeapBarrier|)) (or (not (= (select .cse6 |c_chain_node_#in~ppnode#1.offset|) 0)) (= |c_#memory_$Pointer$.base| |c_old(#memory_$Pointer$.base)|) (<= (+ .cse7 1) |c_#StackHeapBarrier|)) (exists ((v_ArrVal_309 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_310 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (not (= |chain_node_~node~0#1.base| 0)) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_309) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_310) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$.base|))) .cse8 (or (exists ((v_DerPreprocessor_3 (Array Int Int)) (v_DerPreprocessor_2 (Array Int Int))) (let ((.cse9 (select v_DerPreprocessor_3 |c_chain_node_#in~ppnode#1.offset|))) (and (= .cse9 .cse10) (not (= .cse9 0)) (not (= .cse9 |c_chain_node_#in~ppnode#1.base|)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse9 v_DerPreprocessor_2) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_3) .cse9 v_DerPreprocessor_2) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_3) .cse9) (select |c_#memory_$Pointer$.base| .cse9))))) (and (= .cse10 |c_chain_node_#in~ppnode#1.base|) .cse8))))))))))) is different from true [2022-11-26 00:12:53,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:53,766 INFO L93 Difference]: Finished difference Result 139 states and 182 transitions. [2022-11-26 00:12:53,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 00:12:53,769 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 17 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2022-11-26 00:12:53,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:53,772 INFO L225 Difference]: With dead ends: 139 [2022-11-26 00:12:53,772 INFO L226 Difference]: Without dead ends: 136 [2022-11-26 00:12:53,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=212, Invalid=1651, Unknown=41, NotChecked=258, Total=2162 [2022-11-26 00:12:53,774 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 147 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 72 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:53,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 330 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 907 Invalid, 6 Unknown, 264 Unchecked, 1.2s Time] [2022-11-26 00:12:53,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-26 00:12:53,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 94. [2022-11-26 00:12:53,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.3) internal successors, (91), 79 states have internal predecessors, (91), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:12:53,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2022-11-26 00:12:53,805 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 22 [2022-11-26 00:12:53,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:53,806 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2022-11-26 00:12:53,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 17 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:12:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2022-11-26 00:12:53,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:12:53,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:53,808 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:12:53,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:12:54,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:54,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:12:54,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:54,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1941316115, now seen corresponding path program 1 times [2022-11-26 00:12:54,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:54,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666036015] [2022-11-26 00:12:54,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:54,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:55,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:55,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666036015] [2022-11-26 00:12:55,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666036015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:55,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314479363] [2022-11-26 00:12:55,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:55,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:55,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:55,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:55,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:12:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:55,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-26 00:12:55,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:55,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:12:55,969 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-26 00:12:55,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-26 00:12:55,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:12:55,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-26 00:12:56,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 19 [2022-11-26 00:12:56,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-26 00:12:56,166 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:12:56,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-26 00:12:56,248 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-26 00:12:56,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-26 00:12:56,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:12:56,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-26 00:12:56,350 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_630 (Array Int Int)) (v_ArrVal_631 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_630) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_631) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$.base|) (not (= |chain_node_~node~0#1.base| 0)))) is different from true [2022-11-26 00:12:56,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:56,413 INFO L321 Elim1Store]: treesize reduction 61, result has 37.1 percent of original size [2022-11-26 00:12:56,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 97 [2022-11-26 00:12:56,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:12:56,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-26 00:12:56,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 36 [2022-11-26 00:12:56,585 INFO L321 Elim1Store]: treesize reduction 73, result has 19.8 percent of original size [2022-11-26 00:12:56,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 64 [2022-11-26 00:12:56,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-26 00:12:56,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-26 00:12:56,918 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:12:56,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 81 [2022-11-26 00:12:56,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:12:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-26 00:12:57,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:57,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314479363] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:57,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1095130841] [2022-11-26 00:12:57,215 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:12:57,216 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:12:57,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:12:57,216 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:12:57,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:12:57,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:57,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:57,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:57,315 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-26 00:12:57,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-26 00:12:57,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:57,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:57,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:57,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-26 00:12:57,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:57,454 INFO L321 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2022-11-26 00:12:57,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 382 treesize of output 158 [2022-11-26 00:12:57,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:57,555 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-26 00:12:57,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 26 [2022-11-26 00:12:57,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:57,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-26 00:12:57,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:57,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:12:57,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2022-11-26 00:12:57,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:57,660 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-11-26 00:12:57,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 35 [2022-11-26 00:12:57,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:12:57,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:57,759 INFO L321 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2022-11-26 00:12:57,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 386 treesize of output 190 [2022-11-26 00:12:57,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:57,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:57,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 23 [2022-11-26 00:12:57,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-26 00:12:57,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:57,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:57,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 23 [2022-11-26 00:12:57,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-26 00:12:57,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:12:57,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:57,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:57,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:57,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-26 00:12:57,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:12:57,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:12:57,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-11-26 00:12:58,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:12:58,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:12:58,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-26 00:12:58,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-11-26 00:12:58,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,322 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:12:58,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 113 [2022-11-26 00:12:58,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-26 00:12:58,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2022-11-26 00:12:58,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 56 [2022-11-26 00:12:58,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:12:58,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:12:58,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:12:58,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 66 [2022-11-26 00:12:58,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 42 [2022-11-26 00:12:58,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:12:58,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 41 [2022-11-26 00:12:58,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-26 00:12:58,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:12:58,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:12:58,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:12:58,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 41 [2022-11-26 00:12:58,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:58,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-26 00:12:58,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:12:58,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:12:59,268 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-26 00:12:59,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 492 treesize of output 503 [2022-11-26 00:12:59,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:13:00,478 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 153 for LOIs [2022-11-26 00:13:00,835 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 136 for LOIs [2022-11-26 00:13:01,470 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 140 for LOIs [2022-11-26 00:13:01,627 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:13:15,351 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1072#(or (and (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_24| Int) (v_prenex_23 (Array Int Int)) (v_prenex_22 (Array Int Int)) (|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| Int)) (and (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) (< (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) 0) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) (= (select v_prenex_23 0) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| 0)) (<= 0 |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| 0)) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0))) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| 2)) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 0) 0) (= (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) v_prenex_22) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 8) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) 0) 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| 2)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) 0) 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 1) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|))) (= |#NULL.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_24| Int) (v_DerPreprocessor_33 (Array Int Int)) (|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| Int) (v_DerPreprocessor_34 (Array Int Int)) (|v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| Int)) (and (= (select |#valid| (select v_DerPreprocessor_34 0)) 1) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select v_DerPreprocessor_34 0) v_DerPreprocessor_33) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_34) (select v_DerPreprocessor_34 0) v_DerPreprocessor_33) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_34) (select v_DerPreprocessor_34 0)) 0) 0) (= (select (store (store (store (store |#memory_$Pointer$.base| (select v_DerPreprocessor_34 0) v_DerPreprocessor_33) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_34) (select v_DerPreprocessor_34 0) v_DerPreprocessor_33) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_34) (select v_DerPreprocessor_34 0)) v_DerPreprocessor_33) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) 0) 0) (< (select v_DerPreprocessor_34 0) |#StackHeapBarrier|) (= 8 (select |#length| (select v_DerPreprocessor_34 0))) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) (= (select v_DerPreprocessor_34 0) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0) (= (select (select |#memory_$Pointer$.base| (select v_DerPreprocessor_34 0)) 4) 0) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| 0)) (<= 0 |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| 0)) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select v_DerPreprocessor_34 0) v_DerPreprocessor_33) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_34) (select v_DerPreprocessor_34 0) v_DerPreprocessor_33) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_34) (select v_DerPreprocessor_34 0)) 4) 0) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| 0)) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| 2)) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| (select v_DerPreprocessor_34 0))) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) 0) 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| 2)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) 0) 0) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) (= (select (select |#memory_$Pointer$.offset| (select v_DerPreprocessor_34 0)) 4) 0) (not (= (select v_DerPreprocessor_34 0) 0)))) (= |#NULL.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_24| Int) (v_prenex_23 (Array Int Int)) (v_prenex_22 (Array Int Int)) (|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| Int)) (and (not (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) 0) 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) (< (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) 0) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) (= (select v_prenex_23 0) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| 0)) (<= 0 |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| 0)) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0))) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| 2)) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 0) 0) (= (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_prenex_22) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_prenex_23) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) v_prenex_22) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 8) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14| 2)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_13|) 0) 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 1) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_14|))) (= |#NULL.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)))' at error location [2022-11-26 00:13:15,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:13:15,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:13:15,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2022-11-26 00:13:15,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42006057] [2022-11-26 00:13:15,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:13:15,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 00:13:15,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:15,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 00:13:15,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1151, Unknown=33, NotChecked=70, Total=1406 [2022-11-26 00:13:15,354 INFO L87 Difference]: Start difference. First operand 94 states and 120 transitions. Second operand has 19 states, 11 states have (on average 2.727272727272727) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:13:17,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:17,163 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2022-11-26 00:13:17,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:13:17,164 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 11 states have (on average 2.727272727272727) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2022-11-26 00:13:17,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:17,165 INFO L225 Difference]: With dead ends: 131 [2022-11-26 00:13:17,165 INFO L226 Difference]: Without dead ends: 128 [2022-11-26 00:13:17,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=259, Invalid=1874, Unknown=33, NotChecked=90, Total=2256 [2022-11-26 00:13:17,167 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 209 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:17,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 318 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 818 Invalid, 0 Unknown, 125 Unchecked, 1.0s Time] [2022-11-26 00:13:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-26 00:13:17,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2022-11-26 00:13:17,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.2875) internal successors, (103), 89 states have internal predecessors, (103), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:13:17,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2022-11-26 00:13:17,189 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 24 [2022-11-26 00:13:17,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:17,190 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2022-11-26 00:13:17,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 11 states have (on average 2.727272727272727) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:13:17,190 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2022-11-26 00:13:17,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-26 00:13:17,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:17,191 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:13:17,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:17,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:17,398 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:13:17,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:17,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1409252445, now seen corresponding path program 1 times [2022-11-26 00:13:17,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:13:17,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648583795] [2022-11-26 00:13:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:17,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:13:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:13:19,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:13:19,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648583795] [2022-11-26 00:13:19,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648583795] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:13:19,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139877385] [2022-11-26 00:13:19,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:19,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:19,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:19,296 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:19,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:13:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:19,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-26 00:13:19,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:19,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-26 00:13:19,654 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-26 00:13:19,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-26 00:13:19,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:13:19,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-26 00:13:19,727 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-11-26 00:13:19,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 34 [2022-11-26 00:13:19,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-11-26 00:13:19,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-26 00:13:20,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-26 00:13:20,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-11-26 00:13:20,079 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1071 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_1072 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (not (= |chain_node_~node~0#1.base| 0)) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1071) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1072) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|))))) is different from true [2022-11-26 00:13:20,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:20,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:20,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:20,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-26 00:13:20,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 15 [2022-11-26 00:13:20,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-11-26 00:13:20,267 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_1079 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (let ((.cse0 (store (store (select |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base|) 0 0) 4 0))) (store .cse0 0 (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| .cse0) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|)))) |c_chain_node_#in~ppnode#1.base| v_ArrVal_1079)))) is different from true [2022-11-26 00:13:20,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:20,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:20,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:20,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 53 [2022-11-26 00:13:20,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:20,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:20,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 54 [2022-11-26 00:13:20,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-26 00:13:20,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:20,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-11-26 00:13:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-11-26 00:13:20,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:13:22,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139877385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:13:22,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [789787933] [2022-11-26 00:13:22,838 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-26 00:13:22,838 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:13:22,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:13:22,839 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:13:22,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:13:22,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:22,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:22,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:22,935 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-26 00:13:22,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-26 00:13:22,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:22,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:22,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,038 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-26 00:13:23,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-26 00:13:23,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,159 INFO L321 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2022-11-26 00:13:23,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 386 treesize of output 162 [2022-11-26 00:13:23,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:23,224 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-26 00:13:23,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 26 [2022-11-26 00:13:23,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-26 00:13:23,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:13:23,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2022-11-26 00:13:23,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,331 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-11-26 00:13:23,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 35 [2022-11-26 00:13:23,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:13:23,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:13:23,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,432 INFO L321 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2022-11-26 00:13:23,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 386 treesize of output 190 [2022-11-26 00:13:23,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:23,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:23,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 23 [2022-11-26 00:13:23,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-26 00:13:23,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:23,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:23,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 23 [2022-11-26 00:13:23,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-26 00:13:23,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:13:23,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-26 00:13:23,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-11-26 00:13:23,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:13:23,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-26 00:13:23,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-11-26 00:13:23,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:13:23,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:13:23,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:23,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-26 00:13:24,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:13:24,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 113 [2022-11-26 00:13:24,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 60 [2022-11-26 00:13:24,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2022-11-26 00:13:24,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:13:24,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:13:24,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 42 [2022-11-26 00:13:24,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:13:24,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 66 [2022-11-26 00:13:24,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2022-11-26 00:13:24,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:13:24,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 34 [2022-11-26 00:13:24,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:13:24,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:13:24,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,506 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:13:24,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 41 [2022-11-26 00:13:24,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:24,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-26 00:13:24,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:13:24,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:13:25,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:13:25,303 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 12 for LOIs [2022-11-26 00:13:25,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:25,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:25,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:25,340 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-26 00:13:25,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 100 [2022-11-26 00:13:25,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:25,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 18 [2022-11-26 00:13:25,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:25,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-26 00:13:25,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:13:25,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:13:25,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:25,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:25,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:25,433 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-26 00:13:25,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 104 [2022-11-26 00:13:25,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:25,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 18 [2022-11-26 00:13:25,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:13:25,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:25,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-26 00:13:25,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:25,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:25,522 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-26 00:13:25,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 21 [2022-11-26 00:13:25,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:13:25,535 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 41 for LOIs [2022-11-26 00:13:25,577 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 27 for LOIs [2022-11-26 00:13:25,582 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:13:29,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1611#(and (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_27| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_27|) 0) 0) (<= 0 |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_27|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_27|) 0) 0))) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_27| Int)) (and (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_27|) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_27|) 0))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:13:29,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:13:29,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:13:29,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2022-11-26 00:13:29,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388729099] [2022-11-26 00:13:29,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:13:29,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:13:29,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:29,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:13:29,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1193, Unknown=11, NotChecked=142, Total=1482 [2022-11-26 00:13:29,039 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand has 23 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 20 states have internal predecessors, (34), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:13:31,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:31,189 INFO L93 Difference]: Finished difference Result 162 states and 209 transitions. [2022-11-26 00:13:31,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:13:31,190 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 20 states have internal predecessors, (34), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 27 [2022-11-26 00:13:31,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:31,192 INFO L225 Difference]: With dead ends: 162 [2022-11-26 00:13:31,192 INFO L226 Difference]: Without dead ends: 159 [2022-11-26 00:13:31,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=238, Invalid=2015, Unknown=11, NotChecked=186, Total=2450 [2022-11-26 00:13:31,194 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 184 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:31,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 497 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1171 Invalid, 0 Unknown, 342 Unchecked, 1.3s Time] [2022-11-26 00:13:31,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-26 00:13:31,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 85. [2022-11-26 00:13:31,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 72 states have internal predecessors, (81), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:13:31,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 106 transitions. [2022-11-26 00:13:31,215 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 106 transitions. Word has length 27 [2022-11-26 00:13:31,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:31,215 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 106 transitions. [2022-11-26 00:13:31,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 20 states have internal predecessors, (34), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:13:31,216 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 106 transitions. [2022-11-26 00:13:31,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:13:31,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:31,217 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:13:31,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:31,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:31,423 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:13:31,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:31,424 INFO L85 PathProgramCache]: Analyzing trace with hash 128159807, now seen corresponding path program 1 times [2022-11-26 00:13:31,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:13:31,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457316723] [2022-11-26 00:13:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:31,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:13:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:13:31,501 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 00:13:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:13:31,570 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-26 00:13:31,570 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 00:13:31,571 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-26 00:13:31,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:13:31,578 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-26 00:13:31,582 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:13:31,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:13:31 BoogieIcfgContainer [2022-11-26 00:13:31,614 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:13:31,614 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:13:31,615 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:13:31,615 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:13:31,615 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:12:25" (3/4) ... [2022-11-26 00:13:31,617 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-26 00:13:31,660 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 00:13:31,660 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:13:31,661 INFO L158 Benchmark]: Toolchain (without parser) took 67833.02ms. Allocated memory was 151.0MB in the beginning and 446.7MB in the end (delta: 295.7MB). Free memory was 110.5MB in the beginning and 171.9MB in the end (delta: -61.4MB). Peak memory consumption was 232.7MB. Max. memory is 16.1GB. [2022-11-26 00:13:31,661 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 109.1MB. Free memory is still 80.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:13:31,661 INFO L158 Benchmark]: CACSL2BoogieTranslator took 587.38ms. Allocated memory is still 151.0MB. Free memory was 110.1MB in the beginning and 114.5MB in the end (delta: -4.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:13:31,662 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.22ms. Allocated memory is still 151.0MB. Free memory was 114.5MB in the beginning and 112.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:13:31,662 INFO L158 Benchmark]: Boogie Preprocessor took 41.78ms. Allocated memory is still 151.0MB. Free memory was 112.4MB in the beginning and 109.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:13:31,662 INFO L158 Benchmark]: RCFGBuilder took 936.99ms. Allocated memory is still 151.0MB. Free memory was 109.8MB in the beginning and 79.2MB in the end (delta: 30.6MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2022-11-26 00:13:31,663 INFO L158 Benchmark]: TraceAbstraction took 66156.11ms. Allocated memory was 151.0MB in the beginning and 446.7MB in the end (delta: 295.7MB). Free memory was 78.7MB in the beginning and 175.0MB in the end (delta: -96.3MB). Peak memory consumption was 201.9MB. Max. memory is 16.1GB. [2022-11-26 00:13:31,663 INFO L158 Benchmark]: Witness Printer took 45.85ms. Allocated memory is still 446.7MB. Free memory was 175.0MB in the beginning and 171.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:13:31,665 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 109.1MB. Free memory is still 80.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 587.38ms. Allocated memory is still 151.0MB. Free memory was 110.1MB in the beginning and 114.5MB in the end (delta: -4.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.22ms. Allocated memory is still 151.0MB. Free memory was 114.5MB in the beginning and 112.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.78ms. Allocated memory is still 151.0MB. Free memory was 112.4MB in the beginning and 109.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 936.99ms. Allocated memory is still 151.0MB. Free memory was 109.8MB in the beginning and 79.2MB in the end (delta: 30.6MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * TraceAbstraction took 66156.11ms. Allocated memory was 151.0MB in the beginning and 446.7MB in the end (delta: 295.7MB). Free memory was 78.7MB in the beginning and 175.0MB in the end (delta: -96.3MB). Peak memory consumption was 201.9MB. Max. memory is 16.1GB. * Witness Printer took 45.85ms. Allocated memory is still 446.7MB. Free memory was 175.0MB in the beginning and 171.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 565]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L639] const struct node *p1, *p2; [L640] CALL, EXPR create_sll(&p1, &p2) [L588] struct node *list = ((void *)0); VAL [list={5:0}, pp1={7:0}, pp1={7:0}, pp2={6:0}, pp2={6:0}] [L590] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node [L590] RET chain_node(&list) VAL [list={5:0}, pp1={7:0}, pp1={7:0}, pp2={6:0}, pp2={6:0}] [L591] COND FALSE !(__VERIFIER_nondet_int()) [L592] EXPR \read(*list) [L592] *pp2 = list [L593] COND FALSE !(__VERIFIER_nondet_int()) [L595] EXPR \read(*list) [L595] *pp1 = list [L597] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node [L597] RET chain_node(&list) VAL [list={5:0}, pp1={7:0}, pp1={7:0}, pp2={6:0}, pp2={6:0}] [L598] COND FALSE !(__VERIFIER_nondet_int()) [L599] EXPR \read(*list) [L599] return list; [L588] struct node *list = ((void *)0); [L599] return list; [L640] RET, EXPR create_sll(&p1, &p2) [L640] struct node *list = create_sll(&p1, &p2); [L642] EXPR \read(*p1) [L642] EXPR \read(*p2) VAL [\read(*p1)={-1:0}, \read(*p2)={-1:0}, list={3:0}, p1={7:0}, p2={6:0}] [L642] CALL check_seq_next(p1, p2) VAL [beg={-1:0}, end={-1:0}] [L626] COND FALSE !(!(beg)) VAL [beg={-1:0}, beg={-1:0}, end={-1:0}, end={-1:0}] [L627] COND FALSE !(!(end)) VAL [beg={-1:0}, beg={-1:0}, end={-1:0}, end={-1:0}] [L628] EXPR beg->next [L628] beg = beg->next [L628] COND TRUE end != beg VAL [beg={0:0}, beg={-1:0}, end={-1:0}, end={-1:0}] [L629] COND TRUE !(beg) VAL [beg={0:0}, beg={-1:0}, end={-1:0}, end={-1:0}] [L629] CALL fail() [L565] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 78 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 66.0s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 556 SdHoareTripleChecker+Valid, 3.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 540 mSDsluCounter, 1231 SdHoareTripleChecker+Invalid, 3.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 731 IncrementalHoareTripleChecker+Unchecked, 995 mSDsCounter, 254 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2908 IncrementalHoareTripleChecker+Invalid, 3899 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 254 mSolverCounterUnsat, 236 mSDtfsCounter, 2908 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 254 GetRequests, 110 SyntacticMatches, 5 SemanticMatches, 139 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 36.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=3, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 139 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 13.6s InterpolantComputationTime, 187 NumberOfCodeBlocks, 187 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 152 ConstructedInterpolants, 20 QuantifiedInterpolants, 4404 SizeOfPredicates, 83 NumberOfNonLiveVariables, 1437 ConjunctsInSsa, 300 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 11/26 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-26 00:13:31,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff9a7b51-bb40-4ca4-9be5-c3b7665bd75c/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE