./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bae9bfc842bb010963d083e19e9498cfd3af182f91f0b8fa56907786a4d462dd --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:28:22,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:28:22,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:28:22,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:28:22,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:28:22,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:28:22,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:28:22,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:28:22,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:28:22,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:28:22,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:28:22,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:28:22,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:28:22,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:28:22,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:28:22,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:28:22,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:28:22,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:28:22,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:28:22,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:28:22,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:28:22,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:28:22,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:28:22,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:28:22,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:28:22,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:28:22,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:28:22,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:28:22,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:28:22,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:28:22,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:28:22,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:28:22,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:28:22,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:28:22,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:28:22,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:28:22,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:28:22,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:28:22,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:28:22,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:28:22,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:28:22,796 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:28:22,820 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:28:22,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:28:22,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:28:22,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:28:22,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:28:22,822 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:28:22,822 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:28:22,822 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:28:22,823 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:28:22,823 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:28:22,823 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:28:22,823 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:28:22,823 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:28:22,823 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:28:22,824 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:28:22,824 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:28:22,824 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:28:22,824 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:28:22,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:28:22,825 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:28:22,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:28:22,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:28:22,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:28:22,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:28:22,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:28:22,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:28:22,826 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:28:22,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:28:22,827 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:28:22,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:28:22,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:28:22,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:28:22,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:28:22,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:28:22,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:28:22,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:28:22,828 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:28:22,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:28:22,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:28:22,829 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:28:22,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:28:22,829 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bae9bfc842bb010963d083e19e9498cfd3af182f91f0b8fa56907786a4d462dd [2021-11-25 18:28:23,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:28:23,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:28:23,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:28:23,137 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:28:23,138 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:28:23,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/list-simple/sll2n_remove_all.i [2021-11-25 18:28:23,212 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/data/059f7ff27/18e1c542b3194648824425e41a596b27/FLAG0899ef7d7 [2021-11-25 18:28:23,690 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:28:23,691 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/sv-benchmarks/c/list-simple/sll2n_remove_all.i [2021-11-25 18:28:23,710 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/data/059f7ff27/18e1c542b3194648824425e41a596b27/FLAG0899ef7d7 [2021-11-25 18:28:23,996 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/data/059f7ff27/18e1c542b3194648824425e41a596b27 [2021-11-25 18:28:23,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:28:24,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:28:24,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:28:24,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:28:24,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:28:24,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:28:23" (1/1) ... [2021-11-25 18:28:24,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b841f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:24, skipping insertion in model container [2021-11-25 18:28:24,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:28:23" (1/1) ... [2021-11-25 18:28:24,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:28:24,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:28:24,350 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2021-11-25 18:28:24,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:28:24,361 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:28:24,401 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2021-11-25 18:28:24,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:28:24,432 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:28:24,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:24 WrapperNode [2021-11-25 18:28:24,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:28:24,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:28:24,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:28:24,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:28:24,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:24" (1/1) ... [2021-11-25 18:28:24,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:24" (1/1) ... [2021-11-25 18:28:24,477 INFO L137 Inliner]: procedures = 126, calls = 25, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 83 [2021-11-25 18:28:24,477 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:28:24,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:28:24,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:28:24,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:28:24,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:24" (1/1) ... [2021-11-25 18:28:24,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:24" (1/1) ... [2021-11-25 18:28:24,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:24" (1/1) ... [2021-11-25 18:28:24,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:24" (1/1) ... [2021-11-25 18:28:24,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:24" (1/1) ... [2021-11-25 18:28:24,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:24" (1/1) ... [2021-11-25 18:28:24,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:24" (1/1) ... [2021-11-25 18:28:24,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:28:24,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:28:24,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:28:24,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:28:24,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:24" (1/1) ... [2021-11-25 18:28:24,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:28:24,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:28:24,569 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:28:24,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:28:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:28:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:28:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:28:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:28:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:28:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:28:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:28:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:28:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:28:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:28:24,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:28:24,743 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:28:24,744 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:28:24,951 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:28:25,007 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:28:25,007 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:28:25,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:28:25 BoogieIcfgContainer [2021-11-25 18:28:25,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:28:25,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:28:25,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:28:25,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:28:25,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:28:23" (1/3) ... [2021-11-25 18:28:25,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74253224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:28:25, skipping insertion in model container [2021-11-25 18:28:25,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:24" (2/3) ... [2021-11-25 18:28:25,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74253224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:28:25, skipping insertion in model container [2021-11-25 18:28:25,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:28:25" (3/3) ... [2021-11-25 18:28:25,027 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all.i [2021-11-25 18:28:25,036 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:28:25,036 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:28:25,101 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:28:25,107 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:28:25,108 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:28:25,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:28:25,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:28:25,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:28:25,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:28:25,150 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:28:25,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:28:25,156 INFO L85 PathProgramCache]: Analyzing trace with hash 87054654, now seen corresponding path program 1 times [2021-11-25 18:28:25,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:28:25,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576429584] [2021-11-25 18:28:25,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:25,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:28:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:28:25,333 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:28:25,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576429584] [2021-11-25 18:28:25,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576429584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:28:25,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:28:25,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:28:25,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772055527] [2021-11-25 18:28:25,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:28:25,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:28:25,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:28:25,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:28:25,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:28:25,372 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:28:25,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:28:25,410 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2021-11-25 18:28:25,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:28:25,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-25 18:28:25,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:28:25,420 INFO L225 Difference]: With dead ends: 19 [2021-11-25 18:28:25,420 INFO L226 Difference]: Without dead ends: 9 [2021-11-25 18:28:25,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:28:25,427 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:28:25,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:28:25,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-25 18:28:25,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2021-11-25 18:28:25,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:28:25,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-25 18:28:25,458 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2021-11-25 18:28:25,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:28:25,459 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-25 18:28:25,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:28:25,459 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-25 18:28:25,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:28:25,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:28:25,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:28:25,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:28:25,461 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:28:25,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:28:25,462 INFO L85 PathProgramCache]: Analyzing trace with hash 392524083, now seen corresponding path program 1 times [2021-11-25 18:28:25,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:28:25,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568024616] [2021-11-25 18:28:25,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:25,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:28:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:28:25,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:28:25,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568024616] [2021-11-25 18:28:25,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568024616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:28:25,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846069868] [2021-11-25 18:28:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:25,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:25,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:28:25,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:28:25,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:28:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:25,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:28:25,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:28:25,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:28:25,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:28:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:28:25,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846069868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:28:25,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2086254626] [2021-11-25 18:28:25,748 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:28:25,748 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:28:25,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:28:25,758 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:28:25,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:28:25,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:25,876 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:28:25,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:28:25,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:25,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:28:25,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:25,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:26,042 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:28:26,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 18:28:26,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:26,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:26,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 18:28:26,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:26,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 18:28:26,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:26,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:28:26,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:26,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:26,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-25 18:28:26,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:26,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:26,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:26,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 28 [2021-11-25 18:28:26,547 INFO L354 Elim1Store]: treesize reduction 124, result has 24.8 percent of original size [2021-11-25 18:28:26,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 280 treesize of output 304 [2021-11-25 18:28:26,649 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-25 18:28:26,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 273 treesize of output 282 [2021-11-25 18:28:27,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:27,178 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:28:27,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 276 treesize of output 258 [2021-11-25 18:28:27,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:27,317 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-25 18:28:27,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 277 treesize of output 286 [2021-11-25 18:28:27,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:27,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:27,377 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 18:28:27,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 286 treesize of output 263 [2021-11-25 18:28:27,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:27,471 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-25 18:28:27,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 267 treesize of output 276 [2021-11-25 18:28:27,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:27,521 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-25 18:28:27,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-11-25 18:28:27,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:27,585 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-25 18:28:27,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-11-25 18:28:27,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:28:27,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:28:27,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:27,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:27,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2021-11-25 18:28:27,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:27,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:27,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-25 18:28:27,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:27,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:27,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:27,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-25 18:28:28,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:28:28,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:28:28,030 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:28:28,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2086254626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:28:28,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:28:28,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 7 [2021-11-25 18:28:28,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86991037] [2021-11-25 18:28:28,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:28:28,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:28:28,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:28:28,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:28:28,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:28:28,349 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:28:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:28:28,392 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-11-25 18:28:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:28:28,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 18:28:28,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:28:28,393 INFO L225 Difference]: With dead ends: 12 [2021-11-25 18:28:28,394 INFO L226 Difference]: Without dead ends: 9 [2021-11-25 18:28:28,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:28:28,396 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:28:28,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:28:28,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-25 18:28:28,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-25 18:28:28,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:28:28,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-25 18:28:28,404 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-11-25 18:28:28,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:28:28,405 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-25 18:28:28,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:28:28,405 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-25 18:28:28,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:28:28,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:28:28,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:28:28,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:28:28,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:28,632 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:28:28,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:28:28,632 INFO L85 PathProgramCache]: Analyzing trace with hash -716756293, now seen corresponding path program 1 times [2021-11-25 18:28:28,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:28:28,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313150172] [2021-11-25 18:28:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:28,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:28:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:28:28,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:28:28,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313150172] [2021-11-25 18:28:28,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313150172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:28:28,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267966101] [2021-11-25 18:28:28,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:28,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:28,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:28:28,752 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:28:28,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:28:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:28,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:28:28,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:28:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:28:28,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:28:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:28:28,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267966101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:28:28,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [400115513] [2021-11-25 18:28:28,922 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:28:28,922 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:28:28,923 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:28:28,923 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:28:28,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:28:28,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:28,961 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:28:28,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 18:28:28,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:28,985 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:28:28,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:28:29,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:29,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:29,034 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-25 18:28:29,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2021-11-25 18:28:29,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:29,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:29,081 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:28:29,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 18:28:29,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:29,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:29,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:29,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 28 [2021-11-25 18:28:29,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:29,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 18:28:29,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:29,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:28:29,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:29,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:29,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-25 18:28:29,352 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-11-25 18:28:29,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 275 treesize of output 284 [2021-11-25 18:28:29,460 INFO L354 Elim1Store]: treesize reduction 132, result has 20.0 percent of original size [2021-11-25 18:28:29,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 278 treesize of output 294 [2021-11-25 18:28:29,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:29,900 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-25 18:28:29,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 277 treesize of output 286 [2021-11-25 18:28:29,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:30,038 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-25 18:28:30,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 271 treesize of output 280 [2021-11-25 18:28:30,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:30,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:30,098 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:28:30,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 264 treesize of output 246 [2021-11-25 18:28:30,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:30,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:30,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:30,168 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:28:30,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 280 treesize of output 257 [2021-11-25 18:28:30,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:30,238 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-25 18:28:30,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-11-25 18:28:30,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:30,291 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-25 18:28:30,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-11-25 18:28:30,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:28:30,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:28:30,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:30,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:30,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:30,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-25 18:28:30,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:30,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:30,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-25 18:28:30,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:30,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:30,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2021-11-25 18:28:30,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:28:30,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:30,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:28:30,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 49 [2021-11-25 18:28:30,725 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-25 18:28:30,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 35 [2021-11-25 18:28:30,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:28:30,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:28:30,830 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-25 18:28:30,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 56 [2021-11-25 18:28:30,859 INFO L354 Elim1Store]: treesize reduction 30, result has 44.4 percent of original size [2021-11-25 18:28:30,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 66 [2021-11-25 18:28:30,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:28:31,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:28:31,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:28:31,033 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:28:31,564 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '185#(and (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0))) (< |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:28:31,564 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:28:31,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:28:31,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2021-11-25 18:28:31,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319970550] [2021-11-25 18:28:31,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:28:31,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:28:31,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:28:31,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:28:31,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:28:31,567 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:28:31,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:28:31,596 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-11-25 18:28:31,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:28:31,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 18:28:31,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:28:31,598 INFO L225 Difference]: With dead ends: 16 [2021-11-25 18:28:31,598 INFO L226 Difference]: Without dead ends: 11 [2021-11-25 18:28:31,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:28:31,599 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:28:31,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:28:31,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-25 18:28:31,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-25 18:28:31,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:28:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-25 18:28:31,605 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2021-11-25 18:28:31,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:28:31,605 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-25 18:28:31,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:28:31,605 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-25 18:28:31,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:28:31,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:28:31,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:28:31,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:28:31,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:31,807 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:28:31,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:28:31,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1512697178, now seen corresponding path program 2 times [2021-11-25 18:28:31,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:28:31,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179015652] [2021-11-25 18:28:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:31,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:28:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:28:31,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:28:31,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179015652] [2021-11-25 18:28:31,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179015652] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:28:31,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931739716] [2021-11-25 18:28:31,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:28:31,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:31,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:28:31,960 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:28:31,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:28:32,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:28:32,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:28:32,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:28:32,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:28:32,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:28:32,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:28:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:28:32,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931739716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:28:32,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1992841543] [2021-11-25 18:28:32,108 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:28:32,108 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:28:32,109 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:28:32,109 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:28:32,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:28:32,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:32,145 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:28:32,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:28:32,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:32,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:28:32,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:32,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:32,204 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-25 18:28:32,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2021-11-25 18:28:32,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:32,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:32,245 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:28:32,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 18:28:32,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:32,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:32,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:32,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 28 [2021-11-25 18:28:32,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:32,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 18:28:32,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:32,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:28:32,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:32,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-25 18:28:32,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:32,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:28:32,543 INFO L354 Elim1Store]: treesize reduction 124, result has 24.8 percent of original size [2021-11-25 18:28:32,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 280 treesize of output 304 [2021-11-25 18:28:32,597 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-25 18:28:32,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 273 treesize of output 282 [2021-11-25 18:28:32,903 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:28:32,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 276 treesize of output 268 [2021-11-25 18:28:32,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:33,044 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-25 18:28:33,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 273 treesize of output 282 [2021-11-25 18:28:33,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:33,138 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-25 18:28:33,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 267 treesize of output 276 [2021-11-25 18:28:33,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:33,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:33,221 INFO L354 Elim1Store]: treesize reduction 74, result has 24.5 percent of original size [2021-11-25 18:28:33,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 293 treesize of output 283 [2021-11-25 18:28:33,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:33,283 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-25 18:28:33,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-11-25 18:28:33,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:33,340 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-25 18:28:33,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-11-25 18:28:33,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:28:33,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:28:33,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:33,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:33,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-25 18:28:33,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:33,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:33,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:33,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2021-11-25 18:28:33,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:33,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:28:33,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 7 [2021-11-25 18:28:33,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:28:33,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:33,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:28:33,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 49 [2021-11-25 18:28:33,891 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-25 18:28:33,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 35 [2021-11-25 18:28:33,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:28:33,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:28:33,987 INFO L354 Elim1Store]: treesize reduction 42, result has 43.2 percent of original size [2021-11-25 18:28:33,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 64 [2021-11-25 18:28:34,022 INFO L354 Elim1Store]: treesize reduction 24, result has 45.5 percent of original size [2021-11-25 18:28:34,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 58 [2021-11-25 18:28:34,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:28:34,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:28:34,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:28:34,175 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:28:34,701 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '296#(and (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0))) (< |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:28:34,702 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:28:34,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:28:34,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-11-25 18:28:34,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547817911] [2021-11-25 18:28:34,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:28:34,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:28:34,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:28:34,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:28:34,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:28:34,704 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:28:34,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:28:34,740 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-11-25 18:28:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:28:34,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 18:28:34,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:28:34,741 INFO L225 Difference]: With dead ends: 15 [2021-11-25 18:28:34,742 INFO L226 Difference]: Without dead ends: 12 [2021-11-25 18:28:34,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:28:34,743 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:28:34,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 6 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:28:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-25 18:28:34,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-25 18:28:34,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:28:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-25 18:28:34,748 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2021-11-25 18:28:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:28:34,748 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-25 18:28:34,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:28:34,748 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-25 18:28:34,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:28:34,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:28:34,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 18:28:34,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:28:34,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:34,950 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:28:34,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:28:34,950 INFO L85 PathProgramCache]: Analyzing trace with hash 350926760, now seen corresponding path program 3 times [2021-11-25 18:28:34,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:28:34,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389313834] [2021-11-25 18:28:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:34,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:28:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:28:35,270 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:28:35,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389313834] [2021-11-25 18:28:35,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389313834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:28:35,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388960480] [2021-11-25 18:28:35,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:28:35,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:35,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:28:35,271 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:28:35,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f247b-2e53-4b33-bfa2-e0491b039860/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:28:35,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:28:35,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:28:35,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-25 18:28:35,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:28:35,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:28:35,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:28:35,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:28:35,906 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:28:35,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:28:35,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-11-25 18:28:35,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-11-25 18:28:35,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-11-25 18:28:35,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:28:36,152 INFO L354 Elim1Store]: treesize reduction 99, result has 26.7 percent of original size [2021-11-25 18:28:36,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 166 treesize of output 116 [2021-11-25 18:28:36,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:36,170 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-25 18:28:36,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 76 [2021-11-25 18:28:36,390 INFO L354 Elim1Store]: treesize reduction 114, result has 15.6 percent of original size [2021-11-25 18:28:36,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 113 treesize of output 80 [2021-11-25 18:28:36,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:36,409 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-25 18:28:36,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 50 [2021-11-25 18:28:36,562 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-25 18:28:36,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 35 [2021-11-25 18:28:36,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:36,575 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:28:36,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 15 [2021-11-25 18:28:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:28:36,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:28:36,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:28:36,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 341 treesize of output 212 [2021-11-25 18:28:36,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:28:36,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 16 treesize of output 15 [2021-11-25 18:28:36,954 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_3 (Array Int Int)) (v_DerPreprocessor_15 (Array Int Int))) (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_3)) (.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_DerPreprocessor_15))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse7 (select .cse6 |c_ULTIMATE.start_main_~#s~0#1.base|))) (let ((.cse8 (select .cse7 |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse0 (+ (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (or (not (= (select v_DerPreprocessor_15 .cse0) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (let ((.cse3 (select (select .cse1 .cse8) .cse0))) (let ((.cse4 (select (select .cse6 .cse8) .cse0)) (.cse5 (+ 4 .cse3))) (and (= (select (select (store .cse1 |c_ULTIMATE.start_main_~#s~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~#s~0#1.offset| .cse3)) .cse4) .cse5) 0) (= (select (select (store .cse6 |c_ULTIMATE.start_main_~#s~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#s~0#1.offset| .cse4)) .cse4) .cse5) 0)))) (not (= .cse8 |c_ULTIMATE.start_node_create_~temp~0#1.base|)) (not (= (select v_arrayElimArr_3 .cse0) |c_ULTIMATE.start_sll_create_~head~0#1.base|))))))) is different from false [2021-11-25 18:28:37,187 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_3 (Array Int Int)) (v_DerPreprocessor_15 (Array Int Int)) (|v_ULTIMATE.start_node_create_~temp~0#1.base_19| Int)) (let ((.cse2 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_node_create_~temp~0#1.base_19| v_arrayElimArr_3)) (.cse6 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_node_create_~temp~0#1.base_19| v_DerPreprocessor_15))) (let ((.cse7 (select .cse6 |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse3 (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|))) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse0 (+ (select .cse7 |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (or (not (= (select v_DerPreprocessor_15 .cse0) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (not (= (select |c_#valid| |v_ULTIMATE.start_node_create_~temp~0#1.base_19|) 0)) (not (= |v_ULTIMATE.start_node_create_~temp~0#1.base_19| .cse1)) (not (= (select v_arrayElimArr_3 .cse0) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (let ((.cse8 (select (select .cse6 .cse1) .cse0))) (let ((.cse4 (select (select .cse2 .cse1) .cse0)) (.cse5 (+ .cse8 4))) (and (= (select (select (store .cse2 |c_ULTIMATE.start_main_~#s~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#s~0#1.offset| .cse4)) .cse4) .cse5) 0) (= (select (select (store .cse6 |c_ULTIMATE.start_main_~#s~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#s~0#1.offset| .cse8)) .cse4) .cse5) 0))))))))) is different from false [2021-11-25 18:28:37,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:28:37,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1160 treesize of output 768 [2021-11-25 18:28:37,522 INFO L354 Elim1Store]: treesize reduction 298, result has 65.3 percent of original size [2021-11-25 18:28:37,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 6932 treesize of output 5697 [2021-11-25 18:28:37,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:28:37,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 5887 treesize of output 2095 [2021-11-25 18:28:37,890 INFO L354 Elim1Store]: treesize reduction 8, result has 95.0 percent of original size [2021-11-25 18:28:37,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 6000 treesize of output 5290 [2021-11-25 18:28:38,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:28:38,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 5058 treesize of output 4902 [2021-11-25 18:28:39,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:28:39,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 7230 treesize of output 6858 [2021-11-25 18:28:40,685 INFO L354 Elim1Store]: treesize reduction 20, result has 92.5 percent of original size [2021-11-25 18:28:40,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 7424 treesize of output 6356