./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test25-1.c --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_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/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_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test25-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/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_275a8390-ab0b-4e09-9668-a2f02afe48ba/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 de251549242251e9f54823879039d01198e32edde0d5daa52ae9e52ec83fdcc8 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:15:26,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:15:26,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:15:26,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:15:26,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:15:26,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:15:26,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:15:26,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:15:26,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:15:26,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:15:26,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:15:26,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:15:26,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:15:26,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:15:26,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:15:26,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:15:26,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:15:26,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:15:26,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:15:26,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:15:26,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:15:26,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:15:26,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:15:26,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:15:26,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:15:26,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:15:26,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:15:26,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:15:26,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:15:26,652 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:15:26,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:15:26,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:15:26,655 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:15:26,656 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:15:26,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:15:26,658 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:15:26,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:15:26,659 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:15:26,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:15:26,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:15:26,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:15:26,662 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:15:26,705 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:15:26,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:15:26,707 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:15:26,707 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:15:26,708 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:15:26,713 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:15:26,714 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:15:26,714 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:15:26,714 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:15:26,715 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:15:26,715 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:15:26,715 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:15:26,715 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:15:26,715 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:15:26,716 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:15:26,716 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:15:26,716 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:15:26,716 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:15:26,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:15:26,718 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:15:26,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:15:26,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:15:26,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:15:26,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:15:26,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:15:26,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:15:26,719 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:15:26,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:15:26,720 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:15:26,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:15:26,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:15:26,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:15:26,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:15:26,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:15:26,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:15:26,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:15:26,722 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:15:26,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:15:26,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:15:26,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:15:26,722 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:15:26,723 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_275a8390-ab0b-4e09-9668-a2f02afe48ba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de251549242251e9f54823879039d01198e32edde0d5daa52ae9e52ec83fdcc8 [2021-11-25 18:15:26,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:15:27,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:15:27,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:15:27,016 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:15:27,016 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:15:27,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-regression/test25-1.c [2021-11-25 18:15:27,075 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/data/bd1ceca51/924e00ce55d9402da0a8b52f521ce300/FLAG2b2f800d4 [2021-11-25 18:15:27,521 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:15:27,522 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/sv-benchmarks/c/ldv-regression/test25-1.c [2021-11-25 18:15:27,531 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/data/bd1ceca51/924e00ce55d9402da0a8b52f521ce300/FLAG2b2f800d4 [2021-11-25 18:15:27,887 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/data/bd1ceca51/924e00ce55d9402da0a8b52f521ce300 [2021-11-25 18:15:27,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:15:27,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:15:27,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:15:27,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:15:27,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:15:27,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:15:27" (1/1) ... [2021-11-25 18:15:27,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70632815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:27, skipping insertion in model container [2021-11-25 18:15:27,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:15:27" (1/1) ... [2021-11-25 18:15:27,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:15:27,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:15:28,149 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_275a8390-ab0b-4e09-9668-a2f02afe48ba/sv-benchmarks/c/ldv-regression/test25-1.c[936,949] [2021-11-25 18:15:28,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:15:28,162 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:15:28,193 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_275a8390-ab0b-4e09-9668-a2f02afe48ba/sv-benchmarks/c/ldv-regression/test25-1.c[936,949] [2021-11-25 18:15:28,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:15:28,213 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:15:28,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:28 WrapperNode [2021-11-25 18:15:28,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:15:28,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:15:28,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:15:28,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:15:28,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:28" (1/1) ... [2021-11-25 18:15:28,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:28" (1/1) ... [2021-11-25 18:15:28,272 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2021-11-25 18:15:28,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:15:28,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:15:28,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:15:28,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:15:28,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:28" (1/1) ... [2021-11-25 18:15:28,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:28" (1/1) ... [2021-11-25 18:15:28,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:28" (1/1) ... [2021-11-25 18:15:28,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:28" (1/1) ... [2021-11-25 18:15:28,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:28" (1/1) ... [2021-11-25 18:15:28,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:28" (1/1) ... [2021-11-25 18:15:28,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:28" (1/1) ... [2021-11-25 18:15:28,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:15:28,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:15:28,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:15:28,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:15:28,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:28" (1/1) ... [2021-11-25 18:15:28,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:15:28,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:15:28,363 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:15:28,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:15:28,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:15:28,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:15:28,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:15:28,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:15:28,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:15:28,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:15:28,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:15:28,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:15:28,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:15:28,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:15:28,511 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:15:28,512 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:15:28,689 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:15:28,711 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:15:28,711 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:15:28,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:15:28 BoogieIcfgContainer [2021-11-25 18:15:28,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:15:28,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:15:28,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:15:28,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:15:28,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:15:27" (1/3) ... [2021-11-25 18:15:28,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2765b1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:15:28, skipping insertion in model container [2021-11-25 18:15:28,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:28" (2/3) ... [2021-11-25 18:15:28,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2765b1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:15:28, skipping insertion in model container [2021-11-25 18:15:28,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:15:28" (3/3) ... [2021-11-25 18:15:28,722 INFO L111 eAbstractionObserver]: Analyzing ICFG test25-1.c [2021-11-25 18:15:28,727 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:15:28,727 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:15:28,791 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:15:28,798 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 18:15:28,799 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:15:28,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:15:28,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:15:28,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:28,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:15:28,853 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:15:28,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:28,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1557299960, now seen corresponding path program 1 times [2021-11-25 18:15:28,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:15:28,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356887807] [2021-11-25 18:15:28,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:28,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:15:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:29,053 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 18:15:29,054 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:15:29,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356887807] [2021-11-25 18:15:29,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356887807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:15:29,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:15:29,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:15:29,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727922976] [2021-11-25 18:15:29,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:15:29,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:15:29,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:15:29,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:15:29,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:15:29,095 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:15:29,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:15:29,126 INFO L93 Difference]: Finished difference Result 25 states and 35 transitions. [2021-11-25 18:15:29,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:15:29,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 18:15:29,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:15:29,137 INFO L225 Difference]: With dead ends: 25 [2021-11-25 18:15:29,137 INFO L226 Difference]: Without dead ends: 11 [2021-11-25 18:15:29,140 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 18:15:29,145 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:15:29,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:15:29,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-25 18:15:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-25 18:15:29,175 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 18:15:29,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-25 18:15:29,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2021-11-25 18:15:29,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:15:29,178 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-25 18:15:29,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:15:29,179 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-25 18:15:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:15:29,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:29,180 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:15:29,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:15:29,180 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:15:29,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:29,182 INFO L85 PathProgramCache]: Analyzing trace with hash 655222785, now seen corresponding path program 1 times [2021-11-25 18:15:29,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:15:29,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355686337] [2021-11-25 18:15:29,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:29,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:15:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:29,249 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 18:15:29,250 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:15:29,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355686337] [2021-11-25 18:15:29,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355686337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:15:29,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207385264] [2021-11-25 18:15:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:29,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:15:29,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:15:29,253 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:15:29,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:15:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:29,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:15:29,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:15:29,467 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 18:15:29,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:15:29,521 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 18:15:29,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207385264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:15:29,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1177456426] [2021-11-25 18:15:29,557 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 18:15:29,558 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:15:29,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:15:29,572 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:15:29,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:15:29,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:29,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:29,876 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:15:29,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:15:29,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:29,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:29,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 35 [2021-11-25 18:15:30,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:30,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 18:15:30,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:30,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:30,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 37 [2021-11-25 18:15:30,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:30,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 18:15:30,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:30,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:30,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:30,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:30,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:30,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:30,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:30,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:30,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:30,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:30,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:15:30,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:30,445 INFO L354 Elim1Store]: treesize reduction 88, result has 29.0 percent of original size [2021-11-25 18:15:30,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 306 treesize of output 312 [2021-11-25 18:15:30,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:30,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:30,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:30,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:30,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:30,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 18:15:30,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:30,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:30,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:15:30,961 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 11 [2021-11-25 18:15:30,971 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 18:15:31,015 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:15:31,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1177456426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:15:31,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:15:31,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 11 [2021-11-25 18:15:31,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728645692] [2021-11-25 18:15:31,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:15:31,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:15:31,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:15:31,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:15:31,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:15:31,269 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 18:15:31,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:15:31,343 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-11-25 18:15:31,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:15:31,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) Word has length 10 [2021-11-25 18:15:31,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:15:31,345 INFO L225 Difference]: With dead ends: 17 [2021-11-25 18:15:31,345 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 18:15:31,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:15:31,347 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:15:31,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:15:31,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 18:15:31,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-25 18:15:31,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:15:31,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-25 18:15:31,352 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2021-11-25 18:15:31,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:15:31,352 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-25 18:15:31,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 18:15:31,353 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-25 18:15:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 18:15:31,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:31,353 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:15:31,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:15:31,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:15:31,566 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:15:31,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:31,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1661865060, now seen corresponding path program 1 times [2021-11-25 18:15:31,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:15:31,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502712985] [2021-11-25 18:15:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:31,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:15:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:15:31,663 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:15:31,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502712985] [2021-11-25 18:15:31,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502712985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:15:31,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836834620] [2021-11-25 18:15:31,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:31,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:15:31,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:15:31,675 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:15:31,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:15:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:31,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:15:31,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:15:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:15:31,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:15:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:15:31,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836834620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:15:31,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [13918244] [2021-11-25 18:15:31,833 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 18:15:31,835 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:15:31,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:15:31,836 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:15:31,837 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:15:31,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:31,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:31,921 INFO L354 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2021-11-25 18:15:31,924 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 3 case distinctions, treesize of input 25 treesize of output 53 [2021-11-25 18:15:31,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:31,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,019 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:15:32,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:15:32,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:32,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:15:32,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:32,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,284 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:15:32,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 308 [2021-11-25 18:15:32,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:32,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:32,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:32,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 18:15:32,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:32,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:32,475 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 18:15:32,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:15:32,492 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 11 [2021-11-25 18:15:32,606 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:15:32,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '253#(and (= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (= |ULTIMATE.start_check_~pc#1.base| |ULTIMATE.start_check_#in~pc#1.base|) (= |ULTIMATE.start_check_#in~i#1| |ULTIMATE.start_check_~i#1|) (<= 10 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_check_~pc#1.offset| |ULTIMATE.start_check_#in~pc#1.offset|) (<= (select (select |#memory_int| |ULTIMATE.start_main_~pa~0#1.base|) |ULTIMATE.start_main_~pa~0#1.offset|) |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#cont~0#1.base|) (= |ULTIMATE.start_main_~#cont~0#1.base| |ULTIMATE.start_check_#in~pc#1.base|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= (ite (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_check_~pc#1.base|) |ULTIMATE.start_check_~pc#1.offset|)) (+ 12 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_check_~pc#1.base|) |ULTIMATE.start_check_~pc#1.offset|))) |ULTIMATE.start_check_~i#1|) 1 0) |ULTIMATE.start_check_#res#1|) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_check_#in~i#1|) (= |ULTIMATE.start_main_~#cont~0#1.offset| |ULTIMATE.start_check_#in~pc#1.offset|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (= 0 |ULTIMATE.start_check_#res#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:15:32,914 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:15:32,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:15:32,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-25 18:15:32,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576419956] [2021-11-25 18:15:32,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:15:32,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:15:32,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:15:32,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:15:32,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:15:32,916 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 18:15:32,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:15:32,941 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-11-25 18:15:32,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:15:32,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 12 [2021-11-25 18:15:32,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:15:32,943 INFO L225 Difference]: With dead ends: 26 [2021-11-25 18:15:32,943 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 18:15:32,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:15:32,944 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:15:32,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:15:32,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 18:15:32,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-25 18:15:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:15:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-25 18:15:32,950 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-11-25 18:15:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:15:32,950 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-25 18:15:32,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 18:15:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-25 18:15:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:15:32,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:32,951 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:15:32,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:15:33,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-25 18:15:33,166 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:15:33,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:33,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1234407285, now seen corresponding path program 2 times [2021-11-25 18:15:33,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:15:33,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132497407] [2021-11-25 18:15:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:33,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:15:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:15:33,351 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:15:33,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132497407] [2021-11-25 18:15:33,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132497407] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:15:33,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951933967] [2021-11-25 18:15:33,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:15:33,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:15:33,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:15:33,354 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:15:33,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:15:33,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:15:33,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:15:33,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 18:15:33,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:15:33,624 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-25 18:15:33,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 12 [2021-11-25 18:15:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:15:33,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:15:33,713 INFO L354 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2021-11-25 18:15:33,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-25 18:15:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:15:33,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951933967] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:15:33,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [290405354] [2021-11-25 18:15:33,745 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 18:15:33,746 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:15:33,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:15:33,746 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:15:33,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:15:33,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:33,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:33,840 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:15:33,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:15:33,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:33,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:33,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 35 [2021-11-25 18:15:33,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:33,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:33,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:33,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:33,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:33,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:33,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:15:34,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:34,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:34,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:34,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:34,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:34,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:34,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:34,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:34,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:34,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:34,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:34,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:34,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:34,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:34,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:34,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:34,113 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:15:34,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 308 [2021-11-25 18:15:34,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:34,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:34,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:34,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 18:15:34,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:34,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:34,249 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 18:15:34,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:15:34,266 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 11 [2021-11-25 18:15:34,360 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:15:34,800 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '425#(and (= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (= |ULTIMATE.start_check_~pc#1.base| |ULTIMATE.start_check_#in~pc#1.base|) (= |ULTIMATE.start_check_#in~i#1| |ULTIMATE.start_check_~i#1|) (<= 10 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_check_~pc#1.offset| |ULTIMATE.start_check_#in~pc#1.offset|) (<= (select (select |#memory_int| |ULTIMATE.start_main_~pa~0#1.base|) |ULTIMATE.start_main_~pa~0#1.offset|) |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#cont~0#1.base|) (= |ULTIMATE.start_main_~#cont~0#1.base| |ULTIMATE.start_check_#in~pc#1.base|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= (ite (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_check_~pc#1.base|) |ULTIMATE.start_check_~pc#1.offset|)) (+ 12 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_check_~pc#1.base|) |ULTIMATE.start_check_~pc#1.offset|))) |ULTIMATE.start_check_~i#1|) 1 0) |ULTIMATE.start_check_#res#1|) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_check_#in~i#1|) (= |ULTIMATE.start_main_~#cont~0#1.offset| |ULTIMATE.start_check_#in~pc#1.offset|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (= 0 |ULTIMATE.start_check_#res#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:15:34,800 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:15:34,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:15:34,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2021-11-25 18:15:34,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62725714] [2021-11-25 18:15:34,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:15:34,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 18:15:34,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:15:34,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 18:15:34,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-11-25 18:15:34,803 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 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 18:15:34,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:15:34,981 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-11-25 18:15:34,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 18:15:34,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 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 15 [2021-11-25 18:15:34,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:15:34,982 INFO L225 Difference]: With dead ends: 31 [2021-11-25 18:15:34,982 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 18:15:34,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-11-25 18:15:34,984 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:15:34,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 3 Unchecked, 0.1s Time] [2021-11-25 18:15:34,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 18:15:34,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-25 18:15:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 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 18:15:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-25 18:15:34,990 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2021-11-25 18:15:34,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:15:34,991 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-25 18:15:34,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 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 18:15:34,991 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-25 18:15:34,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 18:15:34,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:34,992 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:15:35,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:15:35,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:15:35,193 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:15:35,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:35,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1951031086, now seen corresponding path program 3 times [2021-11-25 18:15:35,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:15:35,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601988606] [2021-11-25 18:15:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:35,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:15:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:15:35,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:15:35,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601988606] [2021-11-25 18:15:35,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601988606] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:15:35,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135946566] [2021-11-25 18:15:35,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:15:35,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:15:35,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:15:35,350 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:15:35,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:15:35,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:15:35,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:15:35,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 18:15:35,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:15:37,773 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-25 18:15:37,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 12 [2021-11-25 18:15:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:15:37,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:15:37,980 INFO L354 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2021-11-25 18:15:37,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-25 18:15:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:15:37,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135946566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:15:37,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [681103617] [2021-11-25 18:15:38,001 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 18:15:38,001 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:15:38,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:15:38,001 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:15:38,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:15:38,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,084 INFO L354 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2021-11-25 18:15:38,085 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 3 case distinctions, treesize of input 25 treesize of output 53 [2021-11-25 18:15:38,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,177 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:15:38,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:15:38,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 18:15:38,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 37 [2021-11-25 18:15:38,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 18:15:38,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:38,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:15:38,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,447 INFO L354 Elim1Store]: treesize reduction 88, result has 29.0 percent of original size [2021-11-25 18:15:38,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 306 treesize of output 312 [2021-11-25 18:15:38,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:38,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:38,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 18:15:38,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:38,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:38,821 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 18:15:38,830 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 11 [2021-11-25 18:15:38,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:15:38,930 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:15:39,431 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '660#(and (= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (= |ULTIMATE.start_check_~pc#1.base| |ULTIMATE.start_check_#in~pc#1.base|) (= |ULTIMATE.start_check_#in~i#1| |ULTIMATE.start_check_~i#1|) (<= 10 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_check_~pc#1.offset| |ULTIMATE.start_check_#in~pc#1.offset|) (<= (select (select |#memory_int| |ULTIMATE.start_main_~pa~0#1.base|) |ULTIMATE.start_main_~pa~0#1.offset|) |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#cont~0#1.base|) (= |ULTIMATE.start_main_~#cont~0#1.base| |ULTIMATE.start_check_#in~pc#1.base|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= (ite (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_check_~pc#1.base|) |ULTIMATE.start_check_~pc#1.offset|)) (+ 12 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_check_~pc#1.base|) |ULTIMATE.start_check_~pc#1.offset|))) |ULTIMATE.start_check_~i#1|) 1 0) |ULTIMATE.start_check_#res#1|) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_check_#in~i#1|) (= |ULTIMATE.start_main_~#cont~0#1.offset| |ULTIMATE.start_check_#in~pc#1.offset|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (= 0 |ULTIMATE.start_check_#res#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:15:39,431 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:15:39,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:15:39,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2021-11-25 18:15:39,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015443575] [2021-11-25 18:15:39,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:15:39,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-25 18:15:39,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:15:39,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-25 18:15:39,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-11-25 18:15:39,433 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 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 18:15:39,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:15:39,732 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-11-25 18:15:39,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 18:15:39,733 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 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 20 [2021-11-25 18:15:39,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:15:39,734 INFO L225 Difference]: With dead ends: 44 [2021-11-25 18:15:39,734 INFO L226 Difference]: Without dead ends: 30 [2021-11-25 18:15:39,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 18:15:39,735 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:15:39,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2021-11-25 18:15:39,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-25 18:15:39,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-25 18:15:39,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:15:39,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-25 18:15:39,741 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 20 [2021-11-25 18:15:39,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:15:39,741 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-25 18:15:39,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 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 18:15:39,742 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-25 18:15:39,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 18:15:39,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:39,743 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:15:39,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:15:39,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:15:39,955 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:15:39,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:39,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1681511095, now seen corresponding path program 4 times [2021-11-25 18:15:39,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:15:39,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129721833] [2021-11-25 18:15:39,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:39,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:15:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:40,077 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-25 18:15:40,078 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:15:40,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129721833] [2021-11-25 18:15:40,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129721833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:15:40,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505185109] [2021-11-25 18:15:40,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:15:40,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:15:40,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:15:40,085 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:15:40,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:15:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:40,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:15:40,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:15:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-25 18:15:40,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:15:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-25 18:15:40,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505185109] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:15:40,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639115044] [2021-11-25 18:15:40,370 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 18:15:40,371 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:15:40,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:15:40,371 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:15:40,371 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:15:40,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,468 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:15:40,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:15:40,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 35 [2021-11-25 18:15:40,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:40,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:40,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:15:40,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,675 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:15:40,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 308 [2021-11-25 18:15:40,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:40,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:40,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 18:15:40,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:40,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:40,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:15:40,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:15:40,857 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 11 [2021-11-25 18:15:40,866 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 18:15:40,985 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:15:41,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '975#(and (= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (= |ULTIMATE.start_check_~pc#1.base| |ULTIMATE.start_check_#in~pc#1.base|) (= |ULTIMATE.start_check_#in~i#1| |ULTIMATE.start_check_~i#1|) (<= 10 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_check_~pc#1.offset| |ULTIMATE.start_check_#in~pc#1.offset|) (<= (select (select |#memory_int| |ULTIMATE.start_main_~pa~0#1.base|) |ULTIMATE.start_main_~pa~0#1.offset|) |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#cont~0#1.base|) (= |ULTIMATE.start_main_~#cont~0#1.base| |ULTIMATE.start_check_#in~pc#1.base|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= (ite (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_check_~pc#1.base|) |ULTIMATE.start_check_~pc#1.offset|)) (+ 12 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_check_~pc#1.base|) |ULTIMATE.start_check_~pc#1.offset|))) |ULTIMATE.start_check_~i#1|) 1 0) |ULTIMATE.start_check_#res#1|) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_check_#in~i#1|) (= |ULTIMATE.start_main_~#cont~0#1.offset| |ULTIMATE.start_check_#in~pc#1.offset|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (= 0 |ULTIMATE.start_check_#res#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:15:41,378 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:15:41,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:15:41,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2021-11-25 18:15:41,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622043399] [2021-11-25 18:15:41,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:15:41,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 18:15:41,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:15:41,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 18:15:41,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:15:41,380 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:15:41,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:15:41,419 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-11-25 18:15:41,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:15:41,420 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-25 18:15:41,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:15:41,420 INFO L225 Difference]: With dead ends: 56 [2021-11-25 18:15:41,421 INFO L226 Difference]: Without dead ends: 34 [2021-11-25 18:15:41,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:15:41,422 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:15:41,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:15:41,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-25 18:15:41,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-25 18:15:41,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 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 18:15:41,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-11-25 18:15:41,430 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2021-11-25 18:15:41,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:15:41,430 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-11-25 18:15:41,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:15:41,430 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-11-25 18:15:41,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 18:15:41,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:41,432 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:15:41,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:15:41,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:15:41,634 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:15:41,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:41,634 INFO L85 PathProgramCache]: Analyzing trace with hash 457352311, now seen corresponding path program 5 times [2021-11-25 18:15:41,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:15:41,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417927133] [2021-11-25 18:15:41,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:41,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:15:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 18:15:43,040 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:15:43,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417927133] [2021-11-25 18:15:43,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417927133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:15:43,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590084656] [2021-11-25 18:15:43,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:15:43,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:15:43,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:15:43,043 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:15:43,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:16:22,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-25 18:16:22,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:16:22,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-25 18:16:22,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:16:22,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:16:22,573 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-25 18:16:22,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-11-25 18:16:22,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:16:23,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:23,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 9 [2021-11-25 18:16:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:16:23,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:16:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-25 18:16:23,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590084656] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:16:23,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [992479198] [2021-11-25 18:16:23,409 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 18:16:23,409 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:16:23,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:16:23,410 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:16:23,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:16:23,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,511 INFO L354 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2021-11-25 18:16:23,511 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 3 case distinctions, treesize of input 25 treesize of output 53 [2021-11-25 18:16:23,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,613 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:16:23,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:16:23,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 18:16:23,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 37 [2021-11-25 18:16:23,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 18:16:23,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:16:23,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:16:23,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:23,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,857 INFO L354 Elim1Store]: treesize reduction 88, result has 29.0 percent of original size [2021-11-25 18:16:23,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 306 treesize of output 312 [2021-11-25 18:16:24,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:24,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:16:24,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:24,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2021-11-25 18:16:24,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:24,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 18:16:24,084 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 11 [2021-11-25 18:16:24,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:16:24,108 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 18:16:24,220 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:16:24,792 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1352#(and (= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (= |ULTIMATE.start_check_~pc#1.base| |ULTIMATE.start_check_#in~pc#1.base|) (= |ULTIMATE.start_check_#in~i#1| |ULTIMATE.start_check_~i#1|) (<= 10 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_check_~pc#1.offset| |ULTIMATE.start_check_#in~pc#1.offset|) (<= (select (select |#memory_int| |ULTIMATE.start_main_~pa~0#1.base|) |ULTIMATE.start_main_~pa~0#1.offset|) |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#cont~0#1.base|) (= |ULTIMATE.start_main_~#cont~0#1.base| |ULTIMATE.start_check_#in~pc#1.base|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= (ite (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_check_~pc#1.base|) |ULTIMATE.start_check_~pc#1.offset|)) (+ 12 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_check_~pc#1.base|) |ULTIMATE.start_check_~pc#1.offset|))) |ULTIMATE.start_check_~i#1|) 1 0) |ULTIMATE.start_check_#res#1|) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_check_#in~i#1|) (= |ULTIMATE.start_main_~#cont~0#1.offset| |ULTIMATE.start_check_#in~pc#1.offset|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (= 0 |ULTIMATE.start_check_#res#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:16:24,792 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:16:24,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:16:24,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 12] total 35 [2021-11-25 18:16:24,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769163598] [2021-11-25 18:16:24,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:16:24,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-25 18:16:24,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:16:24,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-25 18:16:24,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-11-25 18:16:24,795 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 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 18:16:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:16:25,930 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-11-25 18:16:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-25 18:16:25,931 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 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 33 [2021-11-25 18:16:25,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:16:25,932 INFO L225 Difference]: With dead ends: 44 [2021-11-25 18:16:25,932 INFO L226 Difference]: Without dead ends: 40 [2021-11-25 18:16:25,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=680, Invalid=3352, Unknown=0, NotChecked=0, Total=4032 [2021-11-25 18:16:25,935 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:16:25,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 38 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:16:25,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-25 18:16:25,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-25 18:16:25,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 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 18:16:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-25 18:16:25,943 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 33 [2021-11-25 18:16:25,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:16:25,944 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-25 18:16:25,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 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 18:16:25,944 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-25 18:16:25,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 18:16:25,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:16:25,946 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:16:25,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:16:26,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 18:16:26,162 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:16:26,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:16:26,162 INFO L85 PathProgramCache]: Analyzing trace with hash 608654984, now seen corresponding path program 6 times [2021-11-25 18:16:26,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:16:26,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472379120] [2021-11-25 18:16:26,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:16:26,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:16:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:16:26,239 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 18:16:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:16:26,356 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 18:16:26,356 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 18:16:26,357 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 18:16:26,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:16:26,362 INFO L732 BasicCegarLoop]: Path program histogram: [6, 1, 1] [2021-11-25 18:16:26,366 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:16:26,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:16:26 BoogieIcfgContainer [2021-11-25 18:16:26,416 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:16:26,416 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:16:26,416 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:16:26,417 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:16:26,417 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:15:28" (3/4) ... [2021-11-25 18:16:26,419 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-25 18:16:26,509 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 18:16:26,509 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:16:26,510 INFO L158 Benchmark]: Toolchain (without parser) took 58618.47ms. Allocated memory was 127.9MB in the beginning and 268.4MB in the end (delta: 140.5MB). Free memory was 87.8MB in the beginning and 124.6MB in the end (delta: -36.8MB). Peak memory consumption was 101.8MB. Max. memory is 16.1GB. [2021-11-25 18:16:26,510 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 127.9MB. Free memory was 104.5MB in the beginning and 104.5MB in the end (delta: 77.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:16:26,512 INFO L158 Benchmark]: CACSL2BoogieTranslator took 321.66ms. Allocated memory is still 127.9MB. Free memory was 87.7MB in the beginning and 102.4MB in the end (delta: -14.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 18:16:26,513 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.52ms. Allocated memory is still 127.9MB. Free memory was 102.4MB in the beginning and 100.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:16:26,513 INFO L158 Benchmark]: Boogie Preprocessor took 51.18ms. Allocated memory is still 127.9MB. Free memory was 100.9MB in the beginning and 99.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:16:26,513 INFO L158 Benchmark]: RCFGBuilder took 388.11ms. Allocated memory is still 127.9MB. Free memory was 99.5MB in the beginning and 87.4MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 18:16:26,514 INFO L158 Benchmark]: TraceAbstraction took 57700.40ms. Allocated memory was 127.9MB in the beginning and 268.4MB in the end (delta: 140.5MB). Free memory was 87.0MB in the beginning and 128.8MB in the end (delta: -41.9MB). Peak memory consumption was 101.9MB. Max. memory is 16.1GB. [2021-11-25 18:16:26,515 INFO L158 Benchmark]: Witness Printer took 93.18ms. Allocated memory is still 268.4MB. Free memory was 128.8MB in the beginning and 124.6MB in the end (delta: 4.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:16:26,525 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 127.9MB. Free memory was 104.5MB in the beginning and 104.5MB in the end (delta: 77.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 321.66ms. Allocated memory is still 127.9MB. Free memory was 87.7MB in the beginning and 102.4MB in the end (delta: -14.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.52ms. Allocated memory is still 127.9MB. Free memory was 102.4MB in the beginning and 100.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 51.18ms. Allocated memory is still 127.9MB. Free memory was 100.9MB in the beginning and 99.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 388.11ms. Allocated memory is still 127.9MB. Free memory was 99.5MB in the beginning and 87.4MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 57700.40ms. Allocated memory was 127.9MB in the beginning and 268.4MB in the end (delta: 140.5MB). Free memory was 87.0MB in the beginning and 128.8MB in the end (delta: -41.9MB). Peak memory consumption was 101.9MB. Max. memory is 16.1GB. * Witness Printer took 93.18ms. Allocated memory is still 268.4MB. Free memory was 128.8MB in the beginning and 124.6MB in the end (delta: 4.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 47]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] struct cont cont; [L22] struct dummy array[10]; [L23] int i, *pa; [L24] i = __VERIFIER_nondet_int() [L26] int j = 0; VAL [array={5:0}, cont={6:0}, i=2, j=0] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=2, j=1] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=2, j=2] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=2, j=3] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=2, j=4] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=2, j=5] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=2, j=6] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=2, j=7] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=2, j=8] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=2, j=9] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=2, j=10] [L26] COND FALSE !(j < 10) VAL [array={5:0}, cont={6:0}, i=2, j=10] [L31] COND TRUE i >= 0 && i < 9 [L32] cont.array = &array[i] [L33] EXPR cont.array [L33] pa = &cont.array[0].b [L34] EXPR cont.array [L34] EXPR cont.array[0].b VAL [array={5:0}, cont={6:0}, cont.array={5:16}, cont.array[0].b=17, i=2, j=10, pa={5:20}] [L34] COND TRUE cont.array[0].b > 0 [L35] EXPR array[i].b [L35] i = array[i].b - 10 [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=7, j=10, pa={5:20}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=8, j=10, pa={5:20}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=8, j=10, pa={5:20}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=9, j=10, pa={5:20}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=9, j=10, pa={5:20}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=10, j=10, pa={5:20}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=10, j=10, pa={5:20}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=11, j=10, pa={5:20}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=11, j=10, pa={5:20}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=12, j=10, pa={5:20}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=12, j=10, pa={5:20}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=13, j=10, pa={5:20}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=13, j=10, pa={5:20}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=14, j=10, pa={5:20}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=14, j=10, pa={5:20}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=15, j=10, pa={5:20}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=15, j=10, pa={5:20}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=16, j=10, pa={5:20}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=16, j=10, pa={5:20}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=17, j=10, pa={5:20}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=17, j=10, pa={5:20}] [L36] COND FALSE !(i < *pa) [L39] CALL, EXPR check(&cont, i) [L16] EXPR pc->array [L16] EXPR pc->array[1].b [L16] return pc->array[1].b == i; [L39] RET, EXPR check(&cont, i) [L39] COND TRUE !check(&cont, i) [L47] reach_error() VAL [array={5:0}, cont={6:0}, i=17, j=10, pa={5:20}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 57.6s, OverallIterations: 8, TraceHistogramMax: 11, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 57 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 57 mSDsluCounter, 161 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 14 IncrementalHoareTripleChecker+Unchecked, 151 mSDsCounter, 40 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 381 IncrementalHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 40 mSolverCounterUnsat, 38 mSDtfsCounter, 381 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 431 GetRequests, 264 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=7, InterpolantAutomatonStates: 95, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 40.0s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 285 NumberOfCodeBlocks, 276 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 346 ConstructedInterpolants, 10 QuantifiedInterpolants, 1989 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1236 ConjunctsInSsa, 119 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 336/693 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 7, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME: 1.3s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 9, TOOLS_QUANTIFIERELIM_TIME: 1.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.6s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 23, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 7, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 1.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 72, DAG_COMPRESSION_RETAINED_NODES: 26, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-25 18:16:26,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_275a8390-ab0b-4e09-9668-a2f02afe48ba/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE