./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/heap-manipulation/dancing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/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_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/dancing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c2e0266b63b958a771d0226973905d5a39a7a28d05d194ae66381394d9ab520a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:40:33,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:40:33,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:40:33,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:40:33,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:40:33,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:40:33,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:40:33,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:40:33,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:40:33,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:40:33,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:40:33,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:40:33,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:40:33,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:40:33,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:40:33,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:40:33,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:40:33,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:40:33,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:40:33,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:40:33,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:40:33,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:40:33,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:40:33,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:40:33,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:40:33,265 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:40:33,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:40:33,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:40:33,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:40:33,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:40:33,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:40:33,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:40:33,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:40:33,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:40:33,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:40:33,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:40:33,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:40:33,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:40:33,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:40:33,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:40:33,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:40:33,280 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 18:40:33,309 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:40:33,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:40:33,310 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:40:33,310 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:40:33,311 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:40:33,311 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:40:33,312 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:40:33,312 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:40:33,312 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:40:33,312 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:40:33,313 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:40:33,313 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:40:33,313 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:40:33,318 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:40:33,319 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:40:33,319 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:40:33,319 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:40:33,320 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:40:33,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 18:40:33,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 18:40:33,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:40:33,321 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:40:33,322 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:40:33,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:40:33,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:40:33,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:40:33,323 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 18:40:33,324 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 18:40:33,325 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 18:40:33,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:40:33,326 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:40:33,326 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:40:33,326 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:40:33,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:40:33,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:40:33,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:40:33,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:40:33,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:40:33,329 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:40:33,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:40:33,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:40:33,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:40:33,330 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_26546a68-af49-4797-a64b-3ab5a14c3e31/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2e0266b63b958a771d0226973905d5a39a7a28d05d194ae66381394d9ab520a [2021-11-25 18:40:33,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:40:33,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:40:33,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:40:33,736 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:40:33,737 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:40:33,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/heap-manipulation/dancing.i [2021-11-25 18:40:33,819 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/data/5dc805bf7/31e0a45ae4394c28a3d5117f291b3cea/FLAG4e2d98edd [2021-11-25 18:40:34,387 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:40:34,388 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/sv-benchmarks/c/heap-manipulation/dancing.i [2021-11-25 18:40:34,410 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/data/5dc805bf7/31e0a45ae4394c28a3d5117f291b3cea/FLAG4e2d98edd [2021-11-25 18:40:34,690 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/data/5dc805bf7/31e0a45ae4394c28a3d5117f291b3cea [2021-11-25 18:40:34,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:40:34,695 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:40:34,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:40:34,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:40:34,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:40:34,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:40:34" (1/1) ... [2021-11-25 18:40:34,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ac6861a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:34, skipping insertion in model container [2021-11-25 18:40:34,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:40:34" (1/1) ... [2021-11-25 18:40:34,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:40:34,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:40:35,069 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_26546a68-af49-4797-a64b-3ab5a14c3e31/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-11-25 18:40:35,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:40:35,336 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:40:35,359 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_26546a68-af49-4797-a64b-3ab5a14c3e31/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-11-25 18:40:35,404 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:40:35,444 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:40:35,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:35 WrapperNode [2021-11-25 18:40:35,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:40:35,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:40:35,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:40:35,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:40:35,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:35" (1/1) ... [2021-11-25 18:40:35,475 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:35" (1/1) ... [2021-11-25 18:40:35,505 INFO L137 Inliner]: procedures = 124, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 90 [2021-11-25 18:40:35,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:40:35,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:40:35,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:40:35,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:40:35,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:35" (1/1) ... [2021-11-25 18:40:35,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:35" (1/1) ... [2021-11-25 18:40:35,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:35" (1/1) ... [2021-11-25 18:40:35,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:35" (1/1) ... [2021-11-25 18:40:35,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:35" (1/1) ... [2021-11-25 18:40:35,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:35" (1/1) ... [2021-11-25 18:40:35,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:35" (1/1) ... [2021-11-25 18:40:35,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:40:35,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:40:35,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:40:35,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:40:35,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:35" (1/1) ... [2021-11-25 18:40:35,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:40:35,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:35,597 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:40:35,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:40:35,660 INFO L130 BoogieDeclarations]: Found specification of procedure is_list_containing_x [2021-11-25 18:40:35,661 INFO L138 BoogieDeclarations]: Found implementation of procedure is_list_containing_x [2021-11-25 18:40:35,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:40:35,662 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:40:35,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:40:35,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:40:35,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:40:35,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:40:35,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:40:35,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:40:35,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:40:35,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:40:35,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:40:35,784 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:40:35,787 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:40:36,327 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:40:36,379 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:40:36,382 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:40:36,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:40:36 BoogieIcfgContainer [2021-11-25 18:40:36,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:40:36,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:40:36,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:40:36,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:40:36,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:40:34" (1/3) ... [2021-11-25 18:40:36,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b1ee809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:40:36, skipping insertion in model container [2021-11-25 18:40:36,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:35" (2/3) ... [2021-11-25 18:40:36,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b1ee809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:40:36, skipping insertion in model container [2021-11-25 18:40:36,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:40:36" (3/3) ... [2021-11-25 18:40:36,399 INFO L111 eAbstractionObserver]: Analyzing ICFG dancing.i [2021-11-25 18:40:36,410 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:40:36,411 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2021-11-25 18:40:36,464 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:40:36,472 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:40:36,473 INFO L340 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2021-11-25 18:40:36,494 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 45 states have (on average 2.2) internal successors, (99), 89 states have internal predecessors, (99), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:40:36,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-25 18:40:36,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:36,503 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-25 18:40:36,503 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:40:36,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:36,510 INFO L85 PathProgramCache]: Analyzing trace with hash 6700, now seen corresponding path program 1 times [2021-11-25 18:40:36,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:36,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897152636] [2021-11-25 18:40:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:36,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:36,709 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 18:40:36,710 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:36,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897152636] [2021-11-25 18:40:36,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897152636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:36,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:36,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 18:40:36,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545007070] [2021-11-25 18:40:36,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:36,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:40:36,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:36,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:40:36,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:40:36,790 INFO L87 Difference]: Start difference. First operand has 98 states, 45 states have (on average 2.2) internal successors, (99), 89 states have internal predecessors, (99), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 18:40:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:36,992 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2021-11-25 18:40:36,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:40:36,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2021-11-25 18:40:36,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:37,007 INFO L225 Difference]: With dead ends: 96 [2021-11-25 18:40:37,008 INFO L226 Difference]: Without dead ends: 95 [2021-11-25 18:40:37,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 18:40:37,015 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 73 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:37,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 79 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:40:37,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-25 18:40:37,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-25 18:40:37,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 45 states have (on average 2.111111111111111) internal successors, (95), 86 states have internal predecessors, (95), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:40:37,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2021-11-25 18:40:37,087 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 2 [2021-11-25 18:40:37,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:37,088 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2021-11-25 18:40:37,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 18:40:37,089 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2021-11-25 18:40:37,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-25 18:40:37,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:37,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-25 18:40:37,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:40:37,091 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:40:37,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:37,096 INFO L85 PathProgramCache]: Analyzing trace with hash 6701, now seen corresponding path program 1 times [2021-11-25 18:40:37,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:37,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318819788] [2021-11-25 18:40:37,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:37,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:37,158 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 18:40:37,159 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:37,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318819788] [2021-11-25 18:40:37,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318819788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:37,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:37,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 18:40:37,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933430795] [2021-11-25 18:40:37,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:37,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:40:37,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:37,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:40:37,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:40:37,163 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 18:40:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:37,270 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2021-11-25 18:40:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:40:37,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2021-11-25 18:40:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:37,273 INFO L225 Difference]: With dead ends: 93 [2021-11-25 18:40:37,273 INFO L226 Difference]: Without dead ends: 93 [2021-11-25 18:40:37,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 18:40:37,276 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 71 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:37,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 80 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:40:37,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-25 18:40:37,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-25 18:40:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 45 states have (on average 2.066666666666667) internal successors, (93), 84 states have internal predecessors, (93), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:40:37,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2021-11-25 18:40:37,290 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 2 [2021-11-25 18:40:37,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:37,290 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2021-11-25 18:40:37,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 18:40:37,291 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2021-11-25 18:40:37,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:40:37,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:37,292 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:40:37,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:40:37,292 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:40:37,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:37,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1897110090, now seen corresponding path program 1 times [2021-11-25 18:40:37,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:37,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37380780] [2021-11-25 18:40:37,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:37,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:37,368 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 18:40:37,368 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:37,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37380780] [2021-11-25 18:40:37,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37380780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:37,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:37,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:40:37,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957141855] [2021-11-25 18:40:37,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:37,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:40:37,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:37,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:40:37,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:40:37,372 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 18:40:37,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:37,559 INFO L93 Difference]: Finished difference Result 150 states and 173 transitions. [2021-11-25 18:40:37,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:40:37,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-11-25 18:40:37,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:37,567 INFO L225 Difference]: With dead ends: 150 [2021-11-25 18:40:37,567 INFO L226 Difference]: Without dead ends: 150 [2021-11-25 18:40:37,567 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 18:40:37,577 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 66 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:37,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 179 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:40:37,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-25 18:40:37,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 91. [2021-11-25 18:40:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 45 states have (on average 2.022222222222222) internal successors, (91), 82 states have internal predecessors, (91), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:40:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2021-11-25 18:40:37,592 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 6 [2021-11-25 18:40:37,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:37,593 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2021-11-25 18:40:37,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 18:40:37,593 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2021-11-25 18:40:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:40:37,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:37,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:40:37,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:40:37,595 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:40:37,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:37,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1897110091, now seen corresponding path program 1 times [2021-11-25 18:40:37,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:37,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188153293] [2021-11-25 18:40:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:37,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:37,682 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 18:40:37,683 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:37,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188153293] [2021-11-25 18:40:37,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188153293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:37,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:37,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:40:37,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276109416] [2021-11-25 18:40:37,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:37,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:40:37,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:37,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:40:37,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:40:37,686 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 18:40:37,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:37,870 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2021-11-25 18:40:37,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:40:37,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-11-25 18:40:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:37,873 INFO L225 Difference]: With dead ends: 150 [2021-11-25 18:40:37,874 INFO L226 Difference]: Without dead ends: 150 [2021-11-25 18:40:37,875 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 18:40:37,887 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 66 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:37,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 183 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:40:37,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-25 18:40:37,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 89. [2021-11-25 18:40:37,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 80 states have internal predecessors, (89), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:40:37,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2021-11-25 18:40:37,915 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 6 [2021-11-25 18:40:37,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:37,916 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2021-11-25 18:40:37,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 18:40:37,917 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2021-11-25 18:40:37,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:40:37,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:37,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:37,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:40:37,919 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:40:37,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:37,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2076841129, now seen corresponding path program 1 times [2021-11-25 18:40:37,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:37,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730643035] [2021-11-25 18:40:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:37,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:38,066 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 18:40:38,066 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:38,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730643035] [2021-11-25 18:40:38,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730643035] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:38,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:38,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:40:38,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803016882] [2021-11-25 18:40:38,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:38,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:40:38,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:38,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:40:38,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:40:38,070 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:38,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:38,231 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2021-11-25 18:40:38,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:40:38,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 18:40:38,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:38,236 INFO L225 Difference]: With dead ends: 160 [2021-11-25 18:40:38,237 INFO L226 Difference]: Without dead ends: 160 [2021-11-25 18:40:38,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:40:38,239 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 70 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:38,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 346 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:40:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-25 18:40:38,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 123. [2021-11-25 18:40:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 110 states have internal predecessors, (153), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-25 18:40:38,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 173 transitions. [2021-11-25 18:40:38,282 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 173 transitions. Word has length 8 [2021-11-25 18:40:38,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:38,283 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 173 transitions. [2021-11-25 18:40:38,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:38,284 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 173 transitions. [2021-11-25 18:40:38,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:40:38,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:38,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:38,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:40:38,285 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:40:38,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:38,287 INFO L85 PathProgramCache]: Analyzing trace with hash 2056662894, now seen corresponding path program 1 times [2021-11-25 18:40:38,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:38,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453358266] [2021-11-25 18:40:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:38,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:38,484 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 18:40:38,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:38,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453358266] [2021-11-25 18:40:38,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453358266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:38,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:38,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:40:38,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564604122] [2021-11-25 18:40:38,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:38,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:40:38,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:38,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:40:38,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:40:38,487 INFO L87 Difference]: Start difference. First operand 123 states and 173 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 18:40:38,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:38,625 INFO L93 Difference]: Finished difference Result 122 states and 172 transitions. [2021-11-25 18:40:38,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:40:38,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 18:40:38,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:38,629 INFO L225 Difference]: With dead ends: 122 [2021-11-25 18:40:38,629 INFO L226 Difference]: Without dead ends: 122 [2021-11-25 18:40:38,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:40:38,631 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 127 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:38,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 93 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:40:38,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-25 18:40:38,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-25 18:40:38,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 74 states have (on average 2.054054054054054) internal successors, (152), 109 states have internal predecessors, (152), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-25 18:40:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 172 transitions. [2021-11-25 18:40:38,664 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 172 transitions. Word has length 8 [2021-11-25 18:40:38,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:38,664 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 172 transitions. [2021-11-25 18:40:38,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 18:40:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 172 transitions. [2021-11-25 18:40:38,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:40:38,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:38,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:38,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:40:38,666 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:40:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:38,668 INFO L85 PathProgramCache]: Analyzing trace with hash 2056662893, now seen corresponding path program 1 times [2021-11-25 18:40:38,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:38,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726133638] [2021-11-25 18:40:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:38,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:38,804 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 18:40:38,805 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:38,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726133638] [2021-11-25 18:40:38,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726133638] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:38,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:38,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:40:38,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181146092] [2021-11-25 18:40:38,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:38,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:40:38,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:38,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:40:38,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:40:38,807 INFO L87 Difference]: Start difference. First operand 122 states and 172 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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 18:40:38,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:38,912 INFO L93 Difference]: Finished difference Result 121 states and 171 transitions. [2021-11-25 18:40:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:40:38,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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 18:40:38,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:38,914 INFO L225 Difference]: With dead ends: 121 [2021-11-25 18:40:38,914 INFO L226 Difference]: Without dead ends: 121 [2021-11-25 18:40:38,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:40:38,915 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 187 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:38,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 92 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:40:38,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-25 18:40:38,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-25 18:40:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 108 states have internal predecessors, (151), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-25 18:40:38,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 171 transitions. [2021-11-25 18:40:38,924 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 171 transitions. Word has length 8 [2021-11-25 18:40:38,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:38,924 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 171 transitions. [2021-11-25 18:40:38,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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 18:40:38,925 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 171 transitions. [2021-11-25 18:40:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:40:38,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:38,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:38,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:40:38,926 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:40:38,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:38,927 INFO L85 PathProgramCache]: Analyzing trace with hash 2124365722, now seen corresponding path program 1 times [2021-11-25 18:40:38,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:38,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673453799] [2021-11-25 18:40:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:38,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:39,035 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 18:40:39,035 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:39,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673453799] [2021-11-25 18:40:39,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673453799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:39,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:39,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:40:39,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929902272] [2021-11-25 18:40:39,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:39,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:40:39,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:39,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:40:39,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:40:39,044 INFO L87 Difference]: Start difference. First operand 121 states and 171 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:40:39,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:39,297 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2021-11-25 18:40:39,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:40:39,297 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-25 18:40:39,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:39,299 INFO L225 Difference]: With dead ends: 143 [2021-11-25 18:40:39,299 INFO L226 Difference]: Without dead ends: 143 [2021-11-25 18:40:39,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:40:39,300 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 322 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:39,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 132 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:40:39,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-25 18:40:39,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 116. [2021-11-25 18:40:39,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 74 states have (on average 1.8918918918918919) internal successors, (140), 103 states have internal predecessors, (140), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-25 18:40:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 160 transitions. [2021-11-25 18:40:39,307 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 160 transitions. Word has length 11 [2021-11-25 18:40:39,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:39,308 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 160 transitions. [2021-11-25 18:40:39,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:40:39,308 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 160 transitions. [2021-11-25 18:40:39,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:40:39,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:39,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:39,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:40:39,309 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:40:39,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:39,310 INFO L85 PathProgramCache]: Analyzing trace with hash 2124365723, now seen corresponding path program 1 times [2021-11-25 18:40:39,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:39,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354902345] [2021-11-25 18:40:39,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:39,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:39,457 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 18:40:39,457 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:39,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354902345] [2021-11-25 18:40:39,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354902345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:39,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:39,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:40:39,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222808073] [2021-11-25 18:40:39,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:39,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:40:39,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:39,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:40:39,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:40:39,460 INFO L87 Difference]: Start difference. First operand 116 states and 160 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:40:39,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:39,773 INFO L93 Difference]: Finished difference Result 139 states and 161 transitions. [2021-11-25 18:40:39,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:40:39,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-25 18:40:39,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:39,776 INFO L225 Difference]: With dead ends: 139 [2021-11-25 18:40:39,776 INFO L226 Difference]: Without dead ends: 139 [2021-11-25 18:40:39,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:40:39,777 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 204 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:39,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 180 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:40:39,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-25 18:40:39,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 116. [2021-11-25 18:40:39,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 74 states have (on average 1.8108108108108107) internal successors, (134), 103 states have internal predecessors, (134), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-25 18:40:39,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 154 transitions. [2021-11-25 18:40:39,784 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 154 transitions. Word has length 11 [2021-11-25 18:40:39,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:39,785 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 154 transitions. [2021-11-25 18:40:39,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:40:39,785 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 154 transitions. [2021-11-25 18:40:39,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:40:39,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:39,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:39,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:40:39,786 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:40:39,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:39,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1159058315, now seen corresponding path program 1 times [2021-11-25 18:40:39,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:39,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029930382] [2021-11-25 18:40:39,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:39,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:39,865 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 18:40:39,865 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:39,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029930382] [2021-11-25 18:40:39,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029930382] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:39,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016842561] [2021-11-25 18:40:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:39,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:39,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:39,878 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:39,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:40:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:39,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:40:39,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:40,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:40:40,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:40:40,255 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 18:40:40,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:40,462 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 18:40:40,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016842561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:40:40,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1673796323] [2021-11-25 18:40:40,490 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 18:40:40,491 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:40,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:40,506 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:40,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:40,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:40:40,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:40,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:40:40,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:40,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:40:40,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:40:40,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:40:40,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:40:40,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:40:40,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:40:40,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:40:41,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:40:41,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:40:41,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:40:41,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:41,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 18:40:41,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:40:41,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:41,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 18:40:41,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 54 [2021-11-25 18:40:41,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:40:41,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:41,464 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-25 18:40:41,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 188 treesize of output 133 [2021-11-25 18:40:41,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 62 [2021-11-25 18:40:41,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:41,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:41,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:41,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:41,775 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:40:41,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:40:41,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:41,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:41,817 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:40:41,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 18:40:41,922 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-25 18:40:41,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2021-11-25 18:40:41,947 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:40:41,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 38 [2021-11-25 18:40:42,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:40:42,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:42,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:42,055 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:40:42,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 160 [2021-11-25 18:40:42,078 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-25 18:40:42,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 145 [2021-11-25 18:40:42,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:42,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:42,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:42,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:42,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:42,246 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:40:42,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:40:42,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:42,271 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:40:42,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 18:40:42,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:40:42,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:40:42,420 INFO L197 IcfgInterpreter]: Interpreting procedure is_list_containing_x with input of size 21 for LOIs [2021-11-25 18:40:42,441 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:40:43,125 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2373#(and (<= |is_list_containing_x_#in~x.offset| 0) (not (= (select |#valid| is_list_containing_x_~l.base) 1)) (<= 0 |is_list_containing_x_#in~x.offset|) (= |is_list_containing_x_#in~x.offset| is_list_containing_x_~x.offset) (= is_list_containing_x_~x.base |is_list_containing_x_#in~x.base|) (= |is_list_containing_x_#in~l.offset| is_list_containing_x_~l.offset) (= |#NULL.offset| 0) (= |is_list_containing_x_#in~l.offset| 0) (= is_list_containing_x_~l.base |is_list_containing_x_#in~l.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |is_list_containing_x_#in~l.base|) (= |#NULL.base| 0) (not (= is_list_containing_x_~l.base is_list_containing_x_~x.base)))' at error location [2021-11-25 18:40:43,125 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:40:43,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:40:43,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2021-11-25 18:40:43,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959004212] [2021-11-25 18:40:43,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:40:43,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:40:43,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:43,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:40:43,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:40:43,127 INFO L87 Difference]: Start difference. First operand 116 states and 154 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:43,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:43,324 INFO L93 Difference]: Finished difference Result 128 states and 169 transitions. [2021-11-25 18:40:43,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:40:43,325 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 18:40:43,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:43,326 INFO L225 Difference]: With dead ends: 128 [2021-11-25 18:40:43,327 INFO L226 Difference]: Without dead ends: 128 [2021-11-25 18:40:43,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:40:43,328 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 194 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:43,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 156 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:40:43,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-25 18:40:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2021-11-25 18:40:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 81 states have (on average 1.7777777777777777) internal successors, (144), 109 states have internal predecessors, (144), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-25 18:40:43,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 166 transitions. [2021-11-25 18:40:43,336 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 166 transitions. Word has length 13 [2021-11-25 18:40:43,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:43,337 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 166 transitions. [2021-11-25 18:40:43,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:43,337 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 166 transitions. [2021-11-25 18:40:43,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:40:43,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:43,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:43,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:43,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:43,558 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting is_list_containing_xErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:40:43,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:43,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1159058314, now seen corresponding path program 1 times [2021-11-25 18:40:43,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:43,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62085100] [2021-11-25 18:40:43,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:43,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:43,699 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 18:40:43,699 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:43,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62085100] [2021-11-25 18:40:43,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62085100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:43,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803165232] [2021-11-25 18:40:43,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:43,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:43,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:43,702 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:43,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:40:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:43,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 18:40:43,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:43,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:43,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:40:43,960 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 18:40:43,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:44,133 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 36 treesize of output 32 [2021-11-25 18:40:44,192 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 18:40:44,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803165232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:40:44,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [816848677] [2021-11-25 18:40:44,197 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 18:40:44,198 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:44,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:44,198 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:44,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:44,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:40:44,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:44,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:40:44,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:44,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:40:44,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:40:44,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:40:44,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:40:44,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:40:44,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:40:44,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:40:44,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:40:44,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:40:44,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:40:44,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:40:44,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:44,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 18:40:44,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:44,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 18:40:44,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 54 [2021-11-25 18:40:44,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:40:44,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:44,876 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-25 18:40:44,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 188 treesize of output 133 [2021-11-25 18:40:44,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 62 [2021-11-25 18:40:44,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:44,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:44,971 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 13 treesize of output 9 [2021-11-25 18:40:45,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:45,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:45,028 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:40:45,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 18:40:45,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:45,098 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:40:45,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:40:45,199 INFO L354 Elim1Store]: treesize reduction 32, result has 58.4 percent of original size [2021-11-25 18:40:45,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 66 [2021-11-25 18:40:45,327 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-25 18:40:45,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2021-11-25 18:40:45,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:40:45,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:45,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:45,439 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:40:45,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 172 [2021-11-25 18:40:45,459 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-25 18:40:45,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 145 [2021-11-25 18:40:45,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:45,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:45,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:45,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:45,621 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:40:45,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:40:45,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:45,649 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:40:45,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 18:40:45,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:45,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:40:45,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:40:45,788 INFO L197 IcfgInterpreter]: Interpreting procedure is_list_containing_x with input of size 21 for LOIs [2021-11-25 18:40:45,803 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:40:46,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2724#(and (<= |is_list_containing_x_#in~x.offset| 0) (<= 0 |is_list_containing_x_#in~x.offset|) (= |is_list_containing_x_#in~x.offset| is_list_containing_x_~x.offset) (= is_list_containing_x_~x.base |is_list_containing_x_#in~x.base|) (< (select |#length| is_list_containing_x_~l.base) (+ is_list_containing_x_~l.offset 8)) (= |is_list_containing_x_#in~l.offset| is_list_containing_x_~l.offset) (= |#NULL.offset| 0) (= |is_list_containing_x_#in~l.offset| 0) (= is_list_containing_x_~l.base |is_list_containing_x_#in~l.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |is_list_containing_x_#in~l.base|) (= |#NULL.base| 0) (not (= is_list_containing_x_~l.base is_list_containing_x_~x.base)))' at error location [2021-11-25 18:40:46,583 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:40:46,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:40:46,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-11-25 18:40:46,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145086664] [2021-11-25 18:40:46,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:40:46,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 18:40:46,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:46,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 18:40:46,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:40:46,586 INFO L87 Difference]: Start difference. First operand 124 states and 166 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:46,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:46,892 INFO L93 Difference]: Finished difference Result 125 states and 166 transitions. [2021-11-25 18:40:46,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:40:46,893 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 18:40:46,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:46,897 INFO L225 Difference]: With dead ends: 125 [2021-11-25 18:40:46,897 INFO L226 Difference]: Without dead ends: 125 [2021-11-25 18:40:46,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-11-25 18:40:46,901 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 257 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:46,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 219 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:40:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-25 18:40:46,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-11-25 18:40:46,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 81 states have (on average 1.7407407407407407) internal successors, (141), 108 states have internal predecessors, (141), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-25 18:40:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2021-11-25 18:40:46,914 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 13 [2021-11-25 18:40:46,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:46,914 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2021-11-25 18:40:46,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:46,914 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2021-11-25 18:40:46,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:40:46,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:46,917 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:46,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:47,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 18:40:47,134 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:40:47,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:47,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1754391202, now seen corresponding path program 1 times [2021-11-25 18:40:47,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:47,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754371832] [2021-11-25 18:40:47,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:47,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:47,230 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 18:40:47,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:47,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754371832] [2021-11-25 18:40:47,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754371832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:47,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:47,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:40:47,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515888937] [2021-11-25 18:40:47,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:47,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:40:47,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:47,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:40:47,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:40:47,232 INFO L87 Difference]: Start difference. First operand 123 states and 163 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:40:47,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:47,420 INFO L93 Difference]: Finished difference Result 155 states and 196 transitions. [2021-11-25 18:40:47,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:40:47,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-25 18:40:47,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:47,422 INFO L225 Difference]: With dead ends: 155 [2021-11-25 18:40:47,422 INFO L226 Difference]: Without dead ends: 155 [2021-11-25 18:40:47,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:40:47,423 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 113 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:47,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 277 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:40:47,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-25 18:40:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2021-11-25 18:40:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 78 states have (on average 1.7307692307692308) internal successors, (135), 105 states have internal predecessors, (135), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-25 18:40:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 157 transitions. [2021-11-25 18:40:47,430 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 157 transitions. Word has length 15 [2021-11-25 18:40:47,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:47,430 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 157 transitions. [2021-11-25 18:40:47,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:40:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 157 transitions. [2021-11-25 18:40:47,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 18:40:47,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:47,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:47,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 18:40:47,432 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:40:47,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:47,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2030371260, now seen corresponding path program 1 times [2021-11-25 18:40:47,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:47,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863573905] [2021-11-25 18:40:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:47,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:47,498 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 18:40:47,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:47,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863573905] [2021-11-25 18:40:47,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863573905] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:47,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395776245] [2021-11-25 18:40:47,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:47,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:47,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:47,502 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:47,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:40:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:47,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 18:40:47,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:47,712 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 18:40:47,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:47,819 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:40:47,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 18:40:47,833 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 18:40:47,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395776245] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:40:47,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [412525121] [2021-11-25 18:40:47,836 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:40:47,836 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:47,837 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:47,837 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:47,837 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:47,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:47,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:47,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:40:47,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:47,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:40:47,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:47,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:47,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:47,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:40:47,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:47,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:40:47,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:47,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:40:47,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:47,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:47,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:47,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:47,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:47,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:40:48,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:40:48,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:40:48,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:40:48,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:40:48,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:40:48,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:40:48,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:40:48,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:48,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 18:40:48,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:48,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 18:40:48,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2021-11-25 18:40:48,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:48,344 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-25 18:40:48,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 188 treesize of output 133 [2021-11-25 18:40:48,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 62 [2021-11-25 18:40:48,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:48,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:40:48,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:48,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:48,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:48,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:48,468 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:40:48,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:40:48,475 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 19 treesize of output 1 [2021-11-25 18:40:48,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:48,510 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:40:48,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 18:40:48,573 INFO L354 Elim1Store]: treesize reduction 32, result has 58.4 percent of original size [2021-11-25 18:40:48,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 66 [2021-11-25 18:40:48,664 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-25 18:40:48,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2021-11-25 18:40:48,716 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-25 18:40:48,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 100 [2021-11-25 18:40:48,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:48,738 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:40:48,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 98 [2021-11-25 18:40:48,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 18:40:48,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:48,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:48,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:48,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:48,842 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:40:48,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 18:40:48,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:48,862 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:40:48,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:40:48,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:49,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:40:49,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:40:49,055 INFO L197 IcfgInterpreter]: Interpreting procedure is_list_containing_x with input of size 21 for LOIs [2021-11-25 18:40:49,066 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:40:50,047 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3376#(and (<= 0 |ULTIMATE.start_main_~tail~0#1.base|) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~#list~0#1.base| |ULTIMATE.start_main_~x~0#1.base|) (<= 0 |ULTIMATE.start_main_~tail~0#1.offset|) (= (mod (+ (* |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 255) 1) 256) 0) (<= 0 |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_main_~x~0#1.base|) (< |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 256) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#list~0#1.base|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start_main_~#list~0#1.offset| 0) (= |ULTIMATE.start_main_~#list~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_remove_~x#1.offset|) (not (= (select |#valid| |ULTIMATE.start_remove_~x#1.base|) 1)) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_remove_~x#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= |ULTIMATE.start_main_~tail~0#1.offset| 0))' at error location [2021-11-25 18:40:50,047 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:40:50,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:40:50,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 12 [2021-11-25 18:40:50,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772850898] [2021-11-25 18:40:50,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:40:50,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 18:40:50,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:50,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 18:40:50,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-25 18:40:50,050 INFO L87 Difference]: Start difference. First operand 120 states and 157 transitions. Second operand has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:40:50,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:50,543 INFO L93 Difference]: Finished difference Result 261 states and 332 transitions. [2021-11-25 18:40:50,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 18:40:50,544 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 16 [2021-11-25 18:40:50,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:50,547 INFO L225 Difference]: With dead ends: 261 [2021-11-25 18:40:50,547 INFO L226 Difference]: Without dead ends: 261 [2021-11-25 18:40:50,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-11-25 18:40:50,548 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 289 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:50,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 480 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 521 Invalid, 0 Unknown, 168 Unchecked, 0.4s Time] [2021-11-25 18:40:50,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-25 18:40:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 129. [2021-11-25 18:40:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 84 states have (on average 1.7023809523809523) internal successors, (143), 112 states have internal predecessors, (143), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2021-11-25 18:40:50,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 171 transitions. [2021-11-25 18:40:50,559 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 171 transitions. Word has length 16 [2021-11-25 18:40:50,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:50,560 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 171 transitions. [2021-11-25 18:40:50,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:40:50,560 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 171 transitions. [2021-11-25 18:40:50,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 18:40:50,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:50,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:50,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:50,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 18:40:50,778 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:40:50,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:50,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2030371261, now seen corresponding path program 1 times [2021-11-25 18:40:50,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:50,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550358416] [2021-11-25 18:40:50,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:50,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:50,924 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 18:40:50,925 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:50,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550358416] [2021-11-25 18:40:50,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550358416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:50,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077881314] [2021-11-25 18:40:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:50,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:50,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:50,927 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:50,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:40:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:51,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 18:40:51,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:51,324 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 18:40:51,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:51,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:40:51,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-11-25 18:40:51,674 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 18:40:51,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077881314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:40:51,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [359154445] [2021-11-25 18:40:51,677 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:40:51,678 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:51,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:51,678 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:51,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:51,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:40:51,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:40:51,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:51,732 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 11 treesize of output 7 [2021-11-25 18:40:51,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:40:51,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:40:51,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:40:51,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:40:51,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:40:51,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:40:51,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:40:51,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:40:51,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:40:51,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:40:52,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:52,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 18:40:52,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:40:52,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:52,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 18:40:52,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2021-11-25 18:40:52,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:52,253 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-25 18:40:52,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 241 treesize of output 180 [2021-11-25 18:40:52,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,280 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:40:52,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 132 [2021-11-25 18:40:52,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:52,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:40:52,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:52,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:52,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:52,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:52,384 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:40:52,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 18:40:52,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:52,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:52,411 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:40:52,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:40:52,457 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-25 18:40:52,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2021-11-25 18:40:52,474 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:40:52,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-11-25 18:40:52,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:52,539 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:40:52,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 55 [2021-11-25 18:40:52,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:52,556 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:40:52,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-11-25 18:40:52,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 18:40:52,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:52,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:52,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:52,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:52,628 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:40:52,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:40:52,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:40:52,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:52,661 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:40:52,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 18:40:52,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:40:52,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:40:52,864 INFO L197 IcfgInterpreter]: Interpreting procedure is_list_containing_x with input of size 18 for LOIs [2021-11-25 18:40:52,874 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:40:53,897 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3903#(and (<= 0 |ULTIMATE.start_main_~tail~0#1.base|) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~#list~0#1.base| |ULTIMATE.start_main_~x~0#1.base|) (<= 0 |ULTIMATE.start_main_~tail~0#1.offset|) (= (mod (+ (* |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 255) 1) 256) 0) (<= 0 |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_main_~x~0#1.base|) (< (select |#length| |ULTIMATE.start_remove_~x#1.base|) (+ 8 |ULTIMATE.start_remove_~x#1.offset|)) (< |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 256) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#list~0#1.base|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start_main_~#list~0#1.offset| 0) (= |ULTIMATE.start_main_~#list~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_remove_~x#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_remove_~x#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= |ULTIMATE.start_main_~tail~0#1.offset| 0))' at error location [2021-11-25 18:40:53,898 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:40:53,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:40:53,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2021-11-25 18:40:53,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516427358] [2021-11-25 18:40:53,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:40:53,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 18:40:53,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:53,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 18:40:53,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-11-25 18:40:53,901 INFO L87 Difference]: Start difference. First operand 129 states and 171 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:40:54,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:54,612 INFO L93 Difference]: Finished difference Result 292 states and 398 transitions. [2021-11-25 18:40:54,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 18:40:54,613 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 16 [2021-11-25 18:40:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:54,616 INFO L225 Difference]: With dead ends: 292 [2021-11-25 18:40:54,616 INFO L226 Difference]: Without dead ends: 292 [2021-11-25 18:40:54,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=203, Invalid=1279, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 18:40:54,618 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 582 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:54,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 716 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 494 Invalid, 0 Unknown, 205 Unchecked, 0.5s Time] [2021-11-25 18:40:54,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-25 18:40:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 135. [2021-11-25 18:40:54,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 91 states have (on average 1.6153846153846154) internal successors, (147), 117 states have internal predecessors, (147), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (17), 11 states have call predecessors, (17), 13 states have call successors, (17) [2021-11-25 18:40:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 177 transitions. [2021-11-25 18:40:54,631 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 177 transitions. Word has length 16 [2021-11-25 18:40:54,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:54,632 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 177 transitions. [2021-11-25 18:40:54,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:40:54,632 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 177 transitions. [2021-11-25 18:40:54,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 18:40:54,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:54,634 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:54,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:54,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 18:40:54,854 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:40:54,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:54,854 INFO L85 PathProgramCache]: Analyzing trace with hash 472269757, now seen corresponding path program 1 times [2021-11-25 18:40:54,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:54,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976765020] [2021-11-25 18:40:54,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:54,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:40:54,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:54,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976765020] [2021-11-25 18:40:54,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976765020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:54,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:54,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:40:54,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389640821] [2021-11-25 18:40:54,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:54,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:40:54,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:54,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:40:54,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:40:54,910 INFO L87 Difference]: Start difference. First operand 135 states and 177 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:40:54,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:54,946 INFO L93 Difference]: Finished difference Result 151 states and 174 transitions. [2021-11-25 18:40:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:40:54,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-25 18:40:54,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:54,949 INFO L225 Difference]: With dead ends: 151 [2021-11-25 18:40:54,949 INFO L226 Difference]: Without dead ends: 151 [2021-11-25 18:40:54,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:40:54,953 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 56 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:54,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 195 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:40:54,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-25 18:40:54,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 132. [2021-11-25 18:40:54,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 90 states have (on average 1.6) internal successors, (144), 114 states have internal predecessors, (144), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-25 18:40:54,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 169 transitions. [2021-11-25 18:40:54,964 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 169 transitions. Word has length 17 [2021-11-25 18:40:54,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:54,965 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 169 transitions. [2021-11-25 18:40:54,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:40:54,965 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 169 transitions. [2021-11-25 18:40:54,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 18:40:54,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:54,971 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:54,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 18:40:54,971 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:40:54,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:54,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1986748576, now seen corresponding path program 1 times [2021-11-25 18:40:54,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:54,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546271315] [2021-11-25 18:40:54,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:54,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:55,090 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 18:40:55,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:55,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546271315] [2021-11-25 18:40:55,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546271315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:55,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:55,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:40:55,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955931434] [2021-11-25 18:40:55,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:55,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:40:55,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:55,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:40:55,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:40:55,093 INFO L87 Difference]: Start difference. First operand 132 states and 169 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:40:55,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:55,302 INFO L93 Difference]: Finished difference Result 153 states and 183 transitions. [2021-11-25 18:40:55,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:40:55,302 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-25 18:40:55,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:55,304 INFO L225 Difference]: With dead ends: 153 [2021-11-25 18:40:55,304 INFO L226 Difference]: Without dead ends: 153 [2021-11-25 18:40:55,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:40:55,305 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 127 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:55,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 319 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:40:55,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-25 18:40:55,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2021-11-25 18:40:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 87 states have (on average 1.5862068965517242) internal successors, (138), 111 states have internal predecessors, (138), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-25 18:40:55,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 163 transitions. [2021-11-25 18:40:55,316 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 163 transitions. Word has length 17 [2021-11-25 18:40:55,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:55,317 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 163 transitions. [2021-11-25 18:40:55,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:40:55,318 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 163 transitions. [2021-11-25 18:40:55,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 18:40:55,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:55,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:55,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 18:40:55,319 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:40:55,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:55,320 INFO L85 PathProgramCache]: Analyzing trace with hash -158970448, now seen corresponding path program 1 times [2021-11-25 18:40:55,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:55,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146410031] [2021-11-25 18:40:55,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:55,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:55,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:55,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146410031] [2021-11-25 18:40:55,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146410031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:55,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691135091] [2021-11-25 18:40:55,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:55,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:55,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:55,893 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:55,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:40:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:56,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-25 18:40:56,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:56,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:40:56,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:56,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-25 18:40:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:56,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:56,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-11-25 18:40:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:56,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691135091] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:40:56,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [327657309] [2021-11-25 18:40:56,449 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:40:56,450 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:56,451 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:40:56,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:40:56,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 23 [2021-11-25 18:40:56,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996605181] [2021-11-25 18:40:56,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:40:56,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 18:40:56,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:56,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 18:40:56,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:40:56,457 INFO L87 Difference]: Start difference. First operand 129 states and 163 transitions. Second operand has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 19 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:58,474 INFO L93 Difference]: Finished difference Result 239 states and 287 transitions. [2021-11-25 18:40:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 18:40:58,475 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 19 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-25 18:40:58,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:58,477 INFO L225 Difference]: With dead ends: 239 [2021-11-25 18:40:58,478 INFO L226 Difference]: Without dead ends: 239 [2021-11-25 18:40:58,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=191, Invalid=1215, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 18:40:58,480 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 259 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:58,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 1182 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1365 Invalid, 0 Unknown, 101 Unchecked, 1.1s Time] [2021-11-25 18:40:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-25 18:40:58,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 183. [2021-11-25 18:40:58,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 130 states have (on average 1.5461538461538462) internal successors, (201), 156 states have internal predecessors, (201), 17 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (23), 16 states have call predecessors, (23), 17 states have call successors, (23) [2021-11-25 18:40:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 241 transitions. [2021-11-25 18:40:58,496 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 241 transitions. Word has length 19 [2021-11-25 18:40:58,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:58,496 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 241 transitions. [2021-11-25 18:40:58,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 19 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 241 transitions. [2021-11-25 18:40:58,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 18:40:58,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:58,498 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:58,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:58,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 18:40:58,706 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:40:58,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:58,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1801700008, now seen corresponding path program 1 times [2021-11-25 18:40:58,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:58,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391133033] [2021-11-25 18:40:58,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:58,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:58,822 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 18:40:58,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:58,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391133033] [2021-11-25 18:40:58,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391133033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:58,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931887598] [2021-11-25 18:40:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:58,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:58,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:58,826 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:58,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:40:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:58,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 18:40:58,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:59,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:40:59,404 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 18:40:59,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:59,746 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 14 treesize of output 12 [2021-11-25 18:40:59,754 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 18:40:59,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931887598] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:40:59,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915769472] [2021-11-25 18:40:59,758 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:40:59,758 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:59,759 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:59,759 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:59,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:59,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:40:59,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:59,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:59,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:40:59,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:40:59,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:40:59,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:40:59,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:40:59,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:40:59,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:40:59,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:41:00,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:41:00,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:41:00,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:41:00,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:00,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 18:41:00,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:00,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 18:41:00,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:41:00,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2021-11-25 18:41:00,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:00,265 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-25 18:41:00,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 188 treesize of output 133 [2021-11-25 18:41:00,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 62 [2021-11-25 18:41:00,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:41:00,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:00,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:00,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:00,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:00,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:00,410 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:41:00,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 18:41:00,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:00,476 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:41:00,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:41:00,578 INFO L354 Elim1Store]: treesize reduction 32, result has 58.4 percent of original size [2021-11-25 18:41:00,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 58 [2021-11-25 18:41:00,692 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-25 18:41:00,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2021-11-25 18:41:00,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:41:00,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:00,750 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:41:00,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 98 [2021-11-25 18:41:00,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:00,771 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:41:00,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-11-25 18:41:00,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:00,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:00,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:00,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:00,860 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:41:00,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:41:00,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:00,890 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:41:00,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 18:41:00,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:01,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:41:01,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:41:01,100 INFO L197 IcfgInterpreter]: Interpreting procedure is_list_containing_x with input of size 21 for LOIs [2021-11-25 18:41:01,127 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:41:01,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [915769472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:41:01,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:41:01,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [8, 9, 8] total 31 [2021-11-25 18:41:01,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302708209] [2021-11-25 18:41:01,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:41:01,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 18:41:01,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:01,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 18:41:01,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-11-25 18:41:01,825 INFO L87 Difference]: Start difference. First operand 183 states and 241 transitions. Second operand has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 11 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:41:02,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:02,795 INFO L93 Difference]: Finished difference Result 213 states and 261 transitions. [2021-11-25 18:41:02,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 18:41:02,795 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 11 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-25 18:41:02,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:02,798 INFO L225 Difference]: With dead ends: 213 [2021-11-25 18:41:02,798 INFO L226 Difference]: Without dead ends: 211 [2021-11-25 18:41:02,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 18:41:02,799 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 154 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:02,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 225 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 18:41:02,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-25 18:41:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 183. [2021-11-25 18:41:02,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 130 states have (on average 1.5461538461538462) internal successors, (201), 156 states have internal predecessors, (201), 17 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (23), 16 states have call predecessors, (23), 17 states have call successors, (23) [2021-11-25 18:41:02,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 241 transitions. [2021-11-25 18:41:02,813 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 241 transitions. Word has length 18 [2021-11-25 18:41:02,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:02,813 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 241 transitions. [2021-11-25 18:41:02,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 11 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:41:02,814 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 241 transitions. [2021-11-25 18:41:02,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 18:41:02,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:02,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:02,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-25 18:41:03,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 18:41:03,038 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:41:03,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:03,039 INFO L85 PathProgramCache]: Analyzing trace with hash -130356238, now seen corresponding path program 1 times [2021-11-25 18:41:03,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:03,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190088665] [2021-11-25 18:41:03,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:03,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:03,104 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 18:41:03,105 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:03,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190088665] [2021-11-25 18:41:03,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190088665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:41:03,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:41:03,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:41:03,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053230907] [2021-11-25 18:41:03,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:41:03,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:41:03,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:03,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:41:03,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:41:03,108 INFO L87 Difference]: Start difference. First operand 183 states and 241 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:41:03,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:03,166 INFO L93 Difference]: Finished difference Result 193 states and 253 transitions. [2021-11-25 18:41:03,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:41:03,166 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-25 18:41:03,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:03,168 INFO L225 Difference]: With dead ends: 193 [2021-11-25 18:41:03,169 INFO L226 Difference]: Without dead ends: 193 [2021-11-25 18:41:03,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:41:03,170 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 6 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:03,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 300 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:41:03,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-25 18:41:03,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2021-11-25 18:41:03,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 133 states have (on average 1.5338345864661653) internal successors, (204), 162 states have internal predecessors, (204), 20 states have call successors, (20), 11 states have call predecessors, (20), 13 states have return successors, (26), 16 states have call predecessors, (26), 20 states have call successors, (26) [2021-11-25 18:41:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 250 transitions. [2021-11-25 18:41:03,197 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 250 transitions. Word has length 20 [2021-11-25 18:41:03,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:03,200 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 250 transitions. [2021-11-25 18:41:03,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:41:03,200 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 250 transitions. [2021-11-25 18:41:03,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 18:41:03,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:03,203 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:03,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 18:41:03,203 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:41:03,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:03,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2029912448, now seen corresponding path program 1 times [2021-11-25 18:41:03,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:03,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838798037] [2021-11-25 18:41:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:03,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:03,648 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 18:41:03,649 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:03,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838798037] [2021-11-25 18:41:03,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838798037] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:41:03,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747778270] [2021-11-25 18:41:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:03,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:03,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:03,650 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:41:03,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:41:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:03,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-25 18:41:03,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:41:03,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:41:03,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:04,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-25 18:41:04,136 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 18:41:04,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:41:04,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-11-25 18:41:04,483 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 18:41:04,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747778270] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:41:04,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [125435511] [2021-11-25 18:41:04,486 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-25 18:41:04,486 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:41:04,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:41:04,487 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:41:04,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:41:04,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:41:04,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:41:04,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:41:04,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:41:04,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:41:04,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:41:04,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:41:04,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:41:04,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:41:04,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:41:04,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:41:04,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:41:04,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:41:04,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:41:04,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:04,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 18:41:04,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:04,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 18:41:04,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:41:04,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2021-11-25 18:41:04,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,979 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:41:04,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 119 [2021-11-25 18:41:04,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:04,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:05,013 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-25 18:41:05,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 188 treesize of output 133 [2021-11-25 18:41:05,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:05,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:41:05,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:05,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:05,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:05,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:05,145 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:41:05,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 18:41:05,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:05,169 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:41:05,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:41:05,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:05,314 INFO L354 Elim1Store]: treesize reduction 32, result has 58.4 percent of original size [2021-11-25 18:41:05,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 66 [2021-11-25 18:41:05,414 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-25 18:41:05,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2021-11-25 18:41:05,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:41:05,497 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-25 18:41:05,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 194 [2021-11-25 18:41:05,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:05,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:05,515 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:41:05,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 197 [2021-11-25 18:41:05,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:05,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:05,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:05,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:05,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:05,631 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:41:05,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:41:05,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:05,655 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:41:05,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 18:41:05,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:41:05,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:41:05,972 INFO L197 IcfgInterpreter]: Interpreting procedure is_list_containing_x with input of size 21 for LOIs [2021-11-25 18:41:05,983 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:41:08,134 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6589#(and (<= 0 |ULTIMATE.start_main_~tail~0#1.base|) (= (select |#valid| |ULTIMATE.start_remove_~x#1.base|) 1) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~#list~0#1.base| |ULTIMATE.start_main_~x~0#1.base|) (= |ULTIMATE.start_remove_#t~mem4#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) (<= (+ 8 |ULTIMATE.start_remove_~x#1.offset|) (select |#length| |ULTIMATE.start_remove_~x#1.base|)) (<= 0 |ULTIMATE.start_main_~tail~0#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_main_~x~0#1.base|) (< |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 256) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) |ULTIMATE.start_remove_#t~mem4#1.offset|) (<= |#NULL.offset| 0) (= (mod (+ 255 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (- 256)) 0) (<= 0 |ULTIMATE.start_main_~#list~0#1.base|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) |ULTIMATE.start_remove_#t~mem5#1.base|) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_remove_~x#1.offset|) (<= |ULTIMATE.start_main_~#list~0#1.offset| 0) (= |ULTIMATE.start_remove_#t~mem5#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|)) (= |ULTIMATE.start_main_~#list~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_remove_~x#1.offset|) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) 0))) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_remove_~x#1.base|) (not (= (select |#valid| |ULTIMATE.start_remove_#t~mem4#1.base|) 1)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= |ULTIMATE.start_main_~tail~0#1.offset| 0))' at error location [2021-11-25 18:41:08,135 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:41:08,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:41:08,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 26 [2021-11-25 18:41:08,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250331535] [2021-11-25 18:41:08,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:41:08,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 18:41:08,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:08,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 18:41:08,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1660, Unknown=0, NotChecked=0, Total=1806 [2021-11-25 18:41:08,137 INFO L87 Difference]: Start difference. First operand 190 states and 250 transitions. Second operand has 27 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:41:10,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:10,108 INFO L93 Difference]: Finished difference Result 278 states and 360 transitions. [2021-11-25 18:41:10,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 18:41:10,109 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2021-11-25 18:41:10,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:10,113 INFO L225 Difference]: With dead ends: 278 [2021-11-25 18:41:10,113 INFO L226 Difference]: Without dead ends: 278 [2021-11-25 18:41:10,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=274, Invalid=2806, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 18:41:10,116 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 395 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:10,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 778 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1605 Invalid, 0 Unknown, 181 Unchecked, 1.2s Time] [2021-11-25 18:41:10,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-25 18:41:10,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 191. [2021-11-25 18:41:10,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 134 states have (on average 1.537313432835821) internal successors, (206), 163 states have internal predecessors, (206), 20 states have call successors, (20), 11 states have call predecessors, (20), 13 states have return successors, (26), 16 states have call predecessors, (26), 20 states have call successors, (26) [2021-11-25 18:41:10,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 252 transitions. [2021-11-25 18:41:10,129 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 252 transitions. Word has length 20 [2021-11-25 18:41:10,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:10,130 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 252 transitions. [2021-11-25 18:41:10,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:41:10,130 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 252 transitions. [2021-11-25 18:41:10,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 18:41:10,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:10,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:10,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:41:10,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:10,358 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:41:10,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:10,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2029912447, now seen corresponding path program 1 times [2021-11-25 18:41:10,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:10,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578022664] [2021-11-25 18:41:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:10,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:10,832 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 18:41:10,832 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:10,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578022664] [2021-11-25 18:41:10,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578022664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:41:10,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799369821] [2021-11-25 18:41:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:10,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:10,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:10,833 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:41:10,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:41:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:10,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-25 18:41:10,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:41:10,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:41:11,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:11,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:11,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-25 18:41:11,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 18:41:11,371 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 18:41:11,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:41:11,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 72 [2021-11-25 18:41:11,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 106 [2021-11-25 18:41:11,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,005 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 18:41:12,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799369821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:41:12,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [873164265] [2021-11-25 18:41:12,008 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-25 18:41:12,008 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:41:12,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:41:12,009 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:41:12,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:41:12,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:41:12,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:41:12,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:41:12,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:41:12,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:41:12,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:41:12,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:41:12,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:41:12,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:41:12,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:41:12,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:41:12,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:41:12,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:41:12,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:41:12,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:41:12,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:12,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 18:41:12,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:12,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 18:41:12,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 60 [2021-11-25 18:41:12,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:41:12,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:12,515 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-25 18:41:12,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 167 [2021-11-25 18:41:12,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,540 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:41:12,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 119 [2021-11-25 18:41:12,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:12,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:12,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:12,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:12,624 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:41:12,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:41:12,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:12,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:12,655 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:41:12,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 18:41:12,708 INFO L354 Elim1Store]: treesize reduction 32, result has 58.4 percent of original size [2021-11-25 18:41:12,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 58 [2021-11-25 18:41:12,796 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-25 18:41:12,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2021-11-25 18:41:12,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:12,838 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:41:12,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-11-25 18:41:12,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:12,856 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:41:12,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 67 [2021-11-25 18:41:12,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 18:41:12,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:12,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:12,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:12,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:12,978 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:41:12,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 18:41:12,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:13,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:13,012 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:41:13,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:41:13,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:41:13,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:41:13,237 INFO L197 IcfgInterpreter]: Interpreting procedure is_list_containing_x with input of size 18 for LOIs [2021-11-25 18:41:13,246 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:41:15,589 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7248#(and (<= 0 |ULTIMATE.start_main_~tail~0#1.base|) (= (select |#valid| |ULTIMATE.start_remove_~x#1.base|) 1) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~#list~0#1.base| |ULTIMATE.start_main_~x~0#1.base|) (= |ULTIMATE.start_remove_#t~mem4#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) (<= (+ 8 |ULTIMATE.start_remove_~x#1.offset|) (select |#length| |ULTIMATE.start_remove_~x#1.base|)) (<= 0 |ULTIMATE.start_main_~tail~0#1.offset|) (= (mod (+ (* |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 255) 1) 256) 0) (or (< (select |#length| |ULTIMATE.start_remove_#t~mem4#1.base|) (+ |ULTIMATE.start_remove_#t~mem4#1.offset| 4)) (< |ULTIMATE.start_remove_#t~mem4#1.offset| 0)) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_main_~x~0#1.base|) (< |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 256) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) |ULTIMATE.start_remove_#t~mem4#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#list~0#1.base|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) |ULTIMATE.start_remove_#t~mem5#1.base|) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_remove_~x#1.offset|) (<= |ULTIMATE.start_main_~#list~0#1.offset| 0) (= |ULTIMATE.start_remove_#t~mem5#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|)) (= |ULTIMATE.start_main_~#list~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_remove_~x#1.offset|) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) 0))) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_remove_~x#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= |ULTIMATE.start_main_~tail~0#1.offset| 0))' at error location [2021-11-25 18:41:15,589 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:41:15,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:41:15,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 30 [2021-11-25 18:41:15,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231090424] [2021-11-25 18:41:15,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:41:15,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 18:41:15,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:15,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 18:41:15,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2005, Unknown=0, NotChecked=0, Total=2162 [2021-11-25 18:41:15,592 INFO L87 Difference]: Start difference. First operand 191 states and 252 transitions. Second operand has 31 states, 30 states have (on average 1.7) internal successors, (51), 27 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:41:18,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:18,485 INFO L93 Difference]: Finished difference Result 321 states and 413 transitions. [2021-11-25 18:41:18,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 18:41:18,490 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7) internal successors, (51), 27 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2021-11-25 18:41:18,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:18,493 INFO L225 Difference]: With dead ends: 321 [2021-11-25 18:41:18,493 INFO L226 Difference]: Without dead ends: 321 [2021-11-25 18:41:18,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=352, Invalid=3808, Unknown=0, NotChecked=0, Total=4160 [2021-11-25 18:41:18,496 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 522 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 2854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:18,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 1477 Invalid, 2854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2311 Invalid, 0 Unknown, 414 Unchecked, 1.6s Time] [2021-11-25 18:41:18,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-25 18:41:18,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 191. [2021-11-25 18:41:18,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 134 states have (on average 1.5298507462686568) internal successors, (205), 163 states have internal predecessors, (205), 20 states have call successors, (20), 11 states have call predecessors, (20), 13 states have return successors, (26), 16 states have call predecessors, (26), 20 states have call successors, (26) [2021-11-25 18:41:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 251 transitions. [2021-11-25 18:41:18,511 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 251 transitions. Word has length 20 [2021-11-25 18:41:18,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:18,511 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 251 transitions. [2021-11-25 18:41:18,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7) internal successors, (51), 27 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:41:18,512 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 251 transitions. [2021-11-25 18:41:18,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 18:41:18,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:18,513 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:18,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:41:18,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-25 18:41:18,726 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:41:18,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:18,726 INFO L85 PathProgramCache]: Analyzing trace with hash -474693630, now seen corresponding path program 1 times [2021-11-25 18:41:18,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:18,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807945436] [2021-11-25 18:41:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:18,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:18,968 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 18:41:18,968 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:18,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807945436] [2021-11-25 18:41:18,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807945436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:41:18,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941365887] [2021-11-25 18:41:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:18,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:18,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:18,970 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:41:18,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:41:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:19,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-25 18:41:19,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:41:19,146 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 18:41:19,153 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 18:41:19,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 18:41:19,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 18:41:19,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:41:19,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:19,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-11-25 18:41:19,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:19,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-11-25 18:41:19,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:19,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-11-25 18:41:19,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:19,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-11-25 18:41:19,484 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-25 18:41:19,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 40 [2021-11-25 18:41:19,515 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-25 18:41:19,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 40 [2021-11-25 18:41:22,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-11-25 18:41:22,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:22,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-11-25 18:41:22,759 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 18:41:22,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:41:25,350 WARN L838 $PredicateComparison]: unable to prove that (and (or (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int)) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~tail~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) |c_ULTIMATE.start_main_~n~0#1.base|)) |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|))) (or (= (select |c_#valid| .cse0) 1) (and (forall ((v_ArrVal_856 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~tail~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) v_ArrVal_856)) |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) 0)) (= .cse0 0))))) (not (= |c_ULTIMATE.start_main_~n~0#1.base| |c_ULTIMATE.start_main_~#list~0#1.base|))) (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int)) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~tail~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) |c_ULTIMATE.start_main_~n~0#1.base|)) |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (or (and (forall ((v_ArrVal_856 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~tail~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) v_ArrVal_856)) |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) 0)) (= .cse1 0)) (= (select |c_#valid| .cse1) 1))))) is different from false [2021-11-25 18:41:29,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:29,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 247 treesize of output 252 [2021-11-25 18:41:31,418 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~n~0#1.base_40| Int)) (or (and (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (v_prenex_1 Int) (v_prenex_3 (Array Int Int)) (v_ArrVal_852 (Array Int Int))) (let ((.cse2 (select (select (let ((.cse5 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~n~0#1.base_40| v_ArrVal_852))) (store .cse5 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse5 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) |v_ULTIMATE.start_main_~n~0#1.base_40|))) |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)) (.cse0 (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~n~0#1.base_40| v_prenex_3))) (store .cse4 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse4 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ v_prenex_1 4) |v_ULTIMATE.start_main_~n~0#1.base_40|))) |c_ULTIMATE.start_main_~#list~0#1.base|) 0))) (or (and (or (and (= .cse0 0) (forall ((v_prenex_2 Int) (v_prenex_4 (Array Int Int))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~n~0#1.base_40| v_prenex_4))) (store .cse1 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ v_prenex_1 4) v_prenex_2))) |c_ULTIMATE.start_main_~#list~0#1.base|) 0) 0))) (= |v_ULTIMATE.start_main_~n~0#1.base_40| .cse0) (not (= |c_ULTIMATE.start_main_~#list~0#1.base| |v_ULTIMATE.start_main_~n~0#1.base_40|))) (or (and (= .cse2 0) (forall ((v_ArrVal_856 Int) (v_ArrVal_851 (Array Int Int))) (= (select (select (let ((.cse3 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~n~0#1.base_40| v_ArrVal_851))) (store .cse3 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) v_ArrVal_856))) |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) 0))) (= .cse2 |v_ULTIMATE.start_main_~n~0#1.base_40|))) (= .cse2 .cse0)))) (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (v_ArrVal_852 (Array Int Int))) (let ((.cse6 (select (select (let ((.cse8 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~n~0#1.base_40| v_ArrVal_852))) (store .cse8 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse8 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) |v_ULTIMATE.start_main_~n~0#1.base_40|))) |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (or (and (= .cse6 0) (forall ((v_ArrVal_856 Int) (v_ArrVal_851 (Array Int Int))) (= (select (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~n~0#1.base_40| v_ArrVal_851))) (store .cse7 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse7 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) v_ArrVal_856))) |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) 0))) (= .cse6 |v_ULTIMATE.start_main_~n~0#1.base_40|)))) (or (forall ((v_prenex_1 Int) (v_prenex_3 (Array Int Int))) (let ((.cse9 (select (select (let ((.cse11 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~n~0#1.base_40| v_prenex_3))) (store .cse11 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse11 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ v_prenex_1 4) |v_ULTIMATE.start_main_~n~0#1.base_40|))) |c_ULTIMATE.start_main_~#list~0#1.base|) 0))) (or (and (= .cse9 0) (forall ((v_prenex_2 Int) (v_prenex_4 (Array Int Int))) (= (select (select (let ((.cse10 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~n~0#1.base_40| v_prenex_4))) (store .cse10 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse10 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ v_prenex_1 4) v_prenex_2))) |c_ULTIMATE.start_main_~#list~0#1.base|) 0) 0))) (= |v_ULTIMATE.start_main_~n~0#1.base_40| .cse9)))) (not (= |c_ULTIMATE.start_main_~#list~0#1.base| |v_ULTIMATE.start_main_~n~0#1.base_40|)))) (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_main_~n~0#1.base_40|))) is different from false [2021-11-25 18:41:31,608 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 51 treesize of output 47 [2021-11-25 18:41:31,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:31,617 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 26 treesize of output 24 [2021-11-25 18:41:34,337 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~n~0#1.base_40| Int)) (or (and (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (v_prenex_1 Int) (v_prenex_3 (Array Int Int)) (v_ArrVal_852 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4) 0)))) (let ((.cse0 (select (store (select (store .cse2 |v_ULTIMATE.start_main_~n~0#1.base_40| v_ArrVal_852) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) |v_ULTIMATE.start_main_~n~0#1.base_40|) |c_ULTIMATE.start_main_~#list~0#1.offset|)) (.cse1 (select (store (select (store .cse2 |v_ULTIMATE.start_main_~n~0#1.base_40| v_prenex_3) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ v_prenex_1 4) |v_ULTIMATE.start_main_~n~0#1.base_40|) 0))) (or (and (or (= |v_ULTIMATE.start_main_~n~0#1.base_40| .cse0) (and (= .cse0 0) (forall ((v_ArrVal_856 Int) (v_ArrVal_851 (Array Int Int))) (= (select (store (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4) 0)) |v_ULTIMATE.start_main_~n~0#1.base_40| v_ArrVal_851) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) v_ArrVal_856) |c_ULTIMATE.start_main_~#list~0#1.offset|) 0)))) (or (and (= .cse1 0) (forall ((v_prenex_2 Int) (v_prenex_4 (Array Int Int))) (= (select (store (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4) 0)) |v_ULTIMATE.start_main_~n~0#1.base_40| v_prenex_4) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ v_prenex_1 4) v_prenex_2) 0) 0))) (not (= |c_ULTIMATE.start_main_~#list~0#1.base| |v_ULTIMATE.start_main_~n~0#1.base_40|)) (= |v_ULTIMATE.start_main_~n~0#1.base_40| .cse1))) (= .cse0 .cse1))))) (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (v_ArrVal_852 (Array Int Int))) (let ((.cse3 (select (store (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4) 0)) |v_ULTIMATE.start_main_~n~0#1.base_40| v_ArrVal_852) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) |v_ULTIMATE.start_main_~n~0#1.base_40|) |c_ULTIMATE.start_main_~#list~0#1.offset|))) (or (= |v_ULTIMATE.start_main_~n~0#1.base_40| .cse3) (and (= .cse3 0) (forall ((v_ArrVal_856 Int) (v_ArrVal_851 (Array Int Int))) (= (select (store (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4) 0)) |v_ULTIMATE.start_main_~n~0#1.base_40| v_ArrVal_851) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) v_ArrVal_856) |c_ULTIMATE.start_main_~#list~0#1.offset|) 0)))))) (or (forall ((v_prenex_1 Int) (v_prenex_3 (Array Int Int))) (let ((.cse4 (select (store (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4) 0)) |v_ULTIMATE.start_main_~n~0#1.base_40| v_prenex_3) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ v_prenex_1 4) |v_ULTIMATE.start_main_~n~0#1.base_40|) 0))) (or (and (= .cse4 0) (forall ((v_prenex_2 Int) (v_prenex_4 (Array Int Int))) (= (select (store (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4) 0)) |v_ULTIMATE.start_main_~n~0#1.base_40| v_prenex_4) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ v_prenex_1 4) v_prenex_2) 0) 0))) (= |v_ULTIMATE.start_main_~n~0#1.base_40| .cse4)))) (not (= |c_ULTIMATE.start_main_~#list~0#1.base| |v_ULTIMATE.start_main_~n~0#1.base_40|)))) (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_main_~n~0#1.base_40|))) is different from false [2021-11-25 18:41:34,438 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-25 18:41:34,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 408 treesize of output 297 [2021-11-25 18:41:34,481 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-25 18:41:34,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 263 [2021-11-25 18:41:34,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 331 treesize of output 319 [2021-11-25 18:41:34,543 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-11-25 18:41:34,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 367 treesize of output 371 [2021-11-25 18:41:34,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 581 treesize of output 553 [2021-11-25 18:41:34,641 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-11-25 18:41:34,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 658 treesize of output 646 [2021-11-25 18:41:34,709 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 544 treesize of output 542 [2021-11-25 18:41:34,726 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 600 treesize of output 590 [2021-11-25 18:41:34,762 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 588 treesize of output 586 [2021-11-25 18:41:34,780 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 646 treesize of output 634 [2021-11-25 18:41:34,820 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 625 treesize of output 623 [2021-11-25 18:41:34,839 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 642 treesize of output 638 [2021-11-25 18:41:34,875 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 643 treesize of output 641 [2021-11-25 18:41:34,894 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 661 treesize of output 657 [2021-11-25 18:41:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-25 18:41:35,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941365887] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:41:35,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1278800953] [2021-11-25 18:41:35,096 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-25 18:41:35,096 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:41:35,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:41:35,097 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:41:35,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:41:35,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:41:35,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:41:35,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:41:35,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:41:35,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:41:35,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:41:35,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:41:35,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:41:35,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:41:35,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:41:35,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:41:35,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:41:35,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:41:35,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:41:35,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:35,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 18:41:35,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:41:35,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:35,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 18:41:35,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 54 [2021-11-25 18:41:35,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:41:35,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:35,606 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-25 18:41:35,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 188 treesize of output 133 [2021-11-25 18:41:35,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 62 [2021-11-25 18:41:35,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:35,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:35,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:35,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:35,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:35,745 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:41:35,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 18:41:35,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:35,773 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:41:35,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:41:35,914 INFO L354 Elim1Store]: treesize reduction 32, result has 58.4 percent of original size [2021-11-25 18:41:35,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 66 [2021-11-25 18:41:36,027 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-25 18:41:36,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2021-11-25 18:41:36,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:41:36,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:36,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:36,113 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:41:36,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 172 [2021-11-25 18:41:36,132 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-25 18:41:36,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 145 [2021-11-25 18:41:36,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:36,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:36,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:36,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:36,217 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:41:36,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:41:36,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:36,237 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:41:36,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 18:41:36,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:41:36,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:41:36,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:41:36,575 INFO L197 IcfgInterpreter]: Interpreting procedure is_list_containing_x with input of size 21 for LOIs [2021-11-25 18:41:36,586 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:41:40,053 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7975#(and (not (= (select |#valid| |ULTIMATE.start_remove_#t~mem7#1.base|) 1)) (<= 0 |ULTIMATE.start_main_~tail~0#1.base|) (= (select |#valid| |ULTIMATE.start_remove_~x#1.base|) 1) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~#list~0#1.base| |ULTIMATE.start_main_~x~0#1.base|) (<= (+ 8 |ULTIMATE.start_remove_~x#1.offset|) (select |#length| |ULTIMATE.start_remove_~x#1.base|)) (<= 0 |ULTIMATE.start_main_~tail~0#1.offset|) (= (mod (+ (* |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 255) 1) 256) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) 0) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_main_~x~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) |ULTIMATE.start_remove_#t~mem8#1.offset|) (< |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 256) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#list~0#1.base|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_remove_~x#1.offset|) (<= |ULTIMATE.start_main_~#list~0#1.offset| 0) (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) 0))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) |ULTIMATE.start_remove_#t~mem7#1.base|) (= |ULTIMATE.start_main_~#list~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_remove_~x#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_remove_~x#1.base|) (= |ULTIMATE.start_remove_#t~mem7#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|)) (= |ULTIMATE.start_remove_#t~mem8#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= |ULTIMATE.start_main_~tail~0#1.offset| 0))' at error location [2021-11-25 18:41:40,053 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:41:40,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:41:40,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 14] total 36 [2021-11-25 18:41:40,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007081850] [2021-11-25 18:41:40,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:41:40,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 18:41:40,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:40,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 18:41:40,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2364, Unknown=5, NotChecked=300, Total=2862 [2021-11-25 18:41:40,056 INFO L87 Difference]: Start difference. First operand 191 states and 251 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:41:42,080 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~#list~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~n~0#1.base_40| Int)) (or (and (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (v_prenex_1 Int) (v_prenex_3 (Array Int Int)) (v_ArrVal_852 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4) 0)))) (let ((.cse0 (select (store (select (store .cse2 |v_ULTIMATE.start_main_~n~0#1.base_40| v_ArrVal_852) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) |v_ULTIMATE.start_main_~n~0#1.base_40|) |c_ULTIMATE.start_main_~#list~0#1.offset|)) (.cse1 (select (store (select (store .cse2 |v_ULTIMATE.start_main_~n~0#1.base_40| v_prenex_3) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ v_prenex_1 4) |v_ULTIMATE.start_main_~n~0#1.base_40|) 0))) (or (and (or (= |v_ULTIMATE.start_main_~n~0#1.base_40| .cse0) (and (= .cse0 0) (forall ((v_ArrVal_856 Int) (v_ArrVal_851 (Array Int Int))) (= (select (store (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4) 0)) |v_ULTIMATE.start_main_~n~0#1.base_40| v_ArrVal_851) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) v_ArrVal_856) |c_ULTIMATE.start_main_~#list~0#1.offset|) 0)))) (or (and (= .cse1 0) (forall ((v_prenex_2 Int) (v_prenex_4 (Array Int Int))) (= (select (store (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4) 0)) |v_ULTIMATE.start_main_~n~0#1.base_40| v_prenex_4) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ v_prenex_1 4) v_prenex_2) 0) 0))) (not (= |c_ULTIMATE.start_main_~#list~0#1.base| |v_ULTIMATE.start_main_~n~0#1.base_40|)) (= |v_ULTIMATE.start_main_~n~0#1.base_40| .cse1))) (= .cse0 .cse1))))) (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (v_ArrVal_852 (Array Int Int))) (let ((.cse3 (select (store (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4) 0)) |v_ULTIMATE.start_main_~n~0#1.base_40| v_ArrVal_852) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) |v_ULTIMATE.start_main_~n~0#1.base_40|) |c_ULTIMATE.start_main_~#list~0#1.offset|))) (or (= |v_ULTIMATE.start_main_~n~0#1.base_40| .cse3) (and (= .cse3 0) (forall ((v_ArrVal_856 Int) (v_ArrVal_851 (Array Int Int))) (= (select (store (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4) 0)) |v_ULTIMATE.start_main_~n~0#1.base_40| v_ArrVal_851) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) v_ArrVal_856) |c_ULTIMATE.start_main_~#list~0#1.offset|) 0)))))) (or (forall ((v_prenex_1 Int) (v_prenex_3 (Array Int Int))) (let ((.cse4 (select (store (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4) 0)) |v_ULTIMATE.start_main_~n~0#1.base_40| v_prenex_3) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ v_prenex_1 4) |v_ULTIMATE.start_main_~n~0#1.base_40|) 0))) (or (and (= .cse4 0) (forall ((v_prenex_2 Int) (v_prenex_4 (Array Int Int))) (= (select (store (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4) 0)) |v_ULTIMATE.start_main_~n~0#1.base_40| v_prenex_4) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ v_prenex_1 4) v_prenex_2) 0) 0))) (= |v_ULTIMATE.start_main_~n~0#1.base_40| .cse4)))) (not (= |c_ULTIMATE.start_main_~#list~0#1.base| |v_ULTIMATE.start_main_~n~0#1.base_40|)))) (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_main_~n~0#1.base_40|))) (= (select |c_#valid| |c_ULTIMATE.start_main_~#list~0#1.base|) 1) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~#list~0#1.offset|) 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~#list~0#1.offset|) 0) (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#list~0#1.base|)) is different from false [2021-11-25 18:41:44,087 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base|)) (.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0#1.base|))) (and (= (select .cse0 0) 0) (not (= (+ |c_ULTIMATE.start_main_~tail~0#1.offset| 4) |c_ULTIMATE.start_main_~#list~0#1.offset|)) (= (select .cse0 4) 0) (= (select |c_#valid| |c_ULTIMATE.start_main_~#list~0#1.base|) 1) (= |c_ULTIMATE.start_main_~x~0#1.offset| 0) (= (select .cse1 |c_ULTIMATE.start_main_~#list~0#1.offset|) 0) (forall ((|v_ULTIMATE.start_main_~n~0#1.base_40| Int)) (or (and (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (v_prenex_1 Int) (v_prenex_3 (Array Int Int)) (v_ArrVal_852 (Array Int Int))) (let ((.cse4 (select (select (let ((.cse7 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~n~0#1.base_40| v_ArrVal_852))) (store .cse7 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse7 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) |v_ULTIMATE.start_main_~n~0#1.base_40|))) |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)) (.cse2 (select (select (let ((.cse6 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~n~0#1.base_40| v_prenex_3))) (store .cse6 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse6 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ v_prenex_1 4) |v_ULTIMATE.start_main_~n~0#1.base_40|))) |c_ULTIMATE.start_main_~#list~0#1.base|) 0))) (or (and (or (and (= .cse2 0) (forall ((v_prenex_2 Int) (v_prenex_4 (Array Int Int))) (= (select (select (let ((.cse3 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~n~0#1.base_40| v_prenex_4))) (store .cse3 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ v_prenex_1 4) v_prenex_2))) |c_ULTIMATE.start_main_~#list~0#1.base|) 0) 0))) (= |v_ULTIMATE.start_main_~n~0#1.base_40| .cse2) (not (= |c_ULTIMATE.start_main_~#list~0#1.base| |v_ULTIMATE.start_main_~n~0#1.base_40|))) (or (and (= .cse4 0) (forall ((v_ArrVal_856 Int) (v_ArrVal_851 (Array Int Int))) (= (select (select (let ((.cse5 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~n~0#1.base_40| v_ArrVal_851))) (store .cse5 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse5 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) v_ArrVal_856))) |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) 0))) (= .cse4 |v_ULTIMATE.start_main_~n~0#1.base_40|))) (= .cse4 .cse2)))) (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (v_ArrVal_852 (Array Int Int))) (let ((.cse8 (select (select (let ((.cse10 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~n~0#1.base_40| v_ArrVal_852))) (store .cse10 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse10 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) |v_ULTIMATE.start_main_~n~0#1.base_40|))) |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (or (and (= .cse8 0) (forall ((v_ArrVal_856 Int) (v_ArrVal_851 (Array Int Int))) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~n~0#1.base_40| v_ArrVal_851))) (store .cse9 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse9 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) v_ArrVal_856))) |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) 0))) (= .cse8 |v_ULTIMATE.start_main_~n~0#1.base_40|)))) (or (forall ((v_prenex_1 Int) (v_prenex_3 (Array Int Int))) (let ((.cse11 (select (select (let ((.cse13 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~n~0#1.base_40| v_prenex_3))) (store .cse13 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse13 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ v_prenex_1 4) |v_ULTIMATE.start_main_~n~0#1.base_40|))) |c_ULTIMATE.start_main_~#list~0#1.base|) 0))) (or (and (= .cse11 0) (forall ((v_prenex_2 Int) (v_prenex_4 (Array Int Int))) (= (select (select (let ((.cse12 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~n~0#1.base_40| v_prenex_4))) (store .cse12 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse12 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ v_prenex_1 4) v_prenex_2))) |c_ULTIMATE.start_main_~#list~0#1.base|) 0) 0))) (= |v_ULTIMATE.start_main_~n~0#1.base_40| .cse11)))) (not (= |c_ULTIMATE.start_main_~#list~0#1.base| |v_ULTIMATE.start_main_~n~0#1.base_40|)))) (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_main_~n~0#1.base_40|))) (= (select .cse0 |c_ULTIMATE.start_main_~#list~0#1.offset|) 0) (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#list~0#1.base|) (= |c_ULTIMATE.start_main_~#list~0#1.base| |c_ULTIMATE.start_main_~tail~0#1.base|) (= (select .cse1 0) 0) (= (select .cse1 4) 0))) is different from false [2021-11-25 18:42:06,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:06,952 INFO L93 Difference]: Finished difference Result 311 states and 401 transitions. [2021-11-25 18:42:06,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 18:42:06,953 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-11-25 18:42:06,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:06,956 INFO L225 Difference]: With dead ends: 311 [2021-11-25 18:42:06,956 INFO L226 Difference]: Without dead ends: 311 [2021-11-25 18:42:06,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=308, Invalid=3865, Unknown=7, NotChecked=650, Total=4830 [2021-11-25 18:42:06,959 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 159 mSDsluCounter, 2002 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 2121 SdHoareTripleChecker+Invalid, 2510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1239 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:06,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 2121 Invalid, 2510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1225 Invalid, 0 Unknown, 1239 Unchecked, 0.8s Time] [2021-11-25 18:42:06,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-25 18:42:06,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 194. [2021-11-25 18:42:06,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 137 states have (on average 1.5182481751824817) internal successors, (208), 166 states have internal predecessors, (208), 20 states have call successors, (20), 11 states have call predecessors, (20), 13 states have return successors, (26), 16 states have call predecessors, (26), 20 states have call successors, (26) [2021-11-25 18:42:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 254 transitions. [2021-11-25 18:42:06,971 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 254 transitions. Word has length 22 [2021-11-25 18:42:06,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:06,972 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 254 transitions. [2021-11-25 18:42:06,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:42:06,972 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 254 transitions. [2021-11-25 18:42:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 18:42:06,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:06,973 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:07,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:42:07,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-25 18:42:07,191 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:42:07,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:07,191 INFO L85 PathProgramCache]: Analyzing trace with hash -787313730, now seen corresponding path program 1 times [2021-11-25 18:42:07,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:07,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453269466] [2021-11-25 18:42:07,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:07,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:07,250 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 18:42:07,250 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:07,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453269466] [2021-11-25 18:42:07,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453269466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:42:07,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:42:07,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:42:07,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106760755] [2021-11-25 18:42:07,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:42:07,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:42:07,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:07,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:42:07,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:42:07,253 INFO L87 Difference]: Start difference. First operand 194 states and 254 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:42:07,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:07,460 INFO L93 Difference]: Finished difference Result 201 states and 248 transitions. [2021-11-25 18:42:07,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:42:07,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-11-25 18:42:07,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:07,462 INFO L225 Difference]: With dead ends: 201 [2021-11-25 18:42:07,462 INFO L226 Difference]: Without dead ends: 201 [2021-11-25 18:42:07,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:42:07,463 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 127 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:07,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 169 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:42:07,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-25 18:42:07,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 191. [2021-11-25 18:42:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 137 states have (on average 1.4525547445255473) internal successors, (199), 163 states have internal predecessors, (199), 20 states have call successors, (20), 11 states have call predecessors, (20), 13 states have return successors, (26), 16 states have call predecessors, (26), 20 states have call successors, (26) [2021-11-25 18:42:07,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 245 transitions. [2021-11-25 18:42:07,480 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 245 transitions. Word has length 23 [2021-11-25 18:42:07,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:07,481 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 245 transitions. [2021-11-25 18:42:07,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:42:07,482 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 245 transitions. [2021-11-25 18:42:07,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 18:42:07,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:07,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:07,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-25 18:42:07,483 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:42:07,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:07,484 INFO L85 PathProgramCache]: Analyzing trace with hash -787313729, now seen corresponding path program 1 times [2021-11-25 18:42:07,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:07,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049503099] [2021-11-25 18:42:07,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:07,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:07,588 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 18:42:07,588 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:07,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049503099] [2021-11-25 18:42:07,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049503099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:42:07,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:42:07,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:42:07,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601947048] [2021-11-25 18:42:07,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:42:07,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:42:07,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:07,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:42:07,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:42:07,593 INFO L87 Difference]: Start difference. First operand 191 states and 245 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:42:07,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:07,787 INFO L93 Difference]: Finished difference Result 199 states and 244 transitions. [2021-11-25 18:42:07,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:42:07,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-11-25 18:42:07,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:07,789 INFO L225 Difference]: With dead ends: 199 [2021-11-25 18:42:07,789 INFO L226 Difference]: Without dead ends: 199 [2021-11-25 18:42:07,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:42:07,790 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 88 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:07,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 190 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:42:07,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-25 18:42:07,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 191. [2021-11-25 18:42:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 137 states have (on average 1.416058394160584) internal successors, (194), 163 states have internal predecessors, (194), 20 states have call successors, (20), 11 states have call predecessors, (20), 13 states have return successors, (26), 16 states have call predecessors, (26), 20 states have call successors, (26) [2021-11-25 18:42:07,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 240 transitions. [2021-11-25 18:42:07,825 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 240 transitions. Word has length 23 [2021-11-25 18:42:07,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:07,826 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 240 transitions. [2021-11-25 18:42:07,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:42:07,826 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 240 transitions. [2021-11-25 18:42:07,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:42:07,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:07,827 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:07,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-25 18:42:07,828 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:42:07,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:07,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1226886610, now seen corresponding path program 2 times [2021-11-25 18:42:07,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:07,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351463515] [2021-11-25 18:42:07,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:07,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:42:08,027 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:08,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351463515] [2021-11-25 18:42:08,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351463515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:42:08,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356317702] [2021-11-25 18:42:08,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:42:08,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:08,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:42:08,030 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:42:08,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:42:08,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:42:08,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:42:08,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 18:42:08,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:42:08,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:42:08,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-25 18:42:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:42:08,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:42:08,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-11-25 18:42:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:42:08,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356317702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:42:08,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1616293974] [2021-11-25 18:42:08,387 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:42:08,387 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:42:08,387 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:42:08,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:42:08,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2021-11-25 18:42:08,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019310819] [2021-11-25 18:42:08,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:42:08,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:42:08,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:08,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:42:08,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:42:08,393 INFO L87 Difference]: Start difference. First operand 191 states and 240 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:42:08,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:08,933 INFO L93 Difference]: Finished difference Result 260 states and 325 transitions. [2021-11-25 18:42:08,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:42:08,933 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-25 18:42:08,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:08,936 INFO L225 Difference]: With dead ends: 260 [2021-11-25 18:42:08,936 INFO L226 Difference]: Without dead ends: 260 [2021-11-25 18:42:08,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:42:08,937 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 165 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:08,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 621 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 729 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2021-11-25 18:42:08,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-25 18:42:08,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 223. [2021-11-25 18:42:08,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 161 states have (on average 1.4285714285714286) internal successors, (230), 189 states have internal predecessors, (230), 26 states have call successors, (26), 13 states have call predecessors, (26), 15 states have return successors, (32), 20 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-25 18:42:08,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 288 transitions. [2021-11-25 18:42:08,948 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 288 transitions. Word has length 24 [2021-11-25 18:42:08,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:08,948 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 288 transitions. [2021-11-25 18:42:08,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:42:08,949 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 288 transitions. [2021-11-25 18:42:08,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:42:08,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:08,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:08,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:42:09,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-25 18:42:09,176 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting is_list_containing_xErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:42:09,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:09,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1226886611, now seen corresponding path program 1 times [2021-11-25 18:42:09,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:09,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21373217] [2021-11-25 18:42:09,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:09,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:42:10,134 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:10,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21373217] [2021-11-25 18:42:10,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21373217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:42:10,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948826485] [2021-11-25 18:42:10,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:10,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:10,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:42:10,137 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:42:10,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:42:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:10,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-25 18:42:10,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:42:10,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:42:10,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:42:10,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:42:10,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-25 18:42:10,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 18:42:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:42:10,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:42:11,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-11-25 18:42:11,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:11,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:11,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:11,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:42:11,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948826485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:42:11,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1625634159] [2021-11-25 18:42:11,223 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:42:11,223 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:42:11,223 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:42:11,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:42:11,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 34 [2021-11-25 18:42:11,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602190812] [2021-11-25 18:42:11,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:42:11,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-25 18:42:11,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:11,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-25 18:42:11,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 18:42:11,225 INFO L87 Difference]: Start difference. First operand 223 states and 288 transitions. Second operand has 35 states, 31 states have (on average 2.096774193548387) internal successors, (65), 29 states have internal predecessors, (65), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:42:14,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:14,047 INFO L93 Difference]: Finished difference Result 261 states and 324 transitions. [2021-11-25 18:42:14,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 18:42:14,047 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.096774193548387) internal successors, (65), 29 states have internal predecessors, (65), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-25 18:42:14,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:14,049 INFO L225 Difference]: With dead ends: 261 [2021-11-25 18:42:14,050 INFO L226 Difference]: Without dead ends: 261 [2021-11-25 18:42:14,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=294, Invalid=1962, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:42:14,051 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 615 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 2200 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 2429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 2200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:14,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 771 Invalid, 2429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 2200 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-25 18:42:14,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-25 18:42:14,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 223. [2021-11-25 18:42:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 161 states have (on average 1.4223602484472049) internal successors, (229), 189 states have internal predecessors, (229), 26 states have call successors, (26), 13 states have call predecessors, (26), 15 states have return successors, (32), 20 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-25 18:42:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 287 transitions. [2021-11-25 18:42:14,064 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 287 transitions. Word has length 24 [2021-11-25 18:42:14,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:14,064 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 287 transitions. [2021-11-25 18:42:14,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.096774193548387) internal successors, (65), 29 states have internal predecessors, (65), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:42:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 287 transitions. [2021-11-25 18:42:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 18:42:14,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:14,066 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:14,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:42:14,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-25 18:42:14,274 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:42:14,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:14,274 INFO L85 PathProgramCache]: Analyzing trace with hash 840902531, now seen corresponding path program 1 times [2021-11-25 18:42:14,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:14,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305561711] [2021-11-25 18:42:14,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:14,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:42:14,380 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:14,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305561711] [2021-11-25 18:42:14,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305561711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:42:14,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480272550] [2021-11-25 18:42:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:14,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:14,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:42:14,383 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:42:14,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:42:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:14,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 18:42:14,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:42:14,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:42:15,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-25 18:42:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:42:15,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:42:15,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-25 18:42:15,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2021-11-25 18:42:15,672 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 14 treesize of output 12 [2021-11-25 18:42:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:42:15,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480272550] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:42:15,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1380835771] [2021-11-25 18:42:15,680 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-25 18:42:15,681 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:42:15,681 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:42:15,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:42:15,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 12] total 26 [2021-11-25 18:42:15,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988579008] [2021-11-25 18:42:15,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:42:15,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 18:42:15,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:15,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 18:42:15,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-11-25 18:42:15,685 INFO L87 Difference]: Start difference. First operand 223 states and 287 transitions. Second operand has 27 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-25 18:42:16,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:16,213 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2021-11-25 18:42:16,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 18:42:16,213 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 25 [2021-11-25 18:42:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:16,215 INFO L225 Difference]: With dead ends: 361 [2021-11-25 18:42:16,216 INFO L226 Difference]: Without dead ends: 359 [2021-11-25 18:42:16,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2021-11-25 18:42:16,217 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 141 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:16,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 782 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 658 Invalid, 0 Unknown, 382 Unchecked, 0.4s Time] [2021-11-25 18:42:16,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-25 18:42:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 232. [2021-11-25 18:42:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 168 states have (on average 1.3988095238095237) internal successors, (235), 196 states have internal predecessors, (235), 27 states have call successors, (27), 14 states have call predecessors, (27), 16 states have return successors, (31), 21 states have call predecessors, (31), 27 states have call successors, (31) [2021-11-25 18:42:16,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 293 transitions. [2021-11-25 18:42:16,230 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 293 transitions. Word has length 25 [2021-11-25 18:42:16,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:16,230 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 293 transitions. [2021-11-25 18:42:16,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-25 18:42:16,231 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 293 transitions. [2021-11-25 18:42:16,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 18:42:16,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:16,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:16,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:42:16,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-25 18:42:16,448 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:42:16,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:16,449 INFO L85 PathProgramCache]: Analyzing trace with hash 840902532, now seen corresponding path program 1 times [2021-11-25 18:42:16,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:16,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256577148] [2021-11-25 18:42:16,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:16,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:42:16,585 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:16,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256577148] [2021-11-25 18:42:16,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256577148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:42:16,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782467046] [2021-11-25 18:42:16,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:16,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:16,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:42:16,590 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:42:16,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:42:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:16,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-25 18:42:16,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:42:16,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:42:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:42:17,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:42:17,847 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 28 treesize of output 26 [2021-11-25 18:42:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:42:17,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782467046] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:42:17,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [344976317] [2021-11-25 18:42:17,887 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-25 18:42:17,887 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:42:17,888 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:42:17,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:42:17,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 26 [2021-11-25 18:42:17,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91608166] [2021-11-25 18:42:17,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:42:17,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 18:42:17,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:17,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 18:42:17,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-11-25 18:42:17,893 INFO L87 Difference]: Start difference. First operand 232 states and 293 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 24 states have internal predecessors, (58), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:42:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:18,608 INFO L93 Difference]: Finished difference Result 299 states and 385 transitions. [2021-11-25 18:42:18,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 18:42:18,618 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 24 states have internal predecessors, (58), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 25 [2021-11-25 18:42:18,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:18,621 INFO L225 Difference]: With dead ends: 299 [2021-11-25 18:42:18,621 INFO L226 Difference]: Without dead ends: 299 [2021-11-25 18:42:18,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 18:42:18,622 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 254 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:18,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 634 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 732 Invalid, 0 Unknown, 164 Unchecked, 0.4s Time] [2021-11-25 18:42:18,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-25 18:42:18,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 234. [2021-11-25 18:42:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 170 states have (on average 1.3823529411764706) internal successors, (235), 198 states have internal predecessors, (235), 27 states have call successors, (27), 14 states have call predecessors, (27), 16 states have return successors, (31), 21 states have call predecessors, (31), 27 states have call successors, (31) [2021-11-25 18:42:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 293 transitions. [2021-11-25 18:42:18,634 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 293 transitions. Word has length 25 [2021-11-25 18:42:18,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:18,634 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 293 transitions. [2021-11-25 18:42:18,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 24 states have internal predecessors, (58), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:42:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 293 transitions. [2021-11-25 18:42:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 18:42:18,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:18,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:18,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:42:18,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-25 18:42:18,858 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:42:18,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:18,858 INFO L85 PathProgramCache]: Analyzing trace with hash 856309015, now seen corresponding path program 1 times [2021-11-25 18:42:18,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:18,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619634883] [2021-11-25 18:42:18,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:18,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:42:18,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:18,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619634883] [2021-11-25 18:42:18,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619634883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:42:18,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:42:18,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:42:18,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241363445] [2021-11-25 18:42:18,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:42:18,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:42:18,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:18,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:42:18,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:42:18,892 INFO L87 Difference]: Start difference. First operand 234 states and 293 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:42:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:18,947 INFO L93 Difference]: Finished difference Result 240 states and 293 transitions. [2021-11-25 18:42:18,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:42:18,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-25 18:42:18,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:18,949 INFO L225 Difference]: With dead ends: 240 [2021-11-25 18:42:18,949 INFO L226 Difference]: Without dead ends: 240 [2021-11-25 18:42:18,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:42:18,951 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 22 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:18,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 223 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:42:18,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-25 18:42:18,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 223. [2021-11-25 18:42:18,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 163 states have (on average 1.3865030674846626) internal successors, (226), 189 states have internal predecessors, (226), 24 states have call successors, (24), 13 states have call predecessors, (24), 15 states have return successors, (28), 20 states have call predecessors, (28), 24 states have call successors, (28) [2021-11-25 18:42:18,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 278 transitions. [2021-11-25 18:42:18,961 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 278 transitions. Word has length 26 [2021-11-25 18:42:18,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:18,961 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 278 transitions. [2021-11-25 18:42:18,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:42:18,962 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 278 transitions. [2021-11-25 18:42:18,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 18:42:18,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:18,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:18,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-25 18:42:18,963 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:42:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:18,964 INFO L85 PathProgramCache]: Analyzing trace with hash -876853165, now seen corresponding path program 1 times [2021-11-25 18:42:18,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:18,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096095064] [2021-11-25 18:42:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:18,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:19,295 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 18:42:19,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:19,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096095064] [2021-11-25 18:42:19,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096095064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:42:19,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30470798] [2021-11-25 18:42:19,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:19,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:19,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:42:19,298 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:42:19,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 18:42:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:19,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-25 18:42:19,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:42:19,500 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 18:42:19,507 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 18:42:19,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:19,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:42:19,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:19,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:42:19,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:19,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:42:19,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:19,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:42:19,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:19,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:42:19,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:19,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:42:19,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:19,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:42:19,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:19,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:42:20,120 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:42:20,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-11-25 18:42:20,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-11-25 18:42:20,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:42:20,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:42:20,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2021-11-25 18:42:20,149 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 18:42:20,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:42:20,170 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1356 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_remove_#t~mem4#1.base| v_ArrVal_1356) |c_ULTIMATE.start_remove_~x#1.base|) |c_ULTIMATE.start_remove_~x#1.offset|) 0)) (forall ((v_ArrVal_1357 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_remove_#t~mem4#1.base| v_ArrVal_1357) |c_ULTIMATE.start_remove_~x#1.base|) |c_ULTIMATE.start_remove_~x#1.offset|) 0))) is different from false [2021-11-25 18:42:20,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30470798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:42:20,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [250294116] [2021-11-25 18:42:20,456 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 18:42:20,456 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:42:20,456 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:42:20,457 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:42:20,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:42:20,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:42:20,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:42:20,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:42:20,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:42:20,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:42:20,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:42:20,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:42:20,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:42:20,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:42:20,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:42:20,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:42:20,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:42:20,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:42:20,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:42:20,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:20,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 18:42:20,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:20,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 18:42:20,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:42:20,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2021-11-25 18:42:20,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:42:20,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,897 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:42:20,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 132 [2021-11-25 18:42:20,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:20,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:20,944 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-25 18:42:20,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 188 treesize of output 133 [2021-11-25 18:42:20,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:42:20,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:42:21,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:42:21,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:21,039 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:42:21,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 18:42:21,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:42:21,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:21,113 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:42:21,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:42:21,179 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-25 18:42:21,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2021-11-25 18:42:21,198 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:42:21,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 38 [2021-11-25 18:42:21,257 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-25 18:42:21,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 145 [2021-11-25 18:42:21,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:21,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:21,274 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:42:21,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 160 [2021-11-25 18:42:21,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 18:42:21,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:42:21,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:42:21,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:42:21,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:21,406 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:42:21,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:42:21,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:42:21,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:21,434 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:42:21,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 18:42:21,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:21,689 INFO L354 Elim1Store]: treesize reduction 62, result has 34.7 percent of original size [2021-11-25 18:42:21,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 163 treesize of output 130 [2021-11-25 18:42:21,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:21,749 INFO L354 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2021-11-25 18:42:21,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 101 [2021-11-25 18:42:21,762 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 18:42:21,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:42:21,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:42:21,939 INFO L197 IcfgInterpreter]: Interpreting procedure is_list_containing_x with input of size 21 for LOIs [2021-11-25 18:42:21,950 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:42:26,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12768#(and (not (= (select |#valid| |ULTIMATE.start_remove_#t~mem7#1.base|) 1)) (<= 0 |ULTIMATE.start_main_~tail~0#1.base|) (= (select |#valid| |ULTIMATE.start_remove_~x#1.base|) 1) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~#list~0#1.base| |ULTIMATE.start_main_~x~0#1.base|) (<= (+ 8 |ULTIMATE.start_remove_~x#1.offset|) (select |#length| |ULTIMATE.start_remove_~x#1.base|)) (<= 0 |ULTIMATE.start_main_~tail~0#1.offset|) (= (mod (+ (* |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 255) 1) 256) 0) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_main_~x~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) |ULTIMATE.start_remove_#t~mem8#1.offset|) (< |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 256) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#list~0#1.base|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_remove_~x#1.offset|) (<= |ULTIMATE.start_main_~#list~0#1.offset| 0) (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) 0))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) |ULTIMATE.start_remove_#t~mem7#1.base|) (= |ULTIMATE.start_main_~#list~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.offset| |ULTIMATE.start_remove_~x#1.offset|) (= |ULTIMATE.start_remove_#in~x#1.base| |ULTIMATE.start_remove_~x#1.base|) (or (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|))) (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|) (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)))) (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) 1) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|)) (<= 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) (<= (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) 4) (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)))) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4)) 0))))) (= |ULTIMATE.start_remove_#t~mem7#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_~x#1.base|) |ULTIMATE.start_remove_~x#1.offset|)) (= |ULTIMATE.start_remove_#t~mem8#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_~x#1.base|) (+ |ULTIMATE.start_remove_~x#1.offset| 4))) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= |ULTIMATE.start_main_~tail~0#1.offset| 0))' at error location [2021-11-25 18:42:26,013 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:42:26,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:42:26,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-11-25 18:42:26,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025711808] [2021-11-25 18:42:26,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:42:26,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 18:42:26,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:26,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 18:42:26,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2077, Unknown=1, NotChecked=92, Total=2352 [2021-11-25 18:42:26,016 INFO L87 Difference]: Start difference. First operand 223 states and 278 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:42:27,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:27,318 INFO L93 Difference]: Finished difference Result 359 states and 465 transitions. [2021-11-25 18:42:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:42:27,319 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-11-25 18:42:27,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:27,321 INFO L225 Difference]: With dead ends: 359 [2021-11-25 18:42:27,322 INFO L226 Difference]: Without dead ends: 359 [2021-11-25 18:42:27,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=329, Invalid=3334, Unknown=1, NotChecked=118, Total=3782 [2021-11-25 18:42:27,324 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 317 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:27,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 972 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 738 Invalid, 0 Unknown, 294 Unchecked, 0.7s Time] [2021-11-25 18:42:27,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-25 18:42:27,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 225. [2021-11-25 18:42:27,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 165 states have (on average 1.3818181818181818) internal successors, (228), 191 states have internal predecessors, (228), 24 states have call successors, (24), 13 states have call predecessors, (24), 15 states have return successors, (28), 20 states have call predecessors, (28), 24 states have call successors, (28) [2021-11-25 18:42:27,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 280 transitions. [2021-11-25 18:42:27,337 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 280 transitions. Word has length 25 [2021-11-25 18:42:27,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:27,338 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 280 transitions. [2021-11-25 18:42:27,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:42:27,338 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 280 transitions. [2021-11-25 18:42:27,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 18:42:27,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:27,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:27,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 18:42:27,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:27,554 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:42:27,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:27,554 INFO L85 PathProgramCache]: Analyzing trace with hash -46852464, now seen corresponding path program 1 times [2021-11-25 18:42:27,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:27,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676514669] [2021-11-25 18:42:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:27,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:27,634 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 18:42:27,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:27,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676514669] [2021-11-25 18:42:27,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676514669] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:42:27,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:42:27,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:42:27,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046986075] [2021-11-25 18:42:27,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:42:27,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:42:27,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:27,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:42:27,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:42:27,640 INFO L87 Difference]: Start difference. First operand 225 states and 280 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:42:27,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:27,829 INFO L93 Difference]: Finished difference Result 231 states and 282 transitions. [2021-11-25 18:42:27,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:42:27,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-25 18:42:27,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:27,831 INFO L225 Difference]: With dead ends: 231 [2021-11-25 18:42:27,831 INFO L226 Difference]: Without dead ends: 231 [2021-11-25 18:42:27,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:42:27,832 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 40 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:27,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 245 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:42:27,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-25 18:42:27,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 223. [2021-11-25 18:42:27,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 163 states have (on average 1.3680981595092025) internal successors, (223), 189 states have internal predecessors, (223), 24 states have call successors, (24), 13 states have call predecessors, (24), 15 states have return successors, (28), 20 states have call predecessors, (28), 24 states have call successors, (28) [2021-11-25 18:42:27,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 275 transitions. [2021-11-25 18:42:27,843 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 275 transitions. Word has length 26 [2021-11-25 18:42:27,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:27,843 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 275 transitions. [2021-11-25 18:42:27,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:42:27,844 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 275 transitions. [2021-11-25 18:42:27,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 18:42:27,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:27,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:27,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-25 18:42:27,846 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:42:27,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:27,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1414277856, now seen corresponding path program 1 times [2021-11-25 18:42:27,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:27,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688274545] [2021-11-25 18:42:27,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:27,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:27,938 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 18:42:27,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:27,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688274545] [2021-11-25 18:42:27,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688274545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:42:27,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014485207] [2021-11-25 18:42:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:27,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:27,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:42:27,942 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:42:27,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 18:42:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:28,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 18:42:28,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:42:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:42:28,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:42:28,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014485207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:42:28,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:42:28,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-11-25 18:42:28,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481745857] [2021-11-25 18:42:28,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:42:28,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:42:28,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:28,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:42:28,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:42:28,206 INFO L87 Difference]: Start difference. First operand 223 states and 275 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:42:28,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:28,373 INFO L93 Difference]: Finished difference Result 270 states and 344 transitions. [2021-11-25 18:42:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:42:28,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-11-25 18:42:28,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:28,375 INFO L225 Difference]: With dead ends: 270 [2021-11-25 18:42:28,375 INFO L226 Difference]: Without dead ends: 270 [2021-11-25 18:42:28,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:42:28,376 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 152 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:28,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 253 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 185 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2021-11-25 18:42:28,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-25 18:42:28,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 229. [2021-11-25 18:42:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 169 states have (on average 1.3727810650887573) internal successors, (232), 192 states have internal predecessors, (232), 24 states have call successors, (24), 13 states have call predecessors, (24), 15 states have return successors, (28), 23 states have call predecessors, (28), 24 states have call successors, (28) [2021-11-25 18:42:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 284 transitions. [2021-11-25 18:42:28,386 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 284 transitions. Word has length 28 [2021-11-25 18:42:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:28,387 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 284 transitions. [2021-11-25 18:42:28,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:42:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 284 transitions. [2021-11-25 18:42:28,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 18:42:28,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:28,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:28,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 18:42:28,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:28,614 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:42:28,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:28,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1414277857, now seen corresponding path program 1 times [2021-11-25 18:42:28,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:28,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598930225] [2021-11-25 18:42:28,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:28,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:28,756 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 18:42:28,756 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:28,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598930225] [2021-11-25 18:42:28,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598930225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:42:28,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105552797] [2021-11-25 18:42:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:28,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:28,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:42:28,758 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:42:28,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 18:42:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:28,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-25 18:42:28,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:42:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:42:29,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:42:29,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105552797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:42:29,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:42:29,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 16 [2021-11-25 18:42:29,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187596978] [2021-11-25 18:42:29,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:42:29,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:42:29,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:29,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:42:29,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:42:29,092 INFO L87 Difference]: Start difference. First operand 229 states and 284 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:42:29,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:29,502 INFO L93 Difference]: Finished difference Result 353 states and 465 transitions. [2021-11-25 18:42:29,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 18:42:29,503 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-11-25 18:42:29,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:29,506 INFO L225 Difference]: With dead ends: 353 [2021-11-25 18:42:29,506 INFO L226 Difference]: Without dead ends: 353 [2021-11-25 18:42:29,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-11-25 18:42:29,507 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 182 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:29,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 589 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 456 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2021-11-25 18:42:29,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-25 18:42:29,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 279. [2021-11-25 18:42:29,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 208 states have (on average 1.375) internal successors, (286), 231 states have internal predecessors, (286), 33 states have call successors, (33), 15 states have call predecessors, (33), 17 states have return successors, (38), 32 states have call predecessors, (38), 33 states have call successors, (38) [2021-11-25 18:42:29,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 357 transitions. [2021-11-25 18:42:29,521 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 357 transitions. Word has length 28 [2021-11-25 18:42:29,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:29,521 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 357 transitions. [2021-11-25 18:42:29,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:42:29,522 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 357 transitions. [2021-11-25 18:42:29,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 18:42:29,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:29,523 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:29,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 18:42:29,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:29,746 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:42:29,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:29,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2066920866, now seen corresponding path program 1 times [2021-11-25 18:42:29,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:29,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323210754] [2021-11-25 18:42:29,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:29,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:29,833 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 18:42:29,834 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:29,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323210754] [2021-11-25 18:42:29,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323210754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:42:29,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:42:29,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:42:29,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068218379] [2021-11-25 18:42:29,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:42:29,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:42:29,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:29,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:42:29,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:42:29,836 INFO L87 Difference]: Start difference. First operand 279 states and 357 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:42:30,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:30,075 INFO L93 Difference]: Finished difference Result 306 states and 384 transitions. [2021-11-25 18:42:30,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:42:30,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-11-25 18:42:30,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:30,078 INFO L225 Difference]: With dead ends: 306 [2021-11-25 18:42:30,078 INFO L226 Difference]: Without dead ends: 306 [2021-11-25 18:42:30,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:42:30,079 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 91 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:30,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 273 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:42:30,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-25 18:42:30,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 289. [2021-11-25 18:42:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 215 states have (on average 1.3581395348837209) internal successors, (292), 238 states have internal predecessors, (292), 36 states have call successors, (36), 15 states have call predecessors, (36), 17 states have return successors, (41), 35 states have call predecessors, (41), 36 states have call successors, (41) [2021-11-25 18:42:30,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 369 transitions. [2021-11-25 18:42:30,091 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 369 transitions. Word has length 28 [2021-11-25 18:42:30,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:30,092 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 369 transitions. [2021-11-25 18:42:30,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:42:30,092 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 369 transitions. [2021-11-25 18:42:30,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 18:42:30,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:30,093 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:30,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-25 18:42:30,094 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-25 18:42:30,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:30,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2027702963, now seen corresponding path program 3 times [2021-11-25 18:42:30,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:30,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857560290] [2021-11-25 18:42:30,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:30,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:42:30,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:30,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857560290] [2021-11-25 18:42:30,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857560290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:42:30,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256993965] [2021-11-25 18:42:30,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:42:30,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:30,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:42:30,739 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:42:30,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26546a68-af49-4797-a64b-3ab5a14c3e31/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 18:42:30,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:42:30,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:42:30,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 18:42:30,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:42:31,084 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 13 treesize of output 9 [2021-11-25 18:42:31,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:42:31,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:31,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:42:31,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:31,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-25 18:42:31,495 INFO L354 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2021-11-25 18:42:31,496 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 45 [2021-11-25 18:42:31,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:31,500 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 12 [2021-11-25 18:42:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:42:31,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:42:31,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:42:31,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 4529 treesize of output 3846 [2021-11-25 18:42:32,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5526 treesize of output 5322