./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext2-properties/simple_search_value-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/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_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext2-properties/simple_search_value-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9339a3186df1139a7984a9803a310ef99d020bdafafac2d122ebd6ff2b132483 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:03:17,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:03:17,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:03:17,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:03:17,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:03:17,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:03:17,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:03:17,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:03:17,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:03:17,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:03:17,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:03:17,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:03:17,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:03:17,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:03:17,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:03:17,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:03:17,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:03:17,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:03:17,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:03:17,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:03:17,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:03:17,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:03:17,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:03:17,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:03:17,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:03:17,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:03:17,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:03:17,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:03:17,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:03:17,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:03:17,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:03:17,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:03:17,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:03:17,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:03:17,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:03:17,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:03:17,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:03:17,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:03:17,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:03:17,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:03:17,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:03:17,435 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:03:17,482 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:03:17,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:03:17,483 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:03:17,483 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:03:17,484 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:03:17,484 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:03:17,484 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:03:17,485 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:03:17,485 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:03:17,485 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:03:17,486 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:03:17,486 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:03:17,487 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:03:17,487 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:03:17,487 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:03:17,487 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:03:17,487 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:03:17,488 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:03:17,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:03:17,489 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:03:17,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:03:17,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:03:17,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:03:17,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:03:17,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:03:17,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:03:17,492 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:03:17,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:03:17,493 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:03:17,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:03:17,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:03:17,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:03:17,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:03:17,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:03:17,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:03:17,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:03:17,495 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:03:17,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:03:17,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:03:17,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:03:17,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:03:17,496 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_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9339a3186df1139a7984a9803a310ef99d020bdafafac2d122ebd6ff2b132483 [2021-11-25 18:03:17,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:03:17,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:03:17,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:03:17,750 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:03:17,750 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:03:17,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/list-ext2-properties/simple_search_value-1.i [2021-11-25 18:03:17,830 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/data/e210b4c7d/14dc808ec8d14d8d87837276ae769dd6/FLAGa76767fd8 [2021-11-25 18:03:18,342 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:03:18,342 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/sv-benchmarks/c/list-ext2-properties/simple_search_value-1.i [2021-11-25 18:03:18,363 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/data/e210b4c7d/14dc808ec8d14d8d87837276ae769dd6/FLAGa76767fd8 [2021-11-25 18:03:18,655 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/data/e210b4c7d/14dc808ec8d14d8d87837276ae769dd6 [2021-11-25 18:03:18,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:03:18,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:03:18,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:03:18,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:03:18,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:03:18,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:03:18" (1/1) ... [2021-11-25 18:03:18,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@142a834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:18, skipping insertion in model container [2021-11-25 18:03:18,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:03:18" (1/1) ... [2021-11-25 18:03:18,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:03:18,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:03:19,057 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_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/sv-benchmarks/c/list-ext2-properties/simple_search_value-1.i[23210,23223] [2021-11-25 18:03:19,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:03:19,070 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:03:19,123 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_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/sv-benchmarks/c/list-ext2-properties/simple_search_value-1.i[23210,23223] [2021-11-25 18:03:19,124 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:03:19,153 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:03:19,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:19 WrapperNode [2021-11-25 18:03:19,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:03:19,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:03:19,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:03:19,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:03:19,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:19" (1/1) ... [2021-11-25 18:03:19,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:19" (1/1) ... [2021-11-25 18:03:19,193 INFO L137 Inliner]: procedures = 122, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 70 [2021-11-25 18:03:19,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:03:19,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:03:19,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:03:19,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:03:19,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:19" (1/1) ... [2021-11-25 18:03:19,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:19" (1/1) ... [2021-11-25 18:03:19,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:19" (1/1) ... [2021-11-25 18:03:19,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:19" (1/1) ... [2021-11-25 18:03:19,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:19" (1/1) ... [2021-11-25 18:03:19,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:19" (1/1) ... [2021-11-25 18:03:19,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:19" (1/1) ... [2021-11-25 18:03:19,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:03:19,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:03:19,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:03:19,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:03:19,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:19" (1/1) ... [2021-11-25 18:03:19,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:03:19,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:19,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:03:19,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:03:19,308 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-25 18:03:19,308 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-25 18:03:19,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:03:19,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:03:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:03:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:03:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:03:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:03:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:03:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:03:19,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:03:19,410 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:03:19,412 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:03:19,455 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-25 18:03:19,641 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:03:19,687 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:03:19,687 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:03:19,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:03:19 BoogieIcfgContainer [2021-11-25 18:03:19,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:03:19,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:03:19,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:03:19,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:03:19,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:03:18" (1/3) ... [2021-11-25 18:03:19,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15c59a73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:03:19, skipping insertion in model container [2021-11-25 18:03:19,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:19" (2/3) ... [2021-11-25 18:03:19,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15c59a73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:03:19, skipping insertion in model container [2021-11-25 18:03:19,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:03:19" (3/3) ... [2021-11-25 18:03:19,705 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_search_value-1.i [2021-11-25 18:03:19,714 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:03:19,714 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:03:19,785 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:03:19,792 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:03:19,792 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:03:19,808 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:19,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:03:19,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:19,813 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:19,814 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:19,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:19,819 INFO L85 PathProgramCache]: Analyzing trace with hash 357319940, now seen corresponding path program 1 times [2021-11-25 18:03:19,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:19,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656524258] [2021-11-25 18:03:19,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:19,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:19,981 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 18:03:19,981 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:19,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656524258] [2021-11-25 18:03:19,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656524258] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:19,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:19,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:03:19,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336031780] [2021-11-25 18:03:19,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:19,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:03:19,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:20,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:03:20,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:03:20,020 INFO L87 Difference]: Start difference. First operand has 18 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:20,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:20,048 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-11-25 18:03:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:03:20,050 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 18:03:20,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:20,057 INFO L225 Difference]: With dead ends: 25 [2021-11-25 18:03:20,057 INFO L226 Difference]: Without dead ends: 12 [2021-11-25 18:03:20,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:03:20,063 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:20,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:03:20,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-25 18:03:20,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-25 18:03:20,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:20,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-25 18:03:20,089 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-11-25 18:03:20,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:20,090 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-25 18:03:20,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:20,090 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-25 18:03:20,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:03:20,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:20,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:20,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:03:20,091 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:20,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:20,092 INFO L85 PathProgramCache]: Analyzing trace with hash -190520792, now seen corresponding path program 1 times [2021-11-25 18:03:20,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:20,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127253466] [2021-11-25 18:03:20,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:20,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:20,175 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 18:03:20,175 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:20,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127253466] [2021-11-25 18:03:20,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127253466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:20,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:20,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:03:20,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218646654] [2021-11-25 18:03:20,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:20,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:03:20,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:20,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:03:20,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:03:20,179 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:20,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:20,218 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-11-25 18:03:20,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:03:20,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 18:03:20,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:20,219 INFO L225 Difference]: With dead ends: 21 [2021-11-25 18:03:20,219 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 18:03:20,220 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 18:03:20,221 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:20,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 8 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:03:20,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 18:03:20,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2021-11-25 18:03:20,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:20,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-25 18:03:20,227 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-11-25 18:03:20,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:20,227 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-25 18:03:20,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:20,228 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-25 18:03:20,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:03:20,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:20,229 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:20,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:03:20,229 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:20,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:20,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1611067690, now seen corresponding path program 1 times [2021-11-25 18:03:20,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:20,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858998760] [2021-11-25 18:03:20,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:20,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:20,297 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 18:03:20,297 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:20,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858998760] [2021-11-25 18:03:20,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858998760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:20,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:20,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:03:20,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656816262] [2021-11-25 18:03:20,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:20,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:03:20,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:20,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:03:20,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:03:20,300 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:20,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:20,333 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-11-25 18:03:20,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:03:20,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 18:03:20,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:20,334 INFO L225 Difference]: With dead ends: 23 [2021-11-25 18:03:20,334 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 18:03:20,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 18:03:20,336 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:20,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:03:20,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 18:03:20,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-11-25 18:03:20,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-25 18:03:20,341 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-11-25 18:03:20,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:20,341 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-25 18:03:20,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-25 18:03:20,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 18:03:20,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:20,343 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:20,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:03:20,343 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:20,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:20,344 INFO L85 PathProgramCache]: Analyzing trace with hash -671746793, now seen corresponding path program 1 times [2021-11-25 18:03:20,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:20,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277368989] [2021-11-25 18:03:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:20,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:20,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:20,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277368989] [2021-11-25 18:03:20,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277368989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:20,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984628725] [2021-11-25 18:03:20,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:20,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:20,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:20,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:20,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:03:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:20,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:03:20,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:20,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:20,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984628725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:20,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [840991896] [2021-11-25 18:03:20,916 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 18:03:20,916 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:20,921 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:20,926 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:20,929 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:21,094 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:03:21,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 18:03:21,125 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 18:03:21,237 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 18:03:21,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:03:21,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:21,262 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 26 treesize of output 28 [2021-11-25 18:03:21,327 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-25 18:03:21,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-25 18:03:21,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 18:03:21,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 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 18:03:21,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:21,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2021-11-25 18:03:21,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:03:21,769 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-25 18:03:21,771 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 262 treesize of output 244 [2021-11-25 18:03:21,863 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-11-25 18:03:21,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 253 treesize of output 262 [2021-11-25 18:03:21,913 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-25 18:03:21,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 260 treesize of output 242 [2021-11-25 18:03:21,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:21,980 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-25 18:03:21,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 256 treesize of output 257 [2021-11-25 18:03:22,101 INFO L354 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2021-11-25 18:03:22,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 252 treesize of output 272 [2021-11-25 18:03:22,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:22,477 INFO L354 Elim1Store]: treesize reduction 146, result has 13.1 percent of original size [2021-11-25 18:03:22,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 336 treesize of output 305 [2021-11-25 18:03:22,527 INFO L354 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2021-11-25 18:03:22,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 314 treesize of output 269 [2021-11-25 18:03:22,571 INFO L354 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2021-11-25 18:03:22,574 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 1 case distinctions, treesize of input 260 treesize of output 257 [2021-11-25 18:03:22,774 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 18:03:22,779 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 18:03:22,785 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 18:03:22,790 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 15 treesize of output 1 [2021-11-25 18:03:22,795 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 18:03:22,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:03:22,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:03:22,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,837 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 13 [2021-11-25 18:03:22,893 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 18:03:22,897 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 18:03:22,902 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 18:03:22,906 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 18:03:22,913 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 18:03:22,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,945 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 22 treesize of output 7 [2021-11-25 18:03:22,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,960 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 16 treesize of output 17 [2021-11-25 18:03:22,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,972 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 16 treesize of output 17 [2021-11-25 18:03:23,151 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:23,500 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '258#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= 0 |ULTIMATE.start_main_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_~hasTwo~0#1|) (<= 0 |ULTIMATE.start_main_~hasSix~0#1|) (<= 10 |ULTIMATE.start_main_~counter~0#1|) (or (= |ULTIMATE.start_main_~hasSix~0#1| 0) (= |ULTIMATE.start_main_~hasTwo~0#1| 0)) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:03:23,500 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:23,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:03:23,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-11-25 18:03:23,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614961806] [2021-11-25 18:03:23,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:23,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:03:23,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:23,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:03:23,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:03:23,503 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 18:03:23,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:23,584 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-11-25 18:03:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:03:23,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 14 [2021-11-25 18:03:23,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:23,586 INFO L225 Difference]: With dead ends: 35 [2021-11-25 18:03:23,586 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 18:03:23,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:03:23,588 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:23,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:03:23,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 18:03:23,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-11-25 18:03:23,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 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 18:03:23,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-25 18:03:23,594 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 14 [2021-11-25 18:03:23,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:23,594 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-25 18:03:23,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 18:03:23,595 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-25 18:03:23,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 18:03:23,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:23,596 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:23,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:23,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-25 18:03:23,822 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:23,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:23,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1624470746, now seen corresponding path program 2 times [2021-11-25 18:03:23,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:23,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992890577] [2021-11-25 18:03:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:23,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:24,027 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:24,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992890577] [2021-11-25 18:03:24,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992890577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:24,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962255069] [2021-11-25 18:03:24,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:03:24,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:24,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:24,030 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:24,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:03:24,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 18:03:24,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:03:24,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:03:24,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:24,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:24,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962255069] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:24,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1812112303] [2021-11-25 18:03:24,752 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 18:03:24,752 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:24,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:24,753 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:24,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:24,785 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-25 18:03:24,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2021-11-25 18:03:24,815 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:03:24,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 18:03:24,864 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 18:03:24,869 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 18:03:24,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,875 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 26 treesize of output 28 [2021-11-25 18:03:24,920 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-25 18:03:24,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-25 18:03:24,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 18:03:24,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:03:24,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 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 18:03:25,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:03:25,138 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-25 18:03:25,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 258 treesize of output 240 [2021-11-25 18:03:25,168 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-25 18:03:25,169 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 258 treesize of output 240 [2021-11-25 18:03:25,271 INFO L354 Elim1Store]: treesize reduction 120, result has 27.3 percent of original size [2021-11-25 18:03:25,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 254 treesize of output 282 [2021-11-25 18:03:25,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:25,323 INFO L354 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2021-11-25 18:03:25,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 252 treesize of output 253 [2021-11-25 18:03:25,369 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-25 18:03:25,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 243 treesize of output 252 [2021-11-25 18:03:25,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:25,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:25,625 INFO L354 Elim1Store]: treesize reduction 146, result has 13.1 percent of original size [2021-11-25 18:03:25,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 319 treesize of output 304 [2021-11-25 18:03:25,662 INFO L354 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2021-11-25 18:03:25,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 304 treesize of output 259 [2021-11-25 18:03:25,697 INFO L354 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2021-11-25 18:03:25,698 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 1 case distinctions, treesize of input 250 treesize of output 247 [2021-11-25 18:03:25,879 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 18:03:25,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:03:25,888 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 18:03:25,893 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 18:03:25,898 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 15 treesize of output 1 [2021-11-25 18:03:25,922 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 13 treesize of output 9 [2021-11-25 18:03:25,930 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 18:03:25,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:25,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-11-25 18:03:25,987 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 18:03:25,996 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 18:03:26,000 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 18:03:26,005 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 18:03:26,009 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 18:03:26,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:26,034 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 22 treesize of output 7 [2021-11-25 18:03:26,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:26,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 18:03:26,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:26,057 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 16 treesize of output 17 [2021-11-25 18:03:26,219 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:26,585 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '516#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= 0 |ULTIMATE.start_main_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_~hasTwo~0#1|) (<= 0 |ULTIMATE.start_main_~hasSix~0#1|) (<= 10 |ULTIMATE.start_main_~counter~0#1|) (or (= |ULTIMATE.start_main_~hasSix~0#1| 0) (= |ULTIMATE.start_main_~hasTwo~0#1| 0)) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:03:26,585 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:26,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:03:26,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2021-11-25 18:03:26,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690913150] [2021-11-25 18:03:26,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:26,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 18:03:26,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:26,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 18:03:26,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-11-25 18:03:26,588 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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 18:03:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:26,770 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2021-11-25 18:03:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 18:03:26,771 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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 26 [2021-11-25 18:03:26,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:26,772 INFO L225 Difference]: With dead ends: 59 [2021-11-25 18:03:26,772 INFO L226 Difference]: Without dead ends: 53 [2021-11-25 18:03:26,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2021-11-25 18:03:26,774 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:26,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 35 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:03:26,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-25 18:03:26,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-11-25 18:03:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 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 18:03:26,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-11-25 18:03:26,781 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 26 [2021-11-25 18:03:26,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:26,782 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-11-25 18:03:26,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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 18:03:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-11-25 18:03:26,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 18:03:26,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:26,784 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:26,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:27,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:27,000 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:27,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:27,000 INFO L85 PathProgramCache]: Analyzing trace with hash -585920800, now seen corresponding path program 3 times [2021-11-25 18:03:27,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:27,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662404914] [2021-11-25 18:03:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:27,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:27,909 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-25 18:03:27,909 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:27,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662404914] [2021-11-25 18:03:27,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662404914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:27,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663830414] [2021-11-25 18:03:27,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:03:27,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:27,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:27,914 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:27,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a4f92ec-fbdc-416b-9316-4288a0d91ed5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:03:30,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:03:30,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:03:30,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 210 conjunts are in the unsatisfiable core [2021-11-25 18:03:30,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:30,330 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 18:03:30,401 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:03:30,401 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 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:03:30,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 18:03:30,584 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:03:30,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2021-11-25 18:03:30,608 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-25 18:03:30,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-11-25 18:03:30,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:30,730 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:03:30,731 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 44 [2021-11-25 18:03:30,861 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-25 18:03:30,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 68 [2021-11-25 18:03:30,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:30,905 INFO L354 Elim1Store]: treesize reduction 102, result has 37.0 percent of original size [2021-11-25 18:03:30,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 77 [2021-11-25 18:03:31,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:31,059 INFO L354 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2021-11-25 18:03:31,060 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 67 [2021-11-25 18:03:31,210 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-25 18:03:31,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 93 [2021-11-25 18:03:31,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:31,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:31,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:31,253 INFO L354 Elim1Store]: treesize reduction 146, result has 25.9 percent of original size [2021-11-25 18:03:31,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 57 treesize of output 68 [2021-11-25 18:03:31,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:31,456 INFO L354 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2021-11-25 18:03:31,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 82 [2021-11-25 18:03:31,676 INFO L354 Elim1Store]: treesize reduction 76, result has 39.2 percent of original size [2021-11-25 18:03:31,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 180 treesize of output 142 [2021-11-25 18:03:31,747 INFO L354 Elim1Store]: treesize reduction 162, result has 19.0 percent of original size [2021-11-25 18:03:31,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 58 [2021-11-25 18:03:31,799 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 17 treesize of output 9 [2021-11-25 18:03:31,835 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 37 treesize of output 27 [2021-11-25 18:03:31,859 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 39 treesize of output 29 [2021-11-25 18:03:32,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 50 [2021-11-25 18:03:32,233 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 43 treesize of output 33 [2021-11-25 18:03:32,376 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 172 treesize of output 120 [2021-11-25 18:03:32,515 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 53 treesize of output 29 [2021-11-25 18:03:32,643 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 131 treesize of output 87 [2021-11-25 18:03:32,728 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 98 treesize of output 58 [2021-11-25 18:03:33,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:34,552 INFO L354 Elim1Store]: treesize reduction 242, result has 71.8 percent of original size [2021-11-25 18:03:34,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 16 new quantified variables, introduced 55 case distinctions, treesize of input 668 treesize of output 856