./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/base_case.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/base_case.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh --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 f9dd43881ccf56b8e6da6d28cc61ed7f891fae597b16e121f5ac65378400d596 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:15:34,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:15:34,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:15:34,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:15:34,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:15:34,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:15:34,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:15:34,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:15:34,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:15:34,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:15:34,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:15:34,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:15:34,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:15:34,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:15:34,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:15:34,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:15:34,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:15:34,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:15:34,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:15:34,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:15:34,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:15:34,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:15:34,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:15:34,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:15:34,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:15:34,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:15:34,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:15:34,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:15:34,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:15:34,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:15:34,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:15:34,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:15:34,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:15:34,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:15:34,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:15:34,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:15:34,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:15:34,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:15:34,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:15:34,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:15:34,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:15:34,239 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:15:34,260 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:15:34,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:15:34,260 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:15:34,260 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:15:34,261 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:15:34,261 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:15:34,261 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:15:34,262 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:15:34,262 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:15:34,262 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:15:34,262 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:15:34,262 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:15:34,262 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:15:34,263 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:15:34,263 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:15:34,263 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:15:34,263 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:15:34,263 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:15:34,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:15:34,264 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:15:34,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:15:34,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:15:34,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:15:34,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:15:34,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:15:34,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:15:34,265 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:15:34,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:15:34,265 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:15:34,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:15:34,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:15:34,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:15:34,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:15:34,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:15:34,266 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:15:34,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:15:34,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:15:34,267 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:15:34,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:15:34,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:15:34,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:15:34,267 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9dd43881ccf56b8e6da6d28cc61ed7f891fae597b16e121f5ac65378400d596 [2022-12-14 13:15:34,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:15:34,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:15:34,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:15:34,460 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:15:34,460 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:15:34,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-lopstr16/base_case.i [2022-12-14 13:15:37,042 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:15:37,196 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:15:37,196 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/sv-benchmarks/c/array-lopstr16/base_case.i [2022-12-14 13:15:37,202 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/data/9416dd326/a689e883f11244169172bf4096c28e2a/FLAG4e24735d1 [2022-12-14 13:15:37,213 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/data/9416dd326/a689e883f11244169172bf4096c28e2a [2022-12-14 13:15:37,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:15:37,215 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:15:37,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:15:37,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:15:37,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:15:37,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:15:37" (1/1) ... [2022-12-14 13:15:37,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19cef5bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:37, skipping insertion in model container [2022-12-14 13:15:37,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:15:37" (1/1) ... [2022-12-14 13:15:37,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:15:37,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:15:37,375 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2022-12-14 13:15:37,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:15:37,398 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:15:37,406 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2022-12-14 13:15:37,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:15:37,421 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:15:37,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:37 WrapperNode [2022-12-14 13:15:37,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:15:37,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:15:37,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:15:37,423 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:15:37,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:37" (1/1) ... [2022-12-14 13:15:37,434 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:37" (1/1) ... [2022-12-14 13:15:37,447 INFO L138 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2022-12-14 13:15:37,447 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:15:37,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:15:37,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:15:37,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:15:37,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:37" (1/1) ... [2022-12-14 13:15:37,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:37" (1/1) ... [2022-12-14 13:15:37,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:37" (1/1) ... [2022-12-14 13:15:37,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:37" (1/1) ... [2022-12-14 13:15:37,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:37" (1/1) ... [2022-12-14 13:15:37,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:37" (1/1) ... [2022-12-14 13:15:37,467 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:37" (1/1) ... [2022-12-14 13:15:37,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:37" (1/1) ... [2022-12-14 13:15:37,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:15:37,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:15:37,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:15:37,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:15:37,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:37" (1/1) ... [2022-12-14 13:15:37,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:15:37,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:15:37,495 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:15:37,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:15:37,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 13:15:37,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:15:37,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:15:37,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 13:15:37,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 13:15:37,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 13:15:37,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:15:37,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:15:37,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 13:15:37,595 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:15:37,596 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:15:37,720 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:15:37,761 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:15:37,761 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 13:15:37,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:15:37 BoogieIcfgContainer [2022-12-14 13:15:37,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:15:37,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:15:37,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:15:37,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:15:37,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:15:37" (1/3) ... [2022-12-14 13:15:37,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f02792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:15:37, skipping insertion in model container [2022-12-14 13:15:37,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:15:37" (2/3) ... [2022-12-14 13:15:37,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f02792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:15:37, skipping insertion in model container [2022-12-14 13:15:37,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:15:37" (3/3) ... [2022-12-14 13:15:37,770 INFO L112 eAbstractionObserver]: Analyzing ICFG base_case.i [2022-12-14 13:15:37,784 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:15:37,784 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:15:37,817 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:15:37,821 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4018f7d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:15:37,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:15:37,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:15:37,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:15:37,829 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:15:37,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:15:37,829 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:15:37,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:15:37,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1687833653, now seen corresponding path program 1 times [2022-12-14 13:15:37,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:15:37,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026933297] [2022-12-14 13:15:37,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:15:37,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:15:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:15:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:15:37,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:15:37,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026933297] [2022-12-14 13:15:37,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026933297] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:15:37,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:15:37,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:15:37,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415035031] [2022-12-14 13:15:37,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:15:37,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:15:37,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:15:38,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:15:38,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:15:38,023 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:15:38,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:15:38,065 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2022-12-14 13:15:38,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:15:38,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 13:15:38,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:15:38,073 INFO L225 Difference]: With dead ends: 26 [2022-12-14 13:15:38,073 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 13:15:38,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:15:38,077 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:15:38,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 12 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:15:38,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 13:15:38,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2022-12-14 13:15:38,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:15:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-12-14 13:15:38,098 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-12-14 13:15:38,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:15:38,098 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-12-14 13:15:38,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:15:38,099 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-12-14 13:15:38,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:15:38,099 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:15:38,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:15:38,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:15:38,099 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:15:38,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:15:38,100 INFO L85 PathProgramCache]: Analyzing trace with hash -667887845, now seen corresponding path program 1 times [2022-12-14 13:15:38,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:15:38,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154224931] [2022-12-14 13:15:38,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:15:38,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:15:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:15:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:15:38,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:15:38,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154224931] [2022-12-14 13:15:38,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154224931] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:15:38,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343398061] [2022-12-14 13:15:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:15:38,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:15:38,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:15:38,188 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:15:38,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:15:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:15:38,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:15:38,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:15:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:15:38,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:15:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:15:38,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343398061] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:15:38,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1149853894] [2022-12-14 13:15:38,325 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 13:15:38,325 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:15:38,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:15:38,332 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:15:38,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:15:38,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 13:15:38,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 13:15:38,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:38,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:38,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 162 [2022-12-14 13:15:38,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:38,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 130 [2022-12-14 13:15:38,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:38,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 136 [2022-12-14 13:15:38,830 INFO L321 Elim1Store]: treesize reduction 234, result has 17.6 percent of original size [2022-12-14 13:15:38,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 114 treesize of output 170 [2022-12-14 13:15:38,921 INFO L321 Elim1Store]: treesize reduction 68, result has 11.7 percent of original size [2022-12-14 13:15:38,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 125 [2022-12-14 13:15:38,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:38,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 17 [2022-12-14 13:15:38,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:38,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 27 treesize of output 76 [2022-12-14 13:15:39,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 28 [2022-12-14 13:15:39,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 28 [2022-12-14 13:15:39,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 39 [2022-12-14 13:15:39,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 39 [2022-12-14 13:15:39,478 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 903 treesize of output 855 [2022-12-14 13:15:39,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 912 treesize of output 898 [2022-12-14 13:15:39,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 974 treesize of output 932 [2022-12-14 13:15:39,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,816 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 917 treesize of output 898 [2022-12-14 13:15:39,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,831 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 875 treesize of output 856 [2022-12-14 13:15:39,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-12-14 13:15:39,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-12-14 13:15:39,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:39,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-12-14 13:15:40,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:40,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-12-14 13:15:40,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:40,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-12-14 13:15:40,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:40,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:40,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 240 treesize of output 200 [2022-12-14 13:15:40,336 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:15:40,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:40,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 142 [2022-12-14 13:15:40,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:40,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 124 [2022-12-14 13:15:40,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:40,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 128 [2022-12-14 13:15:40,522 INFO L321 Elim1Store]: treesize reduction 48, result has 46.1 percent of original size [2022-12-14 13:15:40,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 130 treesize of output 186 [2022-12-14 13:15:40,556 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-12-14 13:15:40,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 148 [2022-12-14 13:15:40,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 7 [2022-12-14 13:15:40,693 INFO L321 Elim1Store]: treesize reduction 32, result has 39.6 percent of original size [2022-12-14 13:15:40,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 297 treesize of output 279 [2022-12-14 13:15:40,790 INFO L321 Elim1Store]: treesize reduction 30, result has 47.4 percent of original size [2022-12-14 13:15:40,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 304 treesize of output 331 [2022-12-14 13:15:40,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:40,858 INFO L321 Elim1Store]: treesize reduction 38, result has 49.3 percent of original size [2022-12-14 13:15:40,859 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 59 [2022-12-14 13:15:40,913 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-12-14 13:15:40,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 153 [2022-12-14 13:15:40,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:40,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:15:40,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 62 [2022-12-14 13:15:40,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:40,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-12-14 13:15:40,990 INFO L321 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-12-14 13:15:40,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 446 treesize of output 435 [2022-12-14 13:15:41,061 INFO L321 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2022-12-14 13:15:41,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 27 [2022-12-14 13:15:41,148 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 13:15:41,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 71 [2022-12-14 13:15:41,196 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:15:41,316 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '103#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem9#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s2~0#1.base|) (+ |ULTIMATE.start_main_~s2~0#1.offset| 4))) (= |ULTIMATE.start_main_~s2~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem9#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s2~0#1.base|) (+ |ULTIMATE.start_main_~s2~0#1.offset| 4))) (= |ULTIMATE.start_main_~s2~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|))) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~s2~0#1.base|) |ULTIMATE.start_main_~s2~0#1.offset|) 0) (= (ite (or (not (= |ULTIMATE.start_main_#t~mem9#1.base| 0)) (not (= |ULTIMATE.start_main_#t~mem9#1.offset| 0))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:15:41,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:15:41,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:15:41,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 13:15:41,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921391281] [2022-12-14 13:15:41,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:15:41,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:15:41,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:15:41,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:15:41,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=73, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:15:41,318 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:15:41,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:15:41,361 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-12-14 13:15:41,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:15:41,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 13:15:41,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:15:41,362 INFO L225 Difference]: With dead ends: 42 [2022-12-14 13:15:41,362 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 13:15:41,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=73, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:15:41,363 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:15:41,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 24 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:15:41,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 13:15:41,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 13. [2022-12-14 13:15:41,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2022-12-14 13:15:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-12-14 13:15:41,367 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-12-14 13:15:41,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:15:41,368 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-12-14 13:15:41,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:15:41,368 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-12-14 13:15:41,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:15:41,368 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:15:41,368 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-14 13:15:41,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:15:41,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:15:41,570 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:15:41,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:15:41,570 INFO L85 PathProgramCache]: Analyzing trace with hash 112986059, now seen corresponding path program 2 times [2022-12-14 13:15:41,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:15:41,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59419740] [2022-12-14 13:15:41,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:15:41,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:15:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:15:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:15:41,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:15:41,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59419740] [2022-12-14 13:15:41,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59419740] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:15:41,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207160335] [2022-12-14 13:15:41,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:15:41,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:15:41,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:15:41,800 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:15:41,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:15:41,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:15:41,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:15:41,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:15:41,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:15:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:15:42,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:15:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:15:42,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207160335] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:15:42,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [383078715] [2022-12-14 13:15:42,042 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 13:15:42,042 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:15:42,042 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:15:42,043 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:15:42,043 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:15:42,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 13:15:42,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 13:15:42,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:42,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:42,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 162 [2022-12-14 13:15:42,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:42,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 130 [2022-12-14 13:15:42,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:42,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 136 [2022-12-14 13:15:42,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:42,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:42,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:42,202 INFO L321 Elim1Store]: treesize reduction 68, result has 11.7 percent of original size [2022-12-14 13:15:42,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 140 [2022-12-14 13:15:42,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:42,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:42,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:42,310 INFO L321 Elim1Store]: treesize reduction 132, result has 14.8 percent of original size [2022-12-14 13:15:42,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 105 treesize of output 154 [2022-12-14 13:15:42,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:42,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 27 treesize of output 76 [2022-12-14 13:15:42,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:42,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 17 [2022-12-14 13:15:42,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:42,454 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 47 treesize of output 7 [2022-12-14 13:15:42,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:42,470 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 3 [2022-12-14 13:15:42,649 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-12-14 13:15:42,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 829 treesize of output 797 [2022-12-14 13:15:42,744 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2022-12-14 13:15:42,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 843 treesize of output 828 [2022-12-14 13:15:42,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:42,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 3 [2022-12-14 13:15:42,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:42,848 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 57 treesize of output 17 [2022-12-14 13:15:42,965 INFO L321 Elim1Store]: treesize reduction 93, result has 21.8 percent of original size [2022-12-14 13:15:42,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 858 treesize of output 999 [2022-12-14 13:15:43,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:43,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 11 [2022-12-14 13:15:43,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:43,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:43,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 14 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 834 treesize of output 6130 [2022-12-14 13:15:43,852 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:15:44,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:44,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:15:44,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:44,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:44,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:44,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:44,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:44,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:44,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:15:44,444 INFO L217 Elim1Store]: Index analysis took 245 ms [2022-12-14 13:15:44,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 42 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 17 new quantified variables, introduced 0 case distinctions, treesize of input 12447 treesize of output 285001 [2022-12-14 13:19:21,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:21,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:21,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 12 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 14 new quantified variables, introduced 0 case distinctions, treesize of input 1114 treesize of output 4734 [2022-12-14 13:19:22,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:19:22,481 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:19:24,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:24,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 142 [2022-12-14 13:19:24,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:24,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 124 [2022-12-14 13:19:24,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:24,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 128 [2022-12-14 13:19:24,137 INFO L321 Elim1Store]: treesize reduction 48, result has 46.1 percent of original size [2022-12-14 13:19:24,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 130 treesize of output 186 [2022-12-14 13:19:24,161 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-12-14 13:19:24,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 148 [2022-12-14 13:19:24,313 INFO L321 Elim1Store]: treesize reduction 30, result has 47.4 percent of original size [2022-12-14 13:19:24,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 574 treesize of output 588 [2022-12-14 13:19:24,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:24,382 INFO L321 Elim1Store]: treesize reduction 38, result has 49.3 percent of original size [2022-12-14 13:19:24,382 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 59 [2022-12-14 13:19:24,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 7 [2022-12-14 13:19:24,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 7 [2022-12-14 13:19:24,635 INFO L321 Elim1Store]: treesize reduction 32, result has 39.6 percent of original size [2022-12-14 13:19:24,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1452 treesize of output 1416 [2022-12-14 13:19:24,845 INFO L321 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-12-14 13:19:24,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1501 treesize of output 1482 [2022-12-14 13:19:24,991 INFO L321 Elim1Store]: treesize reduction 34, result has 42.4 percent of original size [2022-12-14 13:19:24,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1611 treesize of output 1474 [2022-12-14 13:19:25,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:25,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1304 treesize of output 1298 [2022-12-14 13:19:25,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:25,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1298 treesize of output 1292 [2022-12-14 13:19:25,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 9 [2022-12-14 13:19:25,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:25,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:25,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:19:25,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-12-14 13:19:25,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:25,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-12-14 13:19:25,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:25,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-12-14 13:19:25,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 9 [2022-12-14 13:19:25,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:25,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:25,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-12-14 13:19:25,283 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-12-14 13:19:25,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 11 [2022-12-14 13:19:25,318 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-12-14 13:19:25,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 11 [2022-12-14 13:19:25,373 INFO L321 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2022-12-14 13:19:25,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 27 [2022-12-14 13:19:25,406 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 41 treesize of output 7 [2022-12-14 13:19:25,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2022-12-14 13:19:25,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 58 [2022-12-14 13:19:25,554 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:19:25,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 86 [2022-12-14 13:19:25,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 13:19:25,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:19:25,780 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: no need to replace index at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.constructReplacementForSelectCase(DerPreprocessor.java:333) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.constructDerEnabler(DerPreprocessor.java:187) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:353) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:122) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 13:19:25,789 INFO L158 Benchmark]: Toolchain (without parser) took 228572.61ms. Allocated memory was 134.2MB in the beginning and 589.3MB in the end (delta: 455.1MB). Free memory was 93.5MB in the beginning and 279.5MB in the end (delta: -186.0MB). Peak memory consumption was 369.6MB. Max. memory is 16.1GB. [2022-12-14 13:19:25,790 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 134.2MB. Free memory is still 106.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 13:19:25,791 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.80ms. Allocated memory is still 134.2MB. Free memory was 93.2MB in the beginning and 82.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 13:19:25,793 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.37ms. Allocated memory is still 134.2MB. Free memory was 82.8MB in the beginning and 81.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 13:19:25,794 INFO L158 Benchmark]: Boogie Preprocessor took 22.43ms. Allocated memory is still 134.2MB. Free memory was 80.9MB in the beginning and 79.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 13:19:25,795 INFO L158 Benchmark]: RCFGBuilder took 292.82ms. Allocated memory is still 134.2MB. Free memory was 79.8MB in the beginning and 64.6MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 13:19:25,796 INFO L158 Benchmark]: TraceAbstraction took 228022.41ms. Allocated memory was 134.2MB in the beginning and 589.3MB in the end (delta: 455.1MB). Free memory was 63.9MB in the beginning and 279.5MB in the end (delta: -215.7MB). Peak memory consumption was 340.2MB. Max. memory is 16.1GB. [2022-12-14 13:19:25,803 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 134.2MB. Free memory is still 106.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 205.80ms. Allocated memory is still 134.2MB. Free memory was 93.2MB in the beginning and 82.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.37ms. Allocated memory is still 134.2MB. Free memory was 82.8MB in the beginning and 81.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.43ms. Allocated memory is still 134.2MB. Free memory was 80.9MB in the beginning and 79.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 292.82ms. Allocated memory is still 134.2MB. Free memory was 79.8MB in the beginning and 64.6MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 228022.41ms. Allocated memory was 134.2MB in the beginning and 589.3MB in the end (delta: 455.1MB). Free memory was 63.9MB in the beginning and 279.5MB in the end (delta: -215.7MB). Peak memory consumption was 340.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: no need to replace index de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: no need to replace index: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.constructReplacementForSelectCase(DerPreprocessor.java:333) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-12-14 13:19:25,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/base_case.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh --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 f9dd43881ccf56b8e6da6d28cc61ed7f891fae597b16e121f5ac65378400d596 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:19:27,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:19:27,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:19:27,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:19:27,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:19:27,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:19:27,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:19:27,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:19:27,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:19:27,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:19:27,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:19:27,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:19:27,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:19:27,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:19:27,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:19:27,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:19:27,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:19:27,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:19:27,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:19:27,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:19:27,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:19:27,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:19:27,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:19:27,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:19:27,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:19:27,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:19:27,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:19:27,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:19:27,410 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:19:27,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:19:27,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:19:27,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:19:27,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:19:27,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:19:27,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:19:27,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:19:27,419 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:19:27,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:19:27,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:19:27,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:19:27,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:19:27,422 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-12-14 13:19:27,446 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:19:27,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:19:27,446 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:19:27,447 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:19:27,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:19:27,448 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:19:27,448 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:19:27,448 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:19:27,448 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:19:27,448 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:19:27,449 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:19:27,449 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:19:27,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:19:27,450 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:19:27,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:19:27,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:19:27,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:19:27,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:19:27,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:19:27,451 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 13:19:27,451 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 13:19:27,451 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 13:19:27,451 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:19:27,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:19:27,452 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:19:27,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:19:27,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:19:27,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 13:19:27,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:19:27,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:19:27,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:19:27,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:19:27,454 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:19:27,454 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 13:19:27,454 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 13:19:27,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:19:27,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:19:27,455 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 13:19:27,455 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9dd43881ccf56b8e6da6d28cc61ed7f891fae597b16e121f5ac65378400d596 [2022-12-14 13:19:27,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:19:27,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:19:27,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:19:27,717 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:19:27,717 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:19:27,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-lopstr16/base_case.i [2022-12-14 13:19:30,302 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:19:30,463 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:19:30,464 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/sv-benchmarks/c/array-lopstr16/base_case.i [2022-12-14 13:19:30,469 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/data/1ef7cdfbd/4892cd8fc5284054943c8dce5bf9be7d/FLAG537c4240e [2022-12-14 13:19:30,481 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/data/1ef7cdfbd/4892cd8fc5284054943c8dce5bf9be7d [2022-12-14 13:19:30,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:19:30,484 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:19:30,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:19:30,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:19:30,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:19:30,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:19:30" (1/1) ... [2022-12-14 13:19:30,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@704370e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:19:30, skipping insertion in model container [2022-12-14 13:19:30,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:19:30" (1/1) ... [2022-12-14 13:19:30,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:19:30,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:19:30,619 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2022-12-14 13:19:30,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:19:30,647 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 13:19:30,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:19:30,653 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2022-12-14 13:19:30,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:19:30,664 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:19:30,674 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2022-12-14 13:19:30,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:19:30,693 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:19:30,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:19:30 WrapperNode [2022-12-14 13:19:30,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:19:30,694 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:19:30,694 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:19:30,694 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:19:30,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:19:30" (1/1) ... [2022-12-14 13:19:30,708 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:19:30" (1/1) ... [2022-12-14 13:19:30,727 INFO L138 Inliner]: procedures = 21, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2022-12-14 13:19:30,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:19:30,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:19:30,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:19:30,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:19:30,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:19:30" (1/1) ... [2022-12-14 13:19:30,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:19:30" (1/1) ... [2022-12-14 13:19:30,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:19:30" (1/1) ... [2022-12-14 13:19:30,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:19:30" (1/1) ... [2022-12-14 13:19:30,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:19:30" (1/1) ... [2022-12-14 13:19:30,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:19:30" (1/1) ... [2022-12-14 13:19:30,754 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:19:30" (1/1) ... [2022-12-14 13:19:30,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:19:30" (1/1) ... [2022-12-14 13:19:30,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:19:30,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:19:30,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:19:30,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:19:30,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:19:30" (1/1) ... [2022-12-14 13:19:30,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:19:30,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:19:30,783 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:19:30,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:19:30,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 13:19:30,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:19:30,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 13:19:30,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 13:19:30,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 13:19:30,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 13:19:30,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:19:30,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:19:30,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 13:19:30,893 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:19:30,895 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:19:31,086 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:19:31,090 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:19:31,091 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 13:19:31,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:19:31 BoogieIcfgContainer [2022-12-14 13:19:31,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:19:31,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:19:31,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:19:31,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:19:31,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:19:30" (1/3) ... [2022-12-14 13:19:31,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5086be4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:19:31, skipping insertion in model container [2022-12-14 13:19:31,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:19:30" (2/3) ... [2022-12-14 13:19:31,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5086be4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:19:31, skipping insertion in model container [2022-12-14 13:19:31,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:19:31" (3/3) ... [2022-12-14 13:19:31,099 INFO L112 eAbstractionObserver]: Analyzing ICFG base_case.i [2022-12-14 13:19:31,122 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:19:31,122 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:19:31,167 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:19:31,174 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@555874f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:19:31,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:19:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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) [2022-12-14 13:19:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 13:19:31,182 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:19:31,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:19:31,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:19:31,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:19:31,187 INFO L85 PathProgramCache]: Analyzing trace with hash 590963434, now seen corresponding path program 1 times [2022-12-14 13:19:31,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:19:31,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52028445] [2022-12-14 13:19:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:19:31,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:19:31,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:19:31,200 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:19:31,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 13:19:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:19:31,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 13:19:31,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:19:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:31,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:19:31,274 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:19:31,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52028445] [2022-12-14 13:19:31,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52028445] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:19:31,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:19:31,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:19:31,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467494497] [2022-12-14 13:19:31,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:19:31,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 13:19:31,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:19:31,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 13:19:31,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 13:19:31,302 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 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) [2022-12-14 13:19:31,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:19:31,313 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2022-12-14 13:19:31,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 13:19:31,314 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 [2022-12-14 13:19:31,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:19:31,320 INFO L225 Difference]: With dead ends: 30 [2022-12-14 13:19:31,320 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 13:19:31,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 13:19:31,324 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:19:31,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:19:31,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 13:19:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 13:19:31,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:19:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-12-14 13:19:31,351 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2022-12-14 13:19:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:19:31,352 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-12-14 13:19:31,352 INFO L496 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) [2022-12-14 13:19:31,352 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-12-14 13:19:31,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 13:19:31,352 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:19:31,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:19:31,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:19:31,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:19:31,554 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:19:31,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:19:31,556 INFO L85 PathProgramCache]: Analyzing trace with hash 218784471, now seen corresponding path program 1 times [2022-12-14 13:19:31,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:19:31,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504225357] [2022-12-14 13:19:31,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:19:31,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:19:31,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:19:31,562 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:19:31,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 13:19:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:19:31,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:19:31,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:19:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:31,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:19:31,751 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:19:31,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504225357] [2022-12-14 13:19:31,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504225357] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:19:31,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:19:31,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:19:31,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551992048] [2022-12-14 13:19:31,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:19:31,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:19:31,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:19:31,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:19:31,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:19:31,755 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:19:31,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:19:31,809 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2022-12-14 13:19:31,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:19:31,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 13:19:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:19:31,811 INFO L225 Difference]: With dead ends: 33 [2022-12-14 13:19:31,811 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 13:19:31,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:19:31,812 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:19:31,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 21 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:19:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 13:19:31,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 15. [2022-12-14 13:19:31,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:19:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-12-14 13:19:31,815 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2022-12-14 13:19:31,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:19:31,816 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-12-14 13:19:31,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:19:31,816 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-12-14 13:19:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 13:19:31,816 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:19:31,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:19:31,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 13:19:32,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:19:32,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:19:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:19:32,020 INFO L85 PathProgramCache]: Analyzing trace with hash 212359228, now seen corresponding path program 1 times [2022-12-14 13:19:32,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:19:32,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773385865] [2022-12-14 13:19:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:19:32,023 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:19:32,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:19:32,026 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:19:32,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 13:19:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:19:32,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:19:32,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:19:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:32,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:19:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:32,283 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:19:32,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773385865] [2022-12-14 13:19:32,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773385865] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:19:32,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1803748582] [2022-12-14 13:19:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:19:32,284 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:19:32,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:19:32,304 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:19:32,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-12-14 13:19:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:19:32,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:19:32,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:19:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:32,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:19:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:32,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1803748582] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:19:32,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855114012] [2022-12-14 13:19:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:19:32,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:19:32,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:19:32,445 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:19:32,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:19:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:19:32,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:19:32,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:19:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:32,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:19:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:32,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855114012] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:19:32,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:19:32,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2022-12-14 13:19:32,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923541909] [2022-12-14 13:19:32,536 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:19:32,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:19:32,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:19:32,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:19:32,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:19:32,538 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:19:32,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:19:32,675 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2022-12-14 13:19:32,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:19:32,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 13:19:32,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:19:32,677 INFO L225 Difference]: With dead ends: 57 [2022-12-14 13:19:32,677 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 13:19:32,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:19:32,678 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:19:32,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 47 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:19:32,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 13:19:32,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 27. [2022-12-14 13:19:32,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 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) [2022-12-14 13:19:32,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-12-14 13:19:32,684 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 12 [2022-12-14 13:19:32,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:19:32,685 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-12-14 13:19:32,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:19:32,685 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-12-14 13:19:32,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 13:19:32,685 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:19:32,686 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:19:32,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-12-14 13:19:32,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:19:33,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 13:19:33,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:19:33,290 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:19:33,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:19:33,291 INFO L85 PathProgramCache]: Analyzing trace with hash -2102142613, now seen corresponding path program 2 times [2022-12-14 13:19:33,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:19:33,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048047845] [2022-12-14 13:19:33,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:19:33,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:19:33,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:19:33,297 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:19:33,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 13:19:33,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:19:33,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:19:33,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:19:33,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:19:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:33,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:19:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:33,659 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:19:33,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048047845] [2022-12-14 13:19:33,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048047845] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:19:33,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1353727896] [2022-12-14 13:19:33,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:19:33,660 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:19:33,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:19:33,661 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:19:33,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-12-14 13:19:33,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:19:33,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:19:33,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:19:33,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:19:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:33,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:19:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:33,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1353727896] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:19:33,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092032740] [2022-12-14 13:19:33,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:19:33,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:19:33,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:19:33,939 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:19:33,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:19:34,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:19:34,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:19:34,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:19:34,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:19:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:34,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:19:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:34,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092032740] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:19:34,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:19:34,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2022-12-14 13:19:34,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720464185] [2022-12-14 13:19:34,142 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:19:34,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 13:19:34,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:19:34,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 13:19:34,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:19:34,144 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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) [2022-12-14 13:19:34,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:19:34,659 INFO L93 Difference]: Finished difference Result 123 states and 151 transitions. [2022-12-14 13:19:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:19:34,660 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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 24 [2022-12-14 13:19:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:19:34,662 INFO L225 Difference]: With dead ends: 123 [2022-12-14 13:19:34,662 INFO L226 Difference]: Without dead ends: 115 [2022-12-14 13:19:34,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:19:34,664 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 237 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:19:34,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 244 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:19:34,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-14 13:19:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 51. [2022-12-14 13:19:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 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) [2022-12-14 13:19:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-12-14 13:19:34,673 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 24 [2022-12-14 13:19:34,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:19:34,674 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-12-14 13:19:34,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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) [2022-12-14 13:19:34,674 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-12-14 13:19:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 13:19:34,676 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:19:34,676 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:19:34,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:19:34,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-12-14 13:19:35,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 13:19:35,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:19:35,279 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:19:35,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:19:35,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1900720201, now seen corresponding path program 3 times [2022-12-14 13:19:35,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:19:35,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800691292] [2022-12-14 13:19:35,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:19:35,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:19:35,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:19:35,285 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:19:35,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 13:19:37,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 13:19:37,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:19:37,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:19:37,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:19:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:37,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:19:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:38,237 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:19:38,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800691292] [2022-12-14 13:19:38,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800691292] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:19:38,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1890354607] [2022-12-14 13:19:38,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:19:38,238 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:19:38,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:19:38,238 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:19:38,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-12-14 13:19:38,421 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 13:19:38,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687124981] [2022-12-14 13:19:38,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:19:38,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 1 [2022-12-14 13:19:38,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:19:38,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:19:38,424 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:19:38,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ba36886-024a-4328-a6b6-1802ee344e42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process