./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/alternating_list-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/alternating_list-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P --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 941f3dd0e4566f414ae914eed10af26405f8e9f2f3d427c146090b07336d2fc2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:40:16,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:40:16,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:40:17,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:40:17,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:40:17,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:40:17,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:40:17,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:40:17,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:40:17,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:40:17,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:40:17,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:40:17,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:40:17,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:40:17,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:40:17,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:40:17,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:40:17,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:40:17,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:40:17,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:40:17,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:40:17,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:40:17,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:40:17,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:40:17,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:40:17,086 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:40:17,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:40:17,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:40:17,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:40:17,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:40:17,092 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:40:17,093 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:40:17,094 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:40:17,095 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:40:17,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:40:17,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:40:17,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:40:17,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:40:17,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:40:17,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:40:17,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:40:17,101 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:40:17,147 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:40:17,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:40:17,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:40:17,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:40:17,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:40:17,155 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:40:17,155 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:40:17,156 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:40:17,156 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:40:17,156 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:40:17,157 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:40:17,158 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:40:17,158 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:40:17,158 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:40:17,159 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:40:17,159 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:40:17,159 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:40:17,159 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:40:17,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:40:17,160 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:40:17,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:40:17,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:40:17,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:40:17,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:40:17,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:40:17,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:40:17,164 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:40:17,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:40:17,164 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:40:17,164 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:40:17,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:40:17,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:40:17,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:40:17,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:40:17,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:40:17,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:40:17,166 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:40:17,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:40:17,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:40:17,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:40:17,167 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:40:17,167 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 941f3dd0e4566f414ae914eed10af26405f8e9f2f3d427c146090b07336d2fc2 [2021-11-20 23:40:17,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:40:17,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:40:17,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:40:17,456 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:40:17,457 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:40:17,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-properties/alternating_list-1.i [2021-11-20 23:40:17,526 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/data/f85b01036/17926c2b0be940758727bd9107a69c7d/FLAG49c018591 [2021-11-20 23:40:18,063 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:40:18,063 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/sv-benchmarks/c/list-properties/alternating_list-1.i [2021-11-20 23:40:18,076 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/data/f85b01036/17926c2b0be940758727bd9107a69c7d/FLAG49c018591 [2021-11-20 23:40:18,356 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/data/f85b01036/17926c2b0be940758727bd9107a69c7d [2021-11-20 23:40:18,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:40:18,360 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:40:18,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:40:18,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:40:18,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:40:18,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:40:18" (1/1) ... [2021-11-20 23:40:18,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@782c4305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:18, skipping insertion in model container [2021-11-20 23:40:18,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:40:18" (1/1) ... [2021-11-20 23:40:18,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:40:18,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:40:18,721 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/sv-benchmarks/c/list-properties/alternating_list-1.i[23574,23587] [2021-11-20 23:40:18,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:40:18,731 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:40:18,772 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/sv-benchmarks/c/list-properties/alternating_list-1.i[23574,23587] [2021-11-20 23:40:18,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:40:18,824 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:40:18,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:18 WrapperNode [2021-11-20 23:40:18,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:40:18,826 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:40:18,826 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:40:18,826 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:40:18,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:18" (1/1) ... [2021-11-20 23:40:18,865 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:18" (1/1) ... [2021-11-20 23:40:18,885 INFO L137 Inliner]: procedures = 124, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 85 [2021-11-20 23:40:18,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:40:18,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:40:18,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:40:18,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:40:18,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:18" (1/1) ... [2021-11-20 23:40:18,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:18" (1/1) ... [2021-11-20 23:40:18,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:18" (1/1) ... [2021-11-20 23:40:18,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:18" (1/1) ... [2021-11-20 23:40:18,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:18" (1/1) ... [2021-11-20 23:40:18,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:18" (1/1) ... [2021-11-20 23:40:18,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:18" (1/1) ... [2021-11-20 23:40:18,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:40:18,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:40:18,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:40:18,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:40:18,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:18" (1/1) ... [2021-11-20 23:40:18,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:40:18,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:40:18,945 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:40:18,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:40:18,996 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-20 23:40:18,996 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-20 23:40:18,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:40:18,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:40:18,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:40:18,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:40:18,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:40:18,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:40:18,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:40:18,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:40:18,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:40:18,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:40:19,106 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:40:19,107 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:40:19,144 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-20 23:40:19,329 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:40:19,353 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:40:19,353 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 23:40:19,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:40:19 BoogieIcfgContainer [2021-11-20 23:40:19,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:40:19,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:40:19,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:40:19,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:40:19,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:40:18" (1/3) ... [2021-11-20 23:40:19,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231fcea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:40:19, skipping insertion in model container [2021-11-20 23:40:19,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:18" (2/3) ... [2021-11-20 23:40:19,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231fcea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:40:19, skipping insertion in model container [2021-11-20 23:40:19,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:40:19" (3/3) ... [2021-11-20 23:40:19,364 INFO L111 eAbstractionObserver]: Analyzing ICFG alternating_list-1.i [2021-11-20 23:40:19,369 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:40:19,370 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:40:19,433 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:40:19,440 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:40:19,441 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:40:19,459 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:19,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:40:19,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:19,464 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:40:19,465 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:19,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:19,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1696129172, now seen corresponding path program 1 times [2021-11-20 23:40:19,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:19,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675996596] [2021-11-20 23:40:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:19,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:19,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:19,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675996596] [2021-11-20 23:40:19,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675996596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:19,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:19,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:40:19,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42021617] [2021-11-20 23:40:19,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:19,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:40:19,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:19,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:40:19,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:40:19,688 INFO L87 Difference]: Start difference. First operand has 26 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:19,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:19,749 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2021-11-20 23:40:19,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:40:19,751 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 23:40:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:19,758 INFO L225 Difference]: With dead ends: 41 [2021-11-20 23:40:19,758 INFO L226 Difference]: Without dead ends: 16 [2021-11-20 23:40:19,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:40:19,765 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:19,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:40:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-20 23:40:19,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-20 23:40:19,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-20 23:40:19,800 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2021-11-20 23:40:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:19,801 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-20 23:40:19,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:19,801 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-20 23:40:19,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 23:40:19,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:19,803 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:40:19,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:40:19,805 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:19,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:19,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1961675887, now seen corresponding path program 1 times [2021-11-20 23:40:19,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:19,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391208764] [2021-11-20 23:40:19,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:19,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:19,900 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:19,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391208764] [2021-11-20 23:40:19,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391208764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:19,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:19,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:40:19,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130816937] [2021-11-20 23:40:19,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:19,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:40:19,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:19,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:40:19,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:40:19,903 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:19,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:19,930 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-11-20 23:40:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:40:19,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 23:40:19,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:19,931 INFO L225 Difference]: With dead ends: 33 [2021-11-20 23:40:19,932 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 23:40:19,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:40:19,934 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:19,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 28 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:40:19,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 23:40:19,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-11-20 23:40:19,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-20 23:40:19,941 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2021-11-20 23:40:19,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:19,942 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-20 23:40:19,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-20 23:40:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 23:40:19,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:19,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:40:19,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:40:19,946 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:19,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:19,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1961668943, now seen corresponding path program 1 times [2021-11-20 23:40:19,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:19,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274985948] [2021-11-20 23:40:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:19,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:20,038 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:20,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274985948] [2021-11-20 23:40:20,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274985948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:20,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:20,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:40:20,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414061210] [2021-11-20 23:40:20,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:20,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:40:20,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:20,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:40:20,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:40:20,044 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:20,132 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-11-20 23:40:20,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:40:20,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 23:40:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:20,134 INFO L225 Difference]: With dead ends: 46 [2021-11-20 23:40:20,134 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 23:40:20,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:40:20,136 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:20,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 42 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:40:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 23:40:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2021-11-20 23:40:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:20,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-20 23:40:20,142 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 11 [2021-11-20 23:40:20,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:20,142 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-20 23:40:20,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:20,143 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-20 23:40:20,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 23:40:20,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:20,143 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:40:20,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:40:20,144 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:20,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:20,145 INFO L85 PathProgramCache]: Analyzing trace with hash 499229541, now seen corresponding path program 1 times [2021-11-20 23:40:20,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:20,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289304530] [2021-11-20 23:40:20,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:20,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:20,335 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:20,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289304530] [2021-11-20 23:40:20,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289304530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:40:20,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729891432] [2021-11-20 23:40:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:20,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:40:20,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:40:20,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:40:20,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:40:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:20,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 23:40:20,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:40:20,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:40:20,632 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:40:20,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 23:40:20,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:40:20,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:40:20,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:20,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 23:40:20,866 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:40:20,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 23:40:21,032 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:40:21,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-20 23:40:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:21,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:40:21,595 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2021-11-20 23:40:22,326 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_29| Int) (v_DerPreprocessor_2 Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4) v_DerPreprocessor_2)))) (store .cse0 |c_ULTIMATE.start_main_~t~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_29| 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2021-11-20 23:40:22,381 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-20 23:40:22,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1803471835] [2021-11-20 23:40:22,399 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-20 23:40:22,399 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:40:22,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:40:22,409 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:40:22,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:40:22,460 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5733303e at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:388) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) 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:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.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.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:278) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:264) 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:116) 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.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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 23:40:22,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:40:22,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-20 23:40:22,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72738561] [2021-11-20 23:40:22,467 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 23:40:22,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:40:22,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:22,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:40:22,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=148, Unknown=2, NotChecked=50, Total=240 [2021-11-20 23:40:22,474 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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) [2021-11-20 23:40:22,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:40:22,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=40, Invalid=148, Unknown=2, NotChecked=50, Total=240 [2021-11-20 23:40:22,481 INFO L933 BasicCegarLoop]: 0 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, 0 SdHoareTripleChecker+Invalid, 1 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 [2021-11-20 23:40:22,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:40:22,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:40:22,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:40:22,706 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5733303e at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 23:40:22,708 INFO L158 Benchmark]: Toolchain (without parser) took 4348.36ms. Allocated memory was 117.4MB in the beginning and 146.8MB in the end (delta: 29.4MB). Free memory was 78.3MB in the beginning and 79.7MB in the end (delta: -1.4MB). Peak memory consumption was 26.7MB. Max. memory is 16.1GB. [2021-11-20 23:40:22,708 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 117.4MB. Free memory is still 96.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:40:22,709 INFO L158 Benchmark]: CACSL2BoogieTranslator took 447.16ms. Allocated memory is still 117.4MB. Free memory was 78.2MB in the beginning and 83.6MB in the end (delta: -5.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 23:40:22,709 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.78ms. Allocated memory is still 117.4MB. Free memory was 83.6MB in the beginning and 81.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:40:22,710 INFO L158 Benchmark]: Boogie Preprocessor took 25.66ms. Allocated memory is still 117.4MB. Free memory was 81.6MB in the beginning and 80.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:40:22,710 INFO L158 Benchmark]: RCFGBuilder took 443.03ms. Allocated memory is still 117.4MB. Free memory was 80.5MB in the beginning and 67.5MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-20 23:40:22,710 INFO L158 Benchmark]: TraceAbstraction took 3350.17ms. Allocated memory was 117.4MB in the beginning and 146.8MB in the end (delta: 29.4MB). Free memory was 67.0MB in the beginning and 79.7MB in the end (delta: -12.7MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. [2021-11-20 23:40:22,713 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 117.4MB. Free memory is still 96.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 447.16ms. Allocated memory is still 117.4MB. Free memory was 78.2MB in the beginning and 83.6MB in the end (delta: -5.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.78ms. Allocated memory is still 117.4MB. Free memory was 83.6MB in the beginning and 81.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.66ms. Allocated memory is still 117.4MB. Free memory was 81.6MB in the beginning and 80.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 443.03ms. Allocated memory is still 117.4MB. Free memory was 80.5MB in the beginning and 67.5MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 3350.17ms. Allocated memory was 117.4MB in the beginning and 146.8MB in the end (delta: 29.4MB). Free memory was 67.0MB in the beginning and 79.7MB in the end (delta: -12.7MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5733303e de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5733303e: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-20 23:40:22,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/alternating_list-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P --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 941f3dd0e4566f414ae914eed10af26405f8e9f2f3d427c146090b07336d2fc2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:40:25,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:40:25,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:40:25,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:40:25,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:40:25,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:40:25,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:40:25,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:40:25,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:40:25,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:40:25,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:40:25,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:40:25,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:40:25,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:40:25,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:40:25,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:40:25,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:40:25,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:40:25,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:40:25,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:40:25,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:40:25,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:40:25,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:40:25,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:40:25,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:40:25,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:40:25,261 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:40:25,262 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:40:25,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:40:25,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:40:25,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:40:25,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:40:25,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:40:25,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:40:25,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:40:25,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:40:25,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:40:25,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:40:25,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:40:25,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:40:25,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:40:25,288 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-20 23:40:25,328 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:40:25,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:40:25,329 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:40:25,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:40:25,330 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:40:25,330 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:40:25,330 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:40:25,330 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:40:25,331 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:40:25,331 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:40:25,332 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:40:25,332 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:40:25,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:40:25,333 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:40:25,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:40:25,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:40:25,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:40:25,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:40:25,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:40:25,335 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 23:40:25,335 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 23:40:25,335 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:40:25,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:40:25,335 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:40:25,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:40:25,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:40:25,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 23:40:25,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:40:25,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:40:25,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:40:25,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:40:25,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:40:25,337 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 23:40:25,338 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 23:40:25,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:40:25,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:40:25,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:40:25,339 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_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 941f3dd0e4566f414ae914eed10af26405f8e9f2f3d427c146090b07336d2fc2 [2021-11-20 23:40:25,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:40:25,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:40:25,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:40:25,752 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:40:25,752 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:40:25,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-properties/alternating_list-1.i [2021-11-20 23:40:25,831 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/data/3daf9bdf8/72c1703bc79f476aaa38102ca7e72ca9/FLAG0d155da77 [2021-11-20 23:40:26,428 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:40:26,430 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/sv-benchmarks/c/list-properties/alternating_list-1.i [2021-11-20 23:40:26,450 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/data/3daf9bdf8/72c1703bc79f476aaa38102ca7e72ca9/FLAG0d155da77 [2021-11-20 23:40:26,677 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/data/3daf9bdf8/72c1703bc79f476aaa38102ca7e72ca9 [2021-11-20 23:40:26,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:40:26,682 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:40:26,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:40:26,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:40:26,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:40:26,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:40:26" (1/1) ... [2021-11-20 23:40:26,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1523f4fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:26, skipping insertion in model container [2021-11-20 23:40:26,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:40:26" (1/1) ... [2021-11-20 23:40:26,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:40:26,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:40:27,036 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/sv-benchmarks/c/list-properties/alternating_list-1.i[23574,23587] [2021-11-20 23:40:27,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:40:27,051 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:40:27,091 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/sv-benchmarks/c/list-properties/alternating_list-1.i[23574,23587] [2021-11-20 23:40:27,092 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:40:27,125 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:40:27,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:27 WrapperNode [2021-11-20 23:40:27,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:40:27,127 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:40:27,128 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:40:27,128 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:40:27,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:27" (1/1) ... [2021-11-20 23:40:27,152 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:27" (1/1) ... [2021-11-20 23:40:27,173 INFO L137 Inliner]: procedures = 127, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 85 [2021-11-20 23:40:27,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:40:27,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:40:27,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:40:27,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:40:27,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:27" (1/1) ... [2021-11-20 23:40:27,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:27" (1/1) ... [2021-11-20 23:40:27,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:27" (1/1) ... [2021-11-20 23:40:27,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:27" (1/1) ... [2021-11-20 23:40:27,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:27" (1/1) ... [2021-11-20 23:40:27,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:27" (1/1) ... [2021-11-20 23:40:27,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:27" (1/1) ... [2021-11-20 23:40:27,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:40:27,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:40:27,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:40:27,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:40:27,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:27" (1/1) ... [2021-11-20 23:40:27,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:40:27,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:40:27,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:40:27,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:40:27,308 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-20 23:40:27,308 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-20 23:40:27,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 23:40:27,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:40:27,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:40:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:40:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:40:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:40:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 23:40:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 23:40:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:40:27,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:40:27,478 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:40:27,495 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:40:27,543 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-20 23:40:27,737 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:40:27,743 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:40:27,750 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 23:40:27,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:40:27 BoogieIcfgContainer [2021-11-20 23:40:27,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:40:27,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:40:27,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:40:27,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:40:27,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:40:26" (1/3) ... [2021-11-20 23:40:27,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e95806c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:40:27, skipping insertion in model container [2021-11-20 23:40:27,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:27" (2/3) ... [2021-11-20 23:40:27,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e95806c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:40:27, skipping insertion in model container [2021-11-20 23:40:27,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:40:27" (3/3) ... [2021-11-20 23:40:27,761 INFO L111 eAbstractionObserver]: Analyzing ICFG alternating_list-1.i [2021-11-20 23:40:27,766 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:40:27,767 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:40:27,831 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:40:27,847 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:40:27,848 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:40:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 25 states have (on average 1.52) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:27,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 23:40:27,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:27,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:40:27,873 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:27,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:27,879 INFO L85 PathProgramCache]: Analyzing trace with hash 331174648, now seen corresponding path program 1 times [2021-11-20 23:40:27,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:40:27,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413955815] [2021-11-20 23:40:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:27,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:40:27,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:40:27,896 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:40:27,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 23:40:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:28,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:40:28,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:40:28,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:40:28,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 23:40:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:28,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:40:28,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-20 23:40:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:28,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:40:28,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413955815] [2021-11-20 23:40:28,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413955815] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:28,397 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:28,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 23:40:28,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503230424] [2021-11-20 23:40:28,403 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:28,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:40:28,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:40:28,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:40:28,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:40:28,449 INFO L87 Difference]: Start difference. First operand has 29 states, 25 states have (on average 1.52) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:28,685 INFO L93 Difference]: Finished difference Result 76 states and 106 transitions. [2021-11-20 23:40:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:40:28,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 23:40:28,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:28,695 INFO L225 Difference]: With dead ends: 76 [2021-11-20 23:40:28,695 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 23:40:28,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:40:28,701 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:28,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 88 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:40:28,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 23:40:28,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2021-11-20 23:40:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-20 23:40:28,735 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2021-11-20 23:40:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:28,735 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-20 23:40:28,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-20 23:40:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 23:40:28,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:28,737 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:40:28,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:40:28,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:40:28,938 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:28,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:28,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1170768700, now seen corresponding path program 1 times [2021-11-20 23:40:28,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:40:28,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142534928] [2021-11-20 23:40:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:28,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:40:28,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:40:28,942 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:40:28,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 23:40:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:29,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 23:40:29,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:40:29,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:40:29,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:29,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 23:40:29,378 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:40:29,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-11-20 23:40:29,620 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:40:29,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-11-20 23:40:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:29,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:40:31,763 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~p~0#1.base| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| (_ bv3 32))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv3 32)) (= .cse0 (_ bv1 32))))) is different from false [2021-11-20 23:40:33,869 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_26| (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_1)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_26| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_26|) |c_ULTIMATE.start_main_~t~0#1.offset| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv3 32)) (= .cse0 (_ bv1 32))))) is different from false [2021-11-20 23:40:35,944 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_26| (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_1)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_26| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_26|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv3 32)) (= .cse0 (_ bv1 32))))) is different from false [2021-11-20 23:40:35,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 519 treesize of output 503 [2021-11-20 23:40:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-20 23:40:37,943 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:40:37,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142534928] [2021-11-20 23:40:37,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142534928] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:40:37,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1795084957] [2021-11-20 23:40:37,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:37,944 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:40:37,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:40:37,947 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:40:37,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-20 23:40:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:38,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 23:40:38,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:40:38,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:40:38,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:40:38,329 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:40:38,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-20 23:40:38,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:38,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 23:40:38,549 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:40:38,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 23:40:38,713 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:40:38,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-20 23:40:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:38,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:40:52,358 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_31| (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32))) (= (_ bv1 32) (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_2)))) (store .cse0 |c_ULTIMATE.start_main_~t~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_31| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2021-11-20 23:40:56,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 212 [2021-11-20 23:41:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:41:00,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1795084957] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:41:00,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900432878] [2021-11-20 23:41:00,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:00,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:41:00,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:41:00,907 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:41:00,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:41:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:00,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 23:41:00,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:41:00,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:41:03,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:41:03,184 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:41:03,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-11-20 23:41:03,306 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 23:41:03,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 23:41:05,402 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:41:05,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 23:41:05,542 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:41:05,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-20 23:41:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:41:05,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:41:20,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 212 [2021-11-20 23:41:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:41:20,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900432878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:41:20,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:41:20,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9, 9, 9, 9] total 35 [2021-11-20 23:41:20,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594388018] [2021-11-20 23:41:20,411 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:41:20,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 23:41:20,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:41:20,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 23:41:20,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=768, Unknown=18, NotChecked=244, Total=1190 [2021-11-20 23:41:20,415 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:41:22,480 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset|) (_ bv1 32)) (= |c_ULTIMATE.start_main_~p~0#1.offset| |c_ULTIMATE.start_main_~a~0#1.offset|) (forall ((|v_ULTIMATE.start_main_~p~0#1.base_26| (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_1)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_26| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_26|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv3 32)) (= .cse0 (_ bv1 32))))) (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~p~0#1.base|) (= |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~a~0#1.base|)) (_ bv1 1)))) is different from false [2021-11-20 23:41:24,519 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~t~0#1.base|)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset|) (_ bv1 32)) (= |c_ULTIMATE.start_main_~p~0#1.offset| |c_ULTIMATE.start_main_~a~0#1.offset|) (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~p~0#1.base|) (= |c_ULTIMATE.start_main_~t~0#1.offset| (_ bv0 32)) (forall ((|v_ULTIMATE.start_main_~p~0#1.base_26| (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_1)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_26| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_26|) |c_ULTIMATE.start_main_~t~0#1.offset| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv3 32)) (= .cse0 (_ bv1 32))))) (= |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32)) (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_31| (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32))) (= (_ bv1 32) (select (select (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_2)))) (store .cse2 |c_ULTIMATE.start_main_~t~0#1.base| (store (select .cse2 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_31| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-20 23:41:26,553 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~p~0#1.base|)) (= |c_ULTIMATE.start_main_~p~0#1.offset| (_ bv0 32)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32)) (forall ((|ULTIMATE.start_main_~p~0#1.base| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| (_ bv3 32))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv3 32)) (= .cse0 (_ bv1 32))))) (= |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32))) is different from false [2021-11-20 23:41:26,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:41:26,894 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2021-11-20 23:41:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:41:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 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 16 [2021-11-20 23:41:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:41:26,896 INFO L225 Difference]: With dead ends: 50 [2021-11-20 23:41:26,896 INFO L226 Difference]: Without dead ends: 48 [2021-11-20 23:41:26,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 53.2s TimeCoverageRelationStatistics Valid=176, Invalid=823, Unknown=21, NotChecked=462, Total=1482 [2021-11-20 23:41:26,898 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 78 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:41:26,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 267 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 126 Invalid, 0 Unknown, 224 Unchecked, 0.3s Time] [2021-11-20 23:41:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-20 23:41:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 29. [2021-11-20 23:41:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:41:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-11-20 23:41:26,905 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2021-11-20 23:41:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:41:26,906 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-11-20 23:41:26,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:41:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-11-20 23:41:26,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 23:41:26,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:41:26,907 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:41:26,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:41:27,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-20 23:41:27,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-20 23:41:27,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:41:27,522 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:41:27,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:41:27,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1170761756, now seen corresponding path program 1 times [2021-11-20 23:41:27,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:41:27,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599991012] [2021-11-20 23:41:27,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:27,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:41:27,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:41:27,526 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:41:27,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 23:41:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:27,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:41:27,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:41:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:41:27,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:41:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:41:27,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:41:27,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599991012] [2021-11-20 23:41:27,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599991012] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:41:27,675 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:41:27,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:41:27,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112788780] [2021-11-20 23:41:27,675 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:41:27,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:41:27,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:41:27,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:41:27,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:41:27,676 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:41:27,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:41:27,699 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2021-11-20 23:41:27,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:41:27,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 16 [2021-11-20 23:41:27,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:41:27,701 INFO L225 Difference]: With dead ends: 55 [2021-11-20 23:41:27,701 INFO L226 Difference]: Without dead ends: 41 [2021-11-20 23:41:27,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:41:27,702 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:41:27,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:41:27,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-20 23:41:27,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-11-20 23:41:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:41:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-11-20 23:41:27,710 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 16 [2021-11-20 23:41:27,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:41:27,710 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-11-20 23:41:27,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:41:27,711 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-11-20 23:41:27,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 23:41:27,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:41:27,712 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:41:27,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:41:27,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:41:27,924 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:41:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:41:27,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1106559332, now seen corresponding path program 1 times [2021-11-20 23:41:27,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:41:27,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102422065] [2021-11-20 23:41:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:27,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:41:27,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:41:27,930 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:41:27,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 23:41:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:27,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:41:27,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:41:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:41:28,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:41:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:41:28,071 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:41:28,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102422065] [2021-11-20 23:41:28,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102422065] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:41:28,072 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:41:28,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 23:41:28,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169756389] [2021-11-20 23:41:28,072 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:41:28,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:41:28,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:41:28,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:41:28,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:41:28,074 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:41:28,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:41:28,107 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-11-20 23:41:28,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:41:28,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 21 [2021-11-20 23:41:28,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:41:28,108 INFO L225 Difference]: With dead ends: 64 [2021-11-20 23:41:28,108 INFO L226 Difference]: Without dead ends: 41 [2021-11-20 23:41:28,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:41:28,110 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:41:28,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 38 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:41:28,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-20 23:41:28,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-11-20 23:41:28,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 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) [2021-11-20 23:41:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-20 23:41:28,117 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 21 [2021-11-20 23:41:28,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:41:28,118 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-20 23:41:28,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:41:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-20 23:41:28,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 23:41:28,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:41:28,119 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:41:28,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:41:28,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:41:28,330 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:41:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:41:28,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1106566276, now seen corresponding path program 1 times [2021-11-20 23:41:28,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:41:28,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103762663] [2021-11-20 23:41:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:28,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:41:28,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:41:28,332 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:41:28,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 23:41:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:28,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 23:41:28,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:41:28,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:41:28,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:41:28,646 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-20 23:41:28,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 89 [2021-11-20 23:41:28,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 74 [2021-11-20 23:41:28,675 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-20 23:41:28,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 52 [2021-11-20 23:41:28,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-11-20 23:41:28,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-20 23:41:28,945 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:41:28,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-11-20 23:41:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:41:28,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:41:29,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:41:29,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 111 [2021-11-20 23:41:29,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 123 [2021-11-20 23:41:29,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 146 [2021-11-20 23:41:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:41:29,902 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:41:29,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103762663] [2021-11-20 23:41:29,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103762663] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:41:29,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [793034160] [2021-11-20 23:41:29,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:29,902 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:41:29,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:41:29,903 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:41:29,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-20 23:41:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:29,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 23:41:29,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:41:30,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:41:30,204 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:41:30,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-20 23:41:30,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 23:41:30,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:41:30,522 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-20 23:41:30,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 93 [2021-11-20 23:41:30,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 84 [2021-11-20 23:41:30,556 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-20 23:41:30,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 62 [2021-11-20 23:41:30,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-11-20 23:41:30,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-11-20 23:41:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:41:30,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:41:30,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2021-11-20 23:41:31,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 188 [2021-11-20 23:41:31,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:41:31,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:41:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:41:35,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [793034160] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:41:35,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618386495] [2021-11-20 23:41:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:35,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:41:35,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:41:35,786 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:41:35,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 23:41:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:35,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 23:41:35,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:41:35,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:41:35,958 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:41:35,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-11-20 23:41:36,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:41:36,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 23:41:36,213 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-20 23:41:36,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 84 [2021-11-20 23:41:36,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 75 [2021-11-20 23:41:36,236 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-20 23:41:36,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 59 [2021-11-20 23:41:36,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-11-20 23:41:36,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-20 23:41:36,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 23:41:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:41:36,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:41:36,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2021-11-20 23:41:36,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 188 [2021-11-20 23:41:36,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:41:36,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:41:36,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:41:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:41:41,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618386495] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:41:41,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:41:41,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9, 9, 9, 9] total 36 [2021-11-20 23:41:41,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977580372] [2021-11-20 23:41:41,233 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:41:41,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 23:41:41,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:41:41,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 23:41:41,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1069, Unknown=4, NotChecked=0, Total=1260 [2021-11-20 23:41:41,236 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:41:42,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:41:42,239 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-11-20 23:41:42,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 23:41:42,240 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 states have internal predecessors, (86), 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 21 [2021-11-20 23:41:42,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:41:42,241 INFO L225 Difference]: With dead ends: 57 [2021-11-20 23:41:42,241 INFO L226 Difference]: Without dead ends: 37 [2021-11-20 23:41:42,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=299, Invalid=1589, Unknown=4, NotChecked=0, Total=1892 [2021-11-20 23:41:42,243 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:41:42,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 135 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 178 Invalid, 0 Unknown, 62 Unchecked, 0.6s Time] [2021-11-20 23:41:42,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-20 23:41:42,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-11-20 23:41:42,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:41:42,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-11-20 23:41:42,250 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 21 [2021-11-20 23:41:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:41:42,250 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-11-20 23:41:42,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:41:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-11-20 23:41:42,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 23:41:42,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:41:42,251 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:41:42,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:41:42,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-20 23:41:42,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 23:41:42,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:41:42,866 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:41:42,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:41:42,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1936394246, now seen corresponding path program 1 times [2021-11-20 23:41:42,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:41:42,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779272086] [2021-11-20 23:41:42,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:42,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:41:42,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:41:42,867 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:41:42,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 23:41:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:42,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 23:41:42,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:41:42,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:41:43,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:41:43,118 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:41:43,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-20 23:41:43,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:41:43,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 23:41:43,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-20 23:41:43,496 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-20 23:41:43,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2021-11-20 23:41:43,694 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-11-20 23:41:43,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2021-11-20 23:41:44,452 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:41:44,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-11-20 23:41:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:41:44,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:41:46,751 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (|ULTIMATE.start_main_~t~0#1.base| (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_10)))) (store .cse1 |ULTIMATE.start_main_~t~0#1.base| (store (select .cse1 |ULTIMATE.start_main_~t~0#1.base|) |c_ULTIMATE.start_main_~t~0#1.offset| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= (_ bv3 32) .cse0) (= .cse0 (_ bv1 32))))) is different from false [2021-11-20 23:41:48,795 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (|ULTIMATE.start_main_~t~0#1.base| (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_10)))) (store .cse1 |ULTIMATE.start_main_~t~0#1.base| (store (select .cse1 |ULTIMATE.start_main_~t~0#1.base|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-11-20 23:41:50,820 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~p~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_10 (_ BitVec 32)) (|ULTIMATE.start_main_~t~0#1.base| (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| (_ bv2 32)) (bvadd (_ bv4 32) |ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_10)))) (store .cse1 |ULTIMATE.start_main_~t~0#1.base| (store (select .cse1 |ULTIMATE.start_main_~t~0#1.base|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-11-20 23:41:52,906 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~t~0#1.base_26| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_73| (_ BitVec 32)) (v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_11)))) (store .cse2 |c_ULTIMATE.start_main_~t~0#1.base| (store (store (select .cse2 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_73| (_ bv2 32)) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_73|) v_DerPreprocessor_10))))) (store .cse1 |v_ULTIMATE.start_main_~t~0#1.base_26| (store (select .cse1 |v_ULTIMATE.start_main_~t~0#1.base_26|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-11-20 23:42:07,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3297 treesize of output 3265 [2021-11-20 23:42:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-20 23:42:51,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:42:51,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779272086] [2021-11-20 23:42:51,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779272086] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:42:51,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1016889719] [2021-11-20 23:42:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:42:51,963 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:42:51,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:42:51,964 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:42:51,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-20 23:42:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:42:52,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 23:42:52,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:42:52,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:42:52,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:42:52,196 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:42:52,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-11-20 23:42:52,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:42:52,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 23:42:52,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-20 23:42:52,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2021-11-20 23:42:52,403 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-20 23:42:52,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2021-11-20 23:42:52,548 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-11-20 23:42:52,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2021-11-20 23:42:53,224 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:42:53,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-11-20 23:42:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:42:53,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:42:53,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 51 [2021-11-20 23:42:55,309 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_71 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_12)))) (store .cse1 v_arrayElimCell_71 (store (select .cse1 v_arrayElimCell_71) |c_ULTIMATE.start_main_~t~0#1.offset| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv3 32)) (= .cse0 (_ bv1 32))))) is different from false [2021-11-20 23:42:57,357 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_71 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_12)))) (store .cse1 v_arrayElimCell_71 (store (select .cse1 v_arrayElimCell_71) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= (_ bv3 32) .cse0) (= .cse0 (_ bv1 32))))) is different from false [2021-11-20 23:42:59,384 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~p~0#1.offset| (_ BitVec 32)) (v_arrayElimCell_71 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| (_ bv2 32)) (bvadd (_ bv4 32) |ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_12)))) (store .cse1 v_arrayElimCell_71 (store (select .cse1 v_arrayElimCell_71) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv1 32)) (= (_ bv3 32) .cse0)))) is different from false [2021-11-20 23:43:01,443 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_13 (_ BitVec 32)) (v_arrayElimCell_71 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_82| (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_13)))) (store .cse2 |c_ULTIMATE.start_main_~t~0#1.base| (store (store (select .cse2 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_82| (_ bv2 32)) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_82|) v_DerPreprocessor_12))))) (store .cse1 v_arrayElimCell_71 (store (select .cse1 v_arrayElimCell_71) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-11-20 23:43:07,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3297 treesize of output 3265 [2021-11-20 23:43:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-20 23:43:57,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1016889719] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:43:57,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408441453] [2021-11-20 23:43:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:57,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:43:57,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:43:57,610 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:43:57,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 23:43:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:57,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 23:43:57,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:43:57,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:43:59,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:44:01,938 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 23:44:01,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-11-20 23:44:02,077 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 23:44:02,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 23:44:02,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-20 23:44:02,292 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-20 23:44:02,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2021-11-20 23:44:02,465 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-20 23:44:02,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 29 [2021-11-20 23:44:02,649 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-20 23:44:02,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2021-11-20 23:44:03,032 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-20 23:44:03,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-11-20 23:44:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:44:03,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:44:05,063 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~p~0#1.offset| (_ BitVec 32))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| (_ bv3 32))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-20 23:44:07,086 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_14 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_90| (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_14)))) (store .cse0 |c_ULTIMATE.start_main_~t~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_90| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) is different from false [2021-11-20 23:44:09,140 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~t~0#1.base_34| (_ BitVec 32))) (or (forall ((v_DerPreprocessor_14 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_90| (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_14)))) (store .cse0 |v_ULTIMATE.start_main_~t~0#1.base_34| (store (select .cse0 |v_ULTIMATE.start_main_~t~0#1.base_34|) |v_ULTIMATE.start_main_~p~0#1.offset_90| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_34|))))) is different from false [2021-11-20 23:44:11,180 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~t~0#1.base_34| (_ BitVec 32)) (|ULTIMATE.start_main_~p~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_90| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_34|))) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| (_ bv2 32)) (bvadd (_ bv4 32) |ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_14)))) (store .cse0 |v_ULTIMATE.start_main_~t~0#1.base_34| (store (select .cse0 |v_ULTIMATE.start_main_~t~0#1.base_34|) |v_ULTIMATE.start_main_~p~0#1.offset_90| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32)))) is different from false [2021-11-20 23:44:13,272 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~t~0#1.base_34| (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_92| (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_90| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_34|))) (= (_ bv1 32) (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_15)))) (store .cse1 |c_ULTIMATE.start_main_~t~0#1.base| (store (store (select .cse1 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_92| (_ bv2 32)) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_92|) v_DerPreprocessor_14))))) (store .cse0 |v_ULTIMATE.start_main_~t~0#1.base_34| (store (select .cse0 |v_ULTIMATE.start_main_~t~0#1.base_34|) |v_ULTIMATE.start_main_~p~0#1.offset_90| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-20 23:44:15,428 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~t~0#1.base_35| (_ BitVec 32)) (|v_ULTIMATE.start_main_~t~0#1.base_34| (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_92| (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_90| (_ BitVec 32))) (or (not (= (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_35| (_ bv1 1)) |v_ULTIMATE.start_main_~t~0#1.base_34|)))))) (_ bv0 1))) (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_15)))) (store .cse1 |v_ULTIMATE.start_main_~t~0#1.base_35| (store (store (select .cse1 |v_ULTIMATE.start_main_~t~0#1.base_35|) |v_ULTIMATE.start_main_~p~0#1.offset_92| (_ bv2 32)) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_92|) v_DerPreprocessor_14))))) (store .cse0 |v_ULTIMATE.start_main_~t~0#1.base_34| (store (select .cse0 |v_ULTIMATE.start_main_~t~0#1.base_34|) |v_ULTIMATE.start_main_~p~0#1.offset_90| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32)) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_35|))))) is different from false [2021-11-20 23:44:15,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3002 treesize of output 2970 [2021-11-20 23:44:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-20 23:44:43,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408441453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:44:43,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:44:43,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 12, 12] total 45 [2021-11-20 23:44:43,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427168056] [2021-11-20 23:44:43,441 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:44:43,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 23:44:43,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:44:43,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 23:44:43,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=786, Unknown=25, NotChecked=994, Total=1980 [2021-11-20 23:44:43,443 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:44:45,591 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~t~0#1.base|)))) (not (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~t~0#1.base|)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset|) (_ bv1 32)) (= |c_ULTIMATE.start_main_~p~0#1.offset| |c_ULTIMATE.start_main_~a~0#1.offset|) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~a~0#1.base|)))))))) (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~p~0#1.base|) (forall ((|v_ULTIMATE.start_main_~t~0#1.base_26| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_73| (_ BitVec 32)) (v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_11)))) (store .cse2 |c_ULTIMATE.start_main_~t~0#1.base| (store (store (select .cse2 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_73| (_ bv2 32)) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_73|) v_DerPreprocessor_10))))) (store .cse1 |v_ULTIMATE.start_main_~t~0#1.base_26| (store (select .cse1 |v_ULTIMATE.start_main_~t~0#1.base_26|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) (forall ((|v_ULTIMATE.start_main_~t~0#1.base_34| (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_92| (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_90| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_34|))) (= (_ bv1 32) (select (select (let ((.cse3 (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_15)))) (store .cse4 |c_ULTIMATE.start_main_~t~0#1.base| (store (store (select .cse4 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_92| (_ bv2 32)) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_92|) v_DerPreprocessor_14))))) (store .cse3 |v_ULTIMATE.start_main_~t~0#1.base_34| (store (select .cse3 |v_ULTIMATE.start_main_~t~0#1.base_34|) |v_ULTIMATE.start_main_~p~0#1.offset_90| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (forall ((v_DerPreprocessor_13 (_ BitVec 32)) (v_arrayElimCell_71 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_82| (_ BitVec 32))) (let ((.cse5 (select (select (let ((.cse6 (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_13)))) (store .cse7 |c_ULTIMATE.start_main_~t~0#1.base| (store (store (select .cse7 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_82| (_ bv2 32)) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_82|) v_DerPreprocessor_12))))) (store .cse6 v_arrayElimCell_71 (store (select .cse6 v_arrayElimCell_71) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse5 (_ bv1 32)) (= .cse5 (_ bv3 32))))) (= |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32))) is different from false [2021-11-20 23:44:47,610 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~p~0#1.base|)) (forall ((|ULTIMATE.start_main_~p~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_10 (_ BitVec 32)) (|ULTIMATE.start_main_~t~0#1.base| (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| (_ bv2 32)) (bvadd (_ bv4 32) |ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_10)))) (store .cse1 |ULTIMATE.start_main_~t~0#1.base| (store (select .cse1 |ULTIMATE.start_main_~t~0#1.base|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~a~0#1.base|)))))))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~p~0#1.base|)) (_ bv1 1))) (forall ((|ULTIMATE.start_main_~p~0#1.offset| (_ BitVec 32)) (v_arrayElimCell_71 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (let ((.cse2 (select (select (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| (_ bv2 32)) (bvadd (_ bv4 32) |ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_12)))) (store .cse3 v_arrayElimCell_71 (store (select .cse3 v_arrayElimCell_71) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse2 (_ bv1 32)) (= (_ bv3 32) .cse2)))) (forall ((|v_ULTIMATE.start_main_~t~0#1.base_34| (_ BitVec 32)) (|ULTIMATE.start_main_~p~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_90| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_34|))) (= (select (select (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| (_ bv2 32)) (bvadd (_ bv4 32) |ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_14)))) (store .cse4 |v_ULTIMATE.start_main_~t~0#1.base_34| (store (select .cse4 |v_ULTIMATE.start_main_~t~0#1.base_34|) |v_ULTIMATE.start_main_~p~0#1.offset_90| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32))) is different from false [2021-11-20 23:44:49,623 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~p~0#1.base|)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~a~0#1.base|)))))))) (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (|ULTIMATE.start_main_~t~0#1.base| (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_10)))) (store .cse1 |ULTIMATE.start_main_~t~0#1.base| (store (select .cse1 |ULTIMATE.start_main_~t~0#1.base|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) (forall ((|v_ULTIMATE.start_main_~t~0#1.base_34| (_ BitVec 32))) (or (forall ((v_DerPreprocessor_14 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_90| (_ BitVec 32))) (= (select (select (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_14)))) (store .cse2 |v_ULTIMATE.start_main_~t~0#1.base_34| (store (select .cse2 |v_ULTIMATE.start_main_~t~0#1.base_34|) |v_ULTIMATE.start_main_~p~0#1.offset_90| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_34|))))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32)) (= (_ bv2 32) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset|)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~p~0#1.base|)) (_ bv1 1))) (= |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32)) (forall ((v_arrayElimCell_71 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (let ((.cse3 (select (select (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_12)))) (store .cse4 v_arrayElimCell_71 (store (select .cse4 v_arrayElimCell_71) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= (_ bv3 32) .cse3) (= .cse3 (_ bv1 32)))))) is different from false [2021-11-20 23:44:51,640 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~p~0#1.base|)) (forall ((v_arrayElimCell_71 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_12)))) (store .cse1 v_arrayElimCell_71 (store (select .cse1 v_arrayElimCell_71) |c_ULTIMATE.start_main_~t~0#1.offset| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv3 32)) (= .cse0 (_ bv1 32))))) (not (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~t~0#1.base|)) (= |c_ULTIMATE.start_main_~t~0#1.offset| (_ bv0 32)) (forall ((v_DerPreprocessor_14 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_90| (_ BitVec 32))) (= (select (select (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_14)))) (store .cse2 |c_ULTIMATE.start_main_~t~0#1.base| (store (select .cse2 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_90| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32)) (= (_ bv2 32) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset|)) (not (= |c_ULTIMATE.start_main_~p~0#1.base| |c_ULTIMATE.start_main_~t~0#1.base|)) (= |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32)) (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (|ULTIMATE.start_main_~t~0#1.base| (_ BitVec 32))) (let ((.cse3 (select (select (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_10)))) (store .cse4 |ULTIMATE.start_main_~t~0#1.base| (store (select .cse4 |ULTIMATE.start_main_~t~0#1.base|) |c_ULTIMATE.start_main_~t~0#1.offset| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= (_ bv3 32) .cse3) (= .cse3 (_ bv1 32)))))) is different from false [2021-11-20 23:45:05,885 WARN L227 SmtUtils]: Spent 14.17s on a formula simplification. DAG size of input: 44 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:45:06,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:45:06,182 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-11-20 23:45:06,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 23:45:06,183 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 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 21 [2021-11-20 23:45:06,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:45:06,184 INFO L225 Difference]: With dead ends: 48 [2021-11-20 23:45:06,184 INFO L226 Difference]: Without dead ends: 46 [2021-11-20 23:45:06,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 75 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 18 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 90.7s TimeCoverageRelationStatistics Valid=207, Invalid=958, Unknown=29, NotChecked=1458, Total=2652 [2021-11-20 23:45:06,186 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:45:06,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 207 Unchecked, 0.1s Time] [2021-11-20 23:45:06,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-20 23:45:06,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-11-20 23:45:06,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-11-20 23:45:06,193 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 21 [2021-11-20 23:45:06,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:45:06,194 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-11-20 23:45:06,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:06,194 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-11-20 23:45:06,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 23:45:06,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:06,195 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:45:06,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 23:45:06,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 23:45:06,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-20 23:45:06,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 23:45:06,818 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:45:06,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:06,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1577979122, now seen corresponding path program 1 times [2021-11-20 23:45:06,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:45:06,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095358689] [2021-11-20 23:45:06,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:06,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:45:06,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:45:06,820 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:45:06,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 23:45:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:06,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 23:45:06,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:45:06,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:45:07,044 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:45:07,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-20 23:45:07,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:45:07,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 23:45:07,237 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-20 23:45:07,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2021-11-20 23:45:07,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-20 23:45:07,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:45:07,570 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-11-20 23:45:07,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 134 [2021-11-20 23:45:07,604 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-20 23:45:07,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 121 [2021-11-20 23:45:07,634 INFO L354 Elim1Store]: treesize reduction 75, result has 20.2 percent of original size [2021-11-20 23:45:07,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 151 treesize of output 105 [2021-11-20 23:45:07,895 INFO L354 Elim1Store]: treesize reduction 132, result has 15.9 percent of original size [2021-11-20 23:45:07,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 335 treesize of output 172 [2021-11-20 23:45:07,945 INFO L354 Elim1Store]: treesize reduction 124, result has 15.6 percent of original size [2021-11-20 23:45:07,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 230 treesize of output 133 [2021-11-20 23:45:07,980 INFO L354 Elim1Store]: treesize reduction 69, result has 40.5 percent of original size [2021-11-20 23:45:07,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 116 [2021-11-20 23:45:08,419 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-20 23:45:08,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 63 [2021-11-20 23:45:08,425 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:45:08,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 40 [2021-11-20 23:45:08,756 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-11-20 23:45:08,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 25 [2021-11-20 23:45:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:45:08,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:46:01,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:46:01,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8534 treesize of output 7987 [2021-11-20 23:46:52,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12140 treesize of output 11972 [2021-11-20 23:46:53,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24087 treesize of output 23883 [2021-11-20 23:46:53,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:46:53,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095358689] [2021-11-20 23:46:53,907 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 23:46:53,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [809658401] [2021-11-20 23:46:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:53,907 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:46:53,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:46:53,909 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:46:53,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-20 23:46:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:54,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 23:46:54,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:46:54,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:46:54,155 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 23:46:54,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-11-20 23:46:54,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 23:46:54,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:46:54,607 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-20 23:46:54,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 26 [2021-11-20 23:46:54,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:46:54,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:54,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-20 23:46:54,895 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-20 23:46:54,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 43 [2021-11-20 23:46:55,175 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-11-20 23:46:55,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 142 [2021-11-20 23:46:55,202 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-20 23:46:55,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 159 [2021-11-20 23:46:55,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 109 [2021-11-20 23:46:55,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:55,592 INFO L354 Elim1Store]: treesize reduction 78, result has 17.9 percent of original size [2021-11-20 23:46:55,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 241 treesize of output 114 [2021-11-20 23:46:55,633 INFO L354 Elim1Store]: treesize reduction 83, result has 13.5 percent of original size [2021-11-20 23:46:55,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 165 [2021-11-20 23:46:55,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:55,697 INFO L354 Elim1Store]: treesize reduction 154, result has 13.0 percent of original size [2021-11-20 23:46:55,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 162 treesize of output 127 [2021-11-20 23:46:56,532 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:46:56,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 49 [2021-11-20 23:46:56,539 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:46:56,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-11-20 23:46:56,685 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-11-20 23:46:56,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 25 [2021-11-20 23:46:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:56,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:47:03,096 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_21 (_ BitVec 32)) (|v_ULTIMATE.start_main_~t~0#1.base_40| (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32))) (let ((.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|))) (let ((.cse0 (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse2 v_DerPreprocessor_23)))) (store .cse5 |v_ULTIMATE.start_main_~t~0#1.base_40| (store (select .cse5 |v_ULTIMATE.start_main_~t~0#1.base_40|) (_ bv0 32) (_ bv3 32)))))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_40|)))) (= (_ bv2 32) (let ((.cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))) (select (select .cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) .cse2 |v_ULTIMATE.start_main_~t~0#1.base_40|)))) (store .cse1 |v_ULTIMATE.start_main_~t~0#1.base_40| (store (select .cse1 |v_ULTIMATE.start_main_~t~0#1.base_40|) (_ bv0 32) v_DerPreprocessor_21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3)) (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base|) .cse2 (_ bv0 32))))) (store .cse4 |v_ULTIMATE.start_main_~t~0#1.base_40| (store (select .cse4 |v_ULTIMATE.start_main_~t~0#1.base_40|) (_ bv0 32) v_DerPreprocessor_22))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3)))) (not (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32))))))) is different from false [2021-11-20 23:47:03,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:47:03,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2044 treesize of output 1965 [2021-11-20 23:47:21,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8733 treesize of output 8613 [2021-11-20 23:47:21,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9533 treesize of output 9497 [2021-11-20 23:47:21,948 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 23:47:21,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296712970] [2021-11-20 23:47:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:47:21,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:47:21,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:47:21,949 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:47:21,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 23:47:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:47:22,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 23:47:22,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:47:22,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:47:22,123 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 23:47:22,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-11-20 23:47:22,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:47:22,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 23:47:22,399 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-20 23:47:22,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 26 [2021-11-20 23:47:22,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:47:22,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-20 23:47:22,599 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-20 23:47:22,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 47 [2021-11-20 23:47:23,015 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-11-20 23:47:23,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 127 [2021-11-20 23:47:23,055 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-20 23:47:23,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 144 [2021-11-20 23:47:23,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 83 [2021-11-20 23:47:23,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:47:23,602 INFO L354 Elim1Store]: treesize reduction 70, result has 19.5 percent of original size [2021-11-20 23:47:23,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 84 [2021-11-20 23:47:23,634 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-20 23:47:23,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 122 [2021-11-20 23:47:23,662 INFO L354 Elim1Store]: treesize reduction 65, result has 12.2 percent of original size [2021-11-20 23:47:23,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 77 [2021-11-20 23:47:24,427 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 23:47:24,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 47 [2021-11-20 23:47:24,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-11-20 23:47:24,680 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:47:24,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-20 23:47:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:47:24,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:47:26,759 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~p~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (= (let ((.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| (_ bv3 32))) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| v_DerPreprocessor_26)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| v_DerPreprocessor_27)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (_ bv2 32))) is different from false [2021-11-20 23:48:07,164 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~t~0#1.base_41| (_ BitVec 32))) (or (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_118| (_ BitVec 32)) (|ULTIMATE.start_main_~t~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (= (_ bv2 32) (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|)) (.cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse1 v_DerPreprocessor_28)))) (store .cse0 |v_ULTIMATE.start_main_~t~0#1.base_41| (store (select .cse0 |v_ULTIMATE.start_main_~t~0#1.base_41|) |v_ULTIMATE.start_main_~p~0#1.offset_118| (_ bv3 32)))) (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) .cse1 |v_ULTIMATE.start_main_~t~0#1.base_41|)))) (store .cse2 |v_ULTIMATE.start_main_~t~0#1.base_41| (store (select .cse2 |v_ULTIMATE.start_main_~t~0#1.base_41|) |v_ULTIMATE.start_main_~p~0#1.offset_118| v_DerPreprocessor_26))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3)) (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base|) .cse1 |ULTIMATE.start_main_~t~0#1.offset|)))) (store .cse4 |v_ULTIMATE.start_main_~t~0#1.base_41| (store (select .cse4 |v_ULTIMATE.start_main_~t~0#1.base_41|) |v_ULTIMATE.start_main_~p~0#1.offset_118| v_DerPreprocessor_27))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_41|))))) is different from false [2021-11-20 23:48:07,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2034 treesize of output 1878 [2021-11-20 23:48:11,552 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~t~0#1.base_41| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_41|))) (and (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_118| (_ BitVec 32)) (|ULTIMATE.start_main_~t~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_30 (_ BitVec 32)) (v_DerPreprocessor_29 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|)) (.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| v_DerPreprocessor_29) .cse1 |v_ULTIMATE.start_main_~t~0#1.base_41|)))) (store .cse0 |v_ULTIMATE.start_main_~t~0#1.base_41| (store (select .cse0 |v_ULTIMATE.start_main_~t~0#1.base_41|) |v_ULTIMATE.start_main_~p~0#1.offset_118| v_DerPreprocessor_26))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2) |c_ULTIMATE.start_main_~p~0#1.base|)) (not (= .cse1 (select (select (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| v_DerPreprocessor_30) .cse1 |ULTIMATE.start_main_~t~0#1.offset|)))) (store .cse3 |v_ULTIMATE.start_main_~t~0#1.base_41| (store (select .cse3 |v_ULTIMATE.start_main_~t~0#1.base_41|) |v_ULTIMATE.start_main_~p~0#1.offset_118| v_DerPreprocessor_27))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2)))))) (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_118| (_ BitVec 32)) (v_DerPreprocessor_29 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| v_DerPreprocessor_29) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) |v_ULTIMATE.start_main_~t~0#1.base_41|)))) (store .cse4 |v_ULTIMATE.start_main_~t~0#1.base_41| (store (select .cse4 |v_ULTIMATE.start_main_~t~0#1.base_41|) |v_ULTIMATE.start_main_~p~0#1.offset_118| v_DerPreprocessor_26))) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) |c_ULTIMATE.start_main_~p~0#1.base|)) (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_118| (_ BitVec 32)) (|ULTIMATE.start_main_~t~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_30 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (= |c_ULTIMATE.start_main_~p~0#1.offset| (select (select (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| v_DerPreprocessor_30) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) |ULTIMATE.start_main_~t~0#1.offset|)))) (store .cse5 |v_ULTIMATE.start_main_~t~0#1.base_41| (store (select .cse5 |v_ULTIMATE.start_main_~t~0#1.base_41|) |v_ULTIMATE.start_main_~p~0#1.offset_118| v_DerPreprocessor_27))) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_118| (_ BitVec 32)) (|ULTIMATE.start_main_~t~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_30 (_ BitVec 32)) (v_DerPreprocessor_29 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (let ((.cse7 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|)) (.cse8 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (not (= (select (select (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| v_DerPreprocessor_29) .cse7 |v_ULTIMATE.start_main_~t~0#1.base_41|)))) (store .cse6 |v_ULTIMATE.start_main_~t~0#1.base_41| (store (select .cse6 |v_ULTIMATE.start_main_~t~0#1.base_41|) |v_ULTIMATE.start_main_~p~0#1.offset_118| v_DerPreprocessor_26))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8) |v_ULTIMATE.start_main_~t~0#1.base_41|)) (not (= |v_ULTIMATE.start_main_~p~0#1.offset_118| (select (select (let ((.cse9 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| v_DerPreprocessor_30) .cse7 |ULTIMATE.start_main_~t~0#1.offset|)))) (store .cse9 |v_ULTIMATE.start_main_~t~0#1.base_41| (store (select .cse9 |v_ULTIMATE.start_main_~t~0#1.base_41|) |v_ULTIMATE.start_main_~p~0#1.offset_118| v_DerPreprocessor_27))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))))))))) is different from false [2021-11-20 23:48:12,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3853 treesize of output 3805 [2021-11-20 23:48:12,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9104 treesize of output 9020 [2021-11-20 23:48:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-20 23:48:32,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296712970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:48:32,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:48:32,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-11-20 23:48:32,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209726452] [2021-11-20 23:48:32,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:48:32,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 23:48:32,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:48:32,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 23:48:32,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1942, Unknown=36, NotChecked=380, Total=2652 [2021-11-20 23:48:32,607 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:49:10,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:49:10,999 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2021-11-20 23:49:10,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:49:10,999 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-20 23:49:11,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:49:11,000 INFO L225 Difference]: With dead ends: 54 [2021-11-20 23:49:11,000 INFO L226 Difference]: Without dead ends: 52 [2021-11-20 23:49:11,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 81 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 183.3s TimeCoverageRelationStatistics Valid=312, Invalid=2014, Unknown=42, NotChecked=388, Total=2756 [2021-11-20 23:49:11,002 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:49:11,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 133 Unchecked, 0.2s Time] [2021-11-20 23:49:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-20 23:49:11,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-11-20 23:49:11,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:49:11,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-11-20 23:49:11,009 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 26 [2021-11-20 23:49:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:49:11,010 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-11-20 23:49:11,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:49:11,010 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-11-20 23:49:11,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 23:49:11,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:49:11,011 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:49:11,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-20 23:49:11,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-20 23:49:11,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 23:49:11,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:49:11,618 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:49:11,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:49:11,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1027036926, now seen corresponding path program 2 times [2021-11-20 23:49:11,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:49:11,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024254548] [2021-11-20 23:49:11,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 23:49:11,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:49:11,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:49:11,621 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:49:11,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b91816f-f3dc-420b-9784-084230bda410/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 23:49:11,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 23:49:11,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:49:11,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 23:49:11,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:49:11,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:49:11,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:49:11,956 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 23:49:11,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-11-20 23:49:12,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:49:12,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 23:49:12,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-20 23:49:12,301 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-20 23:49:12,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 34 [2021-11-20 23:49:12,461 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-20 23:49:12,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 29 [2021-11-20 23:49:12,620 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-20 23:49:12,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-11-20 23:49:12,945 INFO L354 Elim1Store]: treesize reduction 130, result has 14.5 percent of original size [2021-11-20 23:49:12,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 43 [2021-11-20 23:49:13,341 INFO L354 Elim1Store]: treesize reduction 80, result has 34.4 percent of original size [2021-11-20 23:49:13,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 70 [2021-11-20 23:49:16,658 INFO L354 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2021-11-20 23:49:16,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 64 [2021-11-20 23:49:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:49:16,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:49:18,899 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~p~0#1.base| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| (_ bv3 32))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv3 32)) (= .cse0 (_ bv1 32))))) is different from false [2021-11-20 23:49:20,944 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_122| (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_31)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_122| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_122|) |c_ULTIMATE.start_main_~t~0#1.offset| (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv1 32)) (= (_ bv3 32) .cse0)))) is different from false [2021-11-20 23:49:22,993 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_122| (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_31)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_122| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_122|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv1 32)) (= (_ bv3 32) .cse0)))) is different from false [2021-11-20 23:49:25,020 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~p~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_122| (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| (_ bv1 32)) (bvadd (_ bv4 32) |ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_31)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_122| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_122|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv1 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-11-20 23:49:27,076 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_129| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_122| (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_32 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_32)))) (store .cse2 |c_ULTIMATE.start_main_~t~0#1.base| (store (store (select .cse2 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_129| (_ bv1 32)) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_129|) v_DerPreprocessor_31))))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_122| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_122|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv1 32)) (= (_ bv3 32) .cse0)))) is different from false [2021-11-20 23:49:29,167 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~t~0#1.base_46| (_ BitVec 32))) (or (not (= (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_46|)))))) (_ bv0 1))) (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_129| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_122| (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_32 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_32)))) (store .cse2 |v_ULTIMATE.start_main_~t~0#1.base_46| (store (store (select .cse2 |v_ULTIMATE.start_main_~t~0#1.base_46|) |v_ULTIMATE.start_main_~p~0#1.offset_129| (_ bv1 32)) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_129|) v_DerPreprocessor_31))))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_122| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_122|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= (_ bv1 32) .cse0) (= (_ bv3 32) .cse0)))))) is different from false [2021-11-20 23:49:31,245 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~t~0#1.base_46| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_129| (_ BitVec 32)) (|ULTIMATE.start_main_~p~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_122| (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_32 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset| (_ bv2 32)) (bvadd (_ bv4 32) |ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_32)))) (store .cse2 |v_ULTIMATE.start_main_~t~0#1.base_46| (store (store (select .cse2 |v_ULTIMATE.start_main_~t~0#1.base_46|) |v_ULTIMATE.start_main_~p~0#1.offset_129| (_ bv1 32)) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_129|) v_DerPreprocessor_31))))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_122| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_122|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_46|))))))))))) (= (_ bv3 32) .cse0) (= (_ bv1 32) .cse0)))) is different from false [2021-11-20 23:49:33,442 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~t~0#1.base_46| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_129| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_122| (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_32 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_131| (_ BitVec 32)) (v_DerPreprocessor_33 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_33)))) (store .cse3 |c_ULTIMATE.start_main_~t~0#1.base| (store (store (select .cse3 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_131| (_ bv2 32)) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_131|) v_DerPreprocessor_32))))) (store .cse2 |v_ULTIMATE.start_main_~t~0#1.base_46| (store (store (select .cse2 |v_ULTIMATE.start_main_~t~0#1.base_46|) |v_ULTIMATE.start_main_~p~0#1.offset_129| (_ bv1 32)) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_129|) v_DerPreprocessor_31))))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_122| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_122|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 (_ bv1 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_46|))))))))))) (= (_ bv3 32) .cse0)))) is different from false [2021-11-20 23:49:35,797 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~t~0#1.base_46| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_129| (_ BitVec 32)) (|v_ULTIMATE.start_main_~t~0#1.base_47| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_122| (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_32 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_131| (_ BitVec 32)) (v_DerPreprocessor_33 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|) v_DerPreprocessor_33)))) (store .cse3 |v_ULTIMATE.start_main_~t~0#1.base_47| (store (store (select .cse3 |v_ULTIMATE.start_main_~t~0#1.base_47|) |v_ULTIMATE.start_main_~p~0#1.offset_131| (_ bv2 32)) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_131|) v_DerPreprocessor_32))))) (store .cse2 |v_ULTIMATE.start_main_~t~0#1.base_46| (store (store (select .cse2 |v_ULTIMATE.start_main_~t~0#1.base_46|) |v_ULTIMATE.start_main_~p~0#1.offset_129| (_ bv1 32)) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_129|) v_DerPreprocessor_31))))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_122| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_122|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= (_ bv3 32) .cse0) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_47| (_ bv1 1)) |v_ULTIMATE.start_main_~t~0#1.base_46|)))))))))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_47|))) (= .cse0 (_ bv1 32))))) is different from false [2021-11-20 23:49:35,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54429363 treesize of output 54298291