./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/splice-2.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_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/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_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/splice-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/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_ce03091a-27f5-4ff8-87ab-e3dcb8672858/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 098fc4cb5d15cb305e8d98bf2e1c69b111d102681b51dec68ae720515d6f30bc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:18:00,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:18:00,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:18:00,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:18:00,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:18:00,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:18:00,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:18:00,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:18:00,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:18:01,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:18:01,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:18:01,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:18:01,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:18:01,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:18:01,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:18:01,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:18:01,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:18:01,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:18:01,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:18:01,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:18:01,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:18:01,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:18:01,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:18:01,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:18:01,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:18:01,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:18:01,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:18:01,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:18:01,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:18:01,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:18:01,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:18:01,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:18:01,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:18:01,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:18:01,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:18:01,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:18:01,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:18:01,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:18:01,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:18:01,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:18:01,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:18:01,066 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:18:01,115 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:18:01,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:18:01,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:18:01,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:18:01,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:18:01,118 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:18:01,118 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:18:01,118 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:18:01,119 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:18:01,119 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:18:01,120 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:18:01,120 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:18:01,121 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:18:01,121 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:18:01,121 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:18:01,122 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:18:01,122 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:18:01,122 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:18:01,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:18:01,123 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:18:01,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:18:01,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:18:01,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:18:01,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:18:01,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:18:01,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:18:01,126 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:18:01,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:18:01,127 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:18:01,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:18:01,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:18:01,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:18:01,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:18:01,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:18:01,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:18:01,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:18:01,129 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:18:01,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:18:01,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:18:01,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:18:01,130 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:18:01,131 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_ce03091a-27f5-4ff8-87ab-e3dcb8672858/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 098fc4cb5d15cb305e8d98bf2e1c69b111d102681b51dec68ae720515d6f30bc [2021-11-21 01:18:01,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:18:01,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:18:01,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:18:01,499 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:18:01,500 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:18:01,502 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-properties/splice-2.i [2021-11-21 01:18:01,579 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/data/0edacb160/4e4078121e394080b45ce938bcb9e956/FLAG1012e1d52 [2021-11-21 01:18:02,134 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:18:02,135 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/sv-benchmarks/c/list-properties/splice-2.i [2021-11-21 01:18:02,154 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/data/0edacb160/4e4078121e394080b45ce938bcb9e956/FLAG1012e1d52 [2021-11-21 01:18:02,430 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/data/0edacb160/4e4078121e394080b45ce938bcb9e956 [2021-11-21 01:18:02,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:18:02,434 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:18:02,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:18:02,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:18:02,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:18:02,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:18:02" (1/1) ... [2021-11-21 01:18:02,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@213b6859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:02, skipping insertion in model container [2021-11-21 01:18:02,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:18:02" (1/1) ... [2021-11-21 01:18:02,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:18:02,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:18:02,945 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_ce03091a-27f5-4ff8-87ab-e3dcb8672858/sv-benchmarks/c/list-properties/splice-2.i[23721,23734] [2021-11-21 01:18:02,949 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:18:02,974 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:18:03,039 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_ce03091a-27f5-4ff8-87ab-e3dcb8672858/sv-benchmarks/c/list-properties/splice-2.i[23721,23734] [2021-11-21 01:18:03,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:18:03,080 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:18:03,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:03 WrapperNode [2021-11-21 01:18:03,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:18:03,082 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:18:03,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:18:03,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:18:03,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:03" (1/1) ... [2021-11-21 01:18:03,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:03" (1/1) ... [2021-11-21 01:18:03,180 INFO L137 Inliner]: procedures = 124, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 104 [2021-11-21 01:18:03,181 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:18:03,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:18:03,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:18:03,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:18:03,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:03" (1/1) ... [2021-11-21 01:18:03,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:03" (1/1) ... [2021-11-21 01:18:03,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:03" (1/1) ... [2021-11-21 01:18:03,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:03" (1/1) ... [2021-11-21 01:18:03,228 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:03" (1/1) ... [2021-11-21 01:18:03,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:03" (1/1) ... [2021-11-21 01:18:03,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:03" (1/1) ... [2021-11-21 01:18:03,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:18:03,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:18:03,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:18:03,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:18:03,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:03" (1/1) ... [2021-11-21 01:18:03,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:18:03,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:18:03,302 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:18:03,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:18:03,367 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-21 01:18:03,368 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-21 01:18:03,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:18:03,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:18:03,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:18:03,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:18:03,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:18:03,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:18:03,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:18:03,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:18:03,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:18:03,537 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:18:03,539 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:18:03,586 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-21 01:18:03,791 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:18:03,845 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:18:03,846 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-21 01:18:03,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:18:03 BoogieIcfgContainer [2021-11-21 01:18:03,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:18:03,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:18:03,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:18:03,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:18:03,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:18:02" (1/3) ... [2021-11-21 01:18:03,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252b4ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:18:03, skipping insertion in model container [2021-11-21 01:18:03,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:03" (2/3) ... [2021-11-21 01:18:03,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252b4ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:18:03, skipping insertion in model container [2021-11-21 01:18:03,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:18:03" (3/3) ... [2021-11-21 01:18:03,857 INFO L111 eAbstractionObserver]: Analyzing ICFG splice-2.i [2021-11-21 01:18:03,862 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:18:03,863 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:18:03,921 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:18:03,934 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 [2021-11-21 01:18:03,934 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:18:03,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 20 states have (on average 1.6) internal successors, (32), 22 states have internal predecessors, (32), 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) [2021-11-21 01:18:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:18:03,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:03,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:03,980 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:03,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:03,987 INFO L85 PathProgramCache]: Analyzing trace with hash 285317644, now seen corresponding path program 1 times [2021-11-21 01:18:03,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:18:03,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51752102] [2021-11-21 01:18:03,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:04,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:18:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:18:04,199 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:18:04,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51752102] [2021-11-21 01:18:04,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51752102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:18:04,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:18:04,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:18:04,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583885067] [2021-11-21 01:18:04,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:18:04,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:18:04,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:18:04,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:18:04,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:18:04,288 INFO L87 Difference]: Start difference. First operand has 24 states, 20 states have (on average 1.6) internal successors, (32), 22 states have internal predecessors, (32), 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 5.5) internal successors, (11), 2 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) [2021-11-21 01:18:04,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:04,350 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2021-11-21 01:18:04,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:18:04,353 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 [2021-11-21 01:18:04,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:18:04,361 INFO L225 Difference]: With dead ends: 37 [2021-11-21 01:18:04,361 INFO L226 Difference]: Without dead ends: 18 [2021-11-21 01:18:04,365 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 [2021-11-21 01:18:04,370 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:18:04,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:18:04,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-21 01:18:04,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-21 01:18:04,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:18:04,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-21 01:18:04,412 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2021-11-21 01:18:04,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:18:04,413 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-21 01:18:04,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-11-21 01:18:04,414 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-21 01:18:04,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:18:04,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:04,416 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:04,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:18:04,417 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:04,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash -726011293, now seen corresponding path program 1 times [2021-11-21 01:18:04,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:18:04,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000623240] [2021-11-21 01:18:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:04,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:18:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:18:04,584 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:18:04,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000623240] [2021-11-21 01:18:04,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000623240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:18:04,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:18:04,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:18:04,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007212743] [2021-11-21 01:18:04,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:18:04,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:18:04,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:18:04,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:18:04,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:18:04,593 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:18:04,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:04,680 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-11-21 01:18:04,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:18:04,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:18:04,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:18:04,685 INFO L225 Difference]: With dead ends: 36 [2021-11-21 01:18:04,686 INFO L226 Difference]: Without dead ends: 25 [2021-11-21 01:18:04,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:18:04,697 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:18:04,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:18:04,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-21 01:18:04,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-11-21 01:18:04,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:18:04,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-21 01:18:04,704 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2021-11-21 01:18:04,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:18:04,705 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-21 01:18:04,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:18:04,705 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-21 01:18:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:18:04,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:04,706 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:04,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:18:04,707 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:04,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:04,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1036697103, now seen corresponding path program 1 times [2021-11-21 01:18:04,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:18:04,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754965595] [2021-11-21 01:18:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:04,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:18:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:18:04,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:18:04,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754965595] [2021-11-21 01:18:04,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754965595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:18:04,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:18:04,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:18:04,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938881285] [2021-11-21 01:18:04,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:18:04,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:18:04,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:18:04,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:18:04,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:18:04,793 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:18:04,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:04,892 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-11-21 01:18:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:18:04,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-21 01:18:04,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:18:04,895 INFO L225 Difference]: With dead ends: 29 [2021-11-21 01:18:04,895 INFO L226 Difference]: Without dead ends: 22 [2021-11-21 01:18:04,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:18:04,906 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:18:04,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 46 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:18:04,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-21 01:18:04,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-21 01:18:04,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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) [2021-11-21 01:18:04,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-21 01:18:04,921 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 17 [2021-11-21 01:18:04,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:18:04,922 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-21 01:18:04,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:18:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-21 01:18:04,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:18:04,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:04,925 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:04,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:18:04,926 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:04,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:04,927 INFO L85 PathProgramCache]: Analyzing trace with hash 349950098, now seen corresponding path program 1 times [2021-11-21 01:18:04,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:18:04,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164038379] [2021-11-21 01:18:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:04,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:18:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:18:05,307 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:18:05,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164038379] [2021-11-21 01:18:05,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164038379] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:18:05,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468462835] [2021-11-21 01:18:05,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:05,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:18:05,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:18:05,314 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:18:05,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:18:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:05,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-21 01:18:05,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:18:05,525 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 [2021-11-21 01:18:05,657 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 [2021-11-21 01:18:05,666 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 [2021-11-21 01:18:05,698 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:18:05,704 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 [2021-11-21 01:18:05,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:05,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-21 01:18:05,871 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:18:05,873 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 [2021-11-21 01:18:06,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:06,142 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-21 01:18:06,143 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 38 treesize of output 25 [2021-11-21 01:18:06,338 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:18:06,338 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 [2021-11-21 01:18:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:18:06,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:18:06,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:18:06,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 154 treesize of output 154 [2021-11-21 01:18:06,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:18:06,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 146 treesize of output 146 [2021-11-21 01:18:06,492 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-21 01:18:06,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1975903651] [2021-11-21 01:18:06,512 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 01:18:06,513 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:18:06,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:18:06,522 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:18:06,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:18:06,590 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@32236856 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) [2021-11-21 01:18:06,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:18:06,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-21 01:18:06,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523681826] [2021-11-21 01:18:06,595 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 01:18:06,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:18:06,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:18:06,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:18:06,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:18:06,600 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-11-21 01:18:06,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:18:06,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:18:06,603 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 [2021-11-21 01:18:06,604 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] [2021-11-21 01:18:06,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 01:18:06,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:18:06,831 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@32236856 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) [2021-11-21 01:18:06,833 INFO L158 Benchmark]: Toolchain (without parser) took 4398.53ms. Allocated memory was 79.7MB in the beginning and 100.7MB in the end (delta: 21.0MB). Free memory was 41.3MB in the beginning and 41.7MB in the end (delta: -340.6kB). Peak memory consumption was 21.3MB. Max. memory is 16.1GB. [2021-11-21 01:18:06,833 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 79.7MB. Free memory is still 58.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:18:06,834 INFO L158 Benchmark]: CACSL2BoogieTranslator took 643.84ms. Allocated memory was 79.7MB in the beginning and 100.7MB in the end (delta: 21.0MB). Free memory was 41.1MB in the beginning and 69.8MB in the end (delta: -28.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 01:18:06,834 INFO L158 Benchmark]: Boogie Procedure Inliner took 98.81ms. Allocated memory is still 100.7MB. Free memory was 69.4MB in the beginning and 67.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:18:06,834 INFO L158 Benchmark]: Boogie Preprocessor took 78.02ms. Allocated memory is still 100.7MB. Free memory was 67.7MB in the beginning and 66.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:18:06,835 INFO L158 Benchmark]: RCFGBuilder took 586.64ms. Allocated memory is still 100.7MB. Free memory was 66.0MB in the beginning and 51.7MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-21 01:18:06,835 INFO L158 Benchmark]: TraceAbstraction took 2982.58ms. Allocated memory is still 100.7MB. Free memory was 51.3MB in the beginning and 41.7MB in the end (delta: 9.6MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. [2021-11-21 01:18:06,837 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 79.7MB. Free memory is still 58.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 643.84ms. Allocated memory was 79.7MB in the beginning and 100.7MB in the end (delta: 21.0MB). Free memory was 41.1MB in the beginning and 69.8MB in the end (delta: -28.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 98.81ms. Allocated memory is still 100.7MB. Free memory was 69.4MB in the beginning and 67.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 78.02ms. Allocated memory is still 100.7MB. Free memory was 67.7MB in the beginning and 66.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 586.64ms. Allocated memory is still 100.7MB. Free memory was 66.0MB in the beginning and 51.7MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 2982.58ms. Allocated memory is still 100.7MB. Free memory was 51.3MB in the beginning and 41.7MB in the end (delta: 9.6MB). Peak memory consumption was 12.8MB. 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@32236856 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@32236856: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-21 01:18:06,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally 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_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/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_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/splice-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/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_ce03091a-27f5-4ff8-87ab-e3dcb8672858/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 098fc4cb5d15cb305e8d98bf2e1c69b111d102681b51dec68ae720515d6f30bc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:18:09,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:18:09,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:18:09,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:18:09,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:18:09,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:18:09,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:18:09,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:18:09,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:18:09,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:18:09,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:18:09,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:18:09,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:18:09,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:18:09,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:18:09,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:18:09,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:18:09,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:18:09,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:18:09,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:18:09,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:18:09,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:18:09,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:18:09,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:18:09,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:18:09,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:18:09,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:18:09,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:18:09,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:18:09,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:18:09,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:18:09,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:18:09,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:18:09,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:18:09,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:18:09,657 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:18:09,658 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:18:09,658 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:18:09,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:18:09,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:18:09,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:18:09,662 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 01:18:09,692 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:18:09,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:18:09,693 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:18:09,693 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:18:09,694 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:18:09,694 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:18:09,695 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:18:09,695 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:18:09,695 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:18:09,695 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:18:09,696 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:18:09,696 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:18:09,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:18:09,697 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:18:09,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:18:09,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:18:09,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:18:09,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:18:09,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:18:09,698 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 01:18:09,699 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 01:18:09,699 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:18:09,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:18:09,700 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:18:09,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:18:09,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:18:09,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 01:18:09,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:18:09,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:18:09,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:18:09,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:18:09,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:18:09,702 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 01:18:09,702 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 01:18:09,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:18:09,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:18:09,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:18:09,703 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_ce03091a-27f5-4ff8-87ab-e3dcb8672858/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 098fc4cb5d15cb305e8d98bf2e1c69b111d102681b51dec68ae720515d6f30bc [2021-11-21 01:18:10,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:18:10,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:18:10,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:18:10,228 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:18:10,229 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:18:10,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-properties/splice-2.i [2021-11-21 01:18:10,320 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/data/194a5fbe6/4de96dffa39a4741b780b11c707f5e23/FLAGada046802 [2021-11-21 01:18:10,925 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:18:10,926 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/sv-benchmarks/c/list-properties/splice-2.i [2021-11-21 01:18:10,939 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/data/194a5fbe6/4de96dffa39a4741b780b11c707f5e23/FLAGada046802 [2021-11-21 01:18:11,221 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/data/194a5fbe6/4de96dffa39a4741b780b11c707f5e23 [2021-11-21 01:18:11,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:18:11,227 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:18:11,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:18:11,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:18:11,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:18:11,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:18:11" (1/1) ... [2021-11-21 01:18:11,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c405476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:11, skipping insertion in model container [2021-11-21 01:18:11,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:18:11" (1/1) ... [2021-11-21 01:18:11,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:18:11,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:18:11,722 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_ce03091a-27f5-4ff8-87ab-e3dcb8672858/sv-benchmarks/c/list-properties/splice-2.i[23721,23734] [2021-11-21 01:18:11,725 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:18:11,745 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:18:11,823 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_ce03091a-27f5-4ff8-87ab-e3dcb8672858/sv-benchmarks/c/list-properties/splice-2.i[23721,23734] [2021-11-21 01:18:11,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:18:11,866 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:18:11,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:11 WrapperNode [2021-11-21 01:18:11,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:18:11,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:18:11,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:18:11,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:18:11,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:11" (1/1) ... [2021-11-21 01:18:11,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:11" (1/1) ... [2021-11-21 01:18:11,928 INFO L137 Inliner]: procedures = 127, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 104 [2021-11-21 01:18:11,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:18:11,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:18:11,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:18:11,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:18:11,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:11" (1/1) ... [2021-11-21 01:18:11,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:11" (1/1) ... [2021-11-21 01:18:11,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:11" (1/1) ... [2021-11-21 01:18:11,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:11" (1/1) ... [2021-11-21 01:18:11,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:11" (1/1) ... [2021-11-21 01:18:11,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:11" (1/1) ... [2021-11-21 01:18:11,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:11" (1/1) ... [2021-11-21 01:18:11,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:18:11,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:18:11,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:18:11,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:18:11,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:11" (1/1) ... [2021-11-21 01:18:12,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:18:12,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:18:12,028 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:18:12,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:18:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-21 01:18:12,073 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-21 01:18:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 01:18:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:18:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:18:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:18:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:18:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 01:18:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 01:18:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:18:12,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:18:12,186 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:18:12,188 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:18:12,265 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-21 01:18:12,541 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:18:12,547 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:18:12,547 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-21 01:18:12,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:18:12 BoogieIcfgContainer [2021-11-21 01:18:12,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:18:12,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:18:12,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:18:12,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:18:12,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:18:11" (1/3) ... [2021-11-21 01:18:12,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50543a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:18:12, skipping insertion in model container [2021-11-21 01:18:12,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:18:11" (2/3) ... [2021-11-21 01:18:12,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50543a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:18:12, skipping insertion in model container [2021-11-21 01:18:12,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:18:12" (3/3) ... [2021-11-21 01:18:12,569 INFO L111 eAbstractionObserver]: Analyzing ICFG splice-2.i [2021-11-21 01:18:12,575 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:18:12,575 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:18:12,641 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:18:12,651 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 [2021-11-21 01:18:12,651 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:18:12,671 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 28 states have internal predecessors, (42), 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) [2021-11-21 01:18:12,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:18:12,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:12,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:12,678 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:12,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:12,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1688859855, now seen corresponding path program 1 times [2021-11-21 01:18:12,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:18:12,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127173408] [2021-11-21 01:18:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:12,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:18:12,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:18:12,701 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:18:12,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:18:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:12,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 01:18:12,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:18:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:18:12,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:18:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:18:12,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:18:12,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127173408] [2021-11-21 01:18:12,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127173408] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:18:12,974 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:18:12,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:18:12,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364737433] [2021-11-21 01:18:12,978 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:18:12,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:18:12,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:18:13,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:18:13,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:18:13,027 INFO L87 Difference]: Start difference. First operand has 30 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 28 states have internal predecessors, (42), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:18:13,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:13,051 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-11-21 01:18:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:18:13,053 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-21 01:18:13,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:18:13,058 INFO L225 Difference]: With dead ends: 47 [2021-11-21 01:18:13,059 INFO L226 Difference]: Without dead ends: 22 [2021-11-21 01:18:13,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:18:13,065 INFO L933 BasicCegarLoop]: 39 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, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:18:13,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:18:13,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-21 01:18:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-21 01:18:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:18:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-21 01:18:13,106 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2021-11-21 01:18:13,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:18:13,106 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-21 01:18:13,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:18:13,107 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-21 01:18:13,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:18:13,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:13,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:13,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:18:13,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:18:13,318 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:13,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:13,319 INFO L85 PathProgramCache]: Analyzing trace with hash 431515036, now seen corresponding path program 1 times [2021-11-21 01:18:13,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:18:13,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503158391] [2021-11-21 01:18:13,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:13,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:18:13,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:18:13,327 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:18:13,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:18:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:13,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:18:13,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:18:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:18:13,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:18:13,657 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 [2021-11-21 01:18:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:18:13,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:18:13,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503158391] [2021-11-21 01:18:13,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503158391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:18:13,692 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:18:13,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-21 01:18:13,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169560955] [2021-11-21 01:18:13,693 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:18:13,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:18:13,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:18:13,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:18:13,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:18:13,696 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:18:13,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:13,856 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2021-11-21 01:18:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:18:13,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:18:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:18:13,858 INFO L225 Difference]: With dead ends: 43 [2021-11-21 01:18:13,858 INFO L226 Difference]: Without dead ends: 30 [2021-11-21 01:18:13,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:18:13,860 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:18:13,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:18:13,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-21 01:18:13,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2021-11-21 01:18:13,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 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) [2021-11-21 01:18:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-11-21 01:18:13,866 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2021-11-21 01:18:13,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:18:13,867 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-11-21 01:18:13,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:18:13,867 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-11-21 01:18:13,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:18:13,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:13,868 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:13,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:18:14,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:18:14,083 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:14,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:14,083 INFO L85 PathProgramCache]: Analyzing trace with hash 172969064, now seen corresponding path program 1 times [2021-11-21 01:18:14,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:18:14,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449243694] [2021-11-21 01:18:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:14,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:18:14,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:18:14,086 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:18:14,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:18:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:14,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:18:14,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:18:14,229 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 16 treesize of output 8 [2021-11-21 01:18:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:18:14,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:18:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:18:14,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:18:14,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449243694] [2021-11-21 01:18:14,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449243694] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:18:14,324 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:18:14,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-21 01:18:14,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072827813] [2021-11-21 01:18:14,325 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:18:14,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:18:14,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:18:14,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:18:14,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:18:14,327 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2021-11-21 01:18:14,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:14,514 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2021-11-21 01:18:14,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:18:14,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 18 [2021-11-21 01:18:14,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:18:14,517 INFO L225 Difference]: With dead ends: 34 [2021-11-21 01:18:14,517 INFO L226 Difference]: Without dead ends: 26 [2021-11-21 01:18:14,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:18:14,519 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:18:14,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 63 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:18:14,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-21 01:18:14,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-21 01:18:14,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:18:14,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-21 01:18:14,526 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 18 [2021-11-21 01:18:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:18:14,527 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-21 01:18:14,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2021-11-21 01:18:14,527 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-21 01:18:14,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:18:14,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:14,528 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:14,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:18:14,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:18:14,734 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:14,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:14,734 INFO L85 PathProgramCache]: Analyzing trace with hash -181626980, now seen corresponding path program 1 times [2021-11-21 01:18:14,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:18:14,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035237144] [2021-11-21 01:18:14,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:14,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:18:14,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:18:14,737 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:18:14,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 01:18:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:14,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 01:18:14,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:18:14,951 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 [2021-11-21 01:18:15,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:15,108 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 [2021-11-21 01:18:15,204 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 01:18:15,205 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 [2021-11-21 01:18:15,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:15,476 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:18:15,477 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 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 01:18:15,632 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:18:15,633 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 [2021-11-21 01:18:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:18:15,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:18:17,898 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 [2021-11-21 01:18:20,013 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_35| (_ BitVec 32)) (v_DerPreprocessor_2 (_ 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_2)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_35| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_35|) |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 [2021-11-21 01:18:22,118 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_35| (_ BitVec 32)) (v_DerPreprocessor_2 (_ 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_2)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_35| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_35|) (_ 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 [2021-11-21 01:18:22,140 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 465 treesize of output 449 [2021-11-21 01:18:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-21 01:18:23,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:18:23,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035237144] [2021-11-21 01:18:23,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035237144] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:18:23,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [409495483] [2021-11-21 01:18:23,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:23,517 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:18:23,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:18:23,525 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:18:23,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-21 01:18:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:23,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 01:18:23,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:18:23,728 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 [2021-11-21 01:18:23,940 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 [2021-11-21 01:18:24,085 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:18:24,086 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 [2021-11-21 01:18:24,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:24,229 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 [2021-11-21 01:18:24,360 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 01:18:24,360 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 [2021-11-21 01:18:24,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:18:24,579 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:18:24,580 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 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 01:18:24,687 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:18:24,688 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 [2021-11-21 01:18:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:18:24,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:18:27,227 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~t~0#1.base_15| (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32))) (or (= (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_4)))) (store .cse0 |v_ULTIMATE.start_main_~t~0#1.base_15| (store (select .cse0 |v_ULTIMATE.start_main_~t~0#1.base_15|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_15|)))))))))) is different from false [2021-11-21 01:18:27,247 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 225 treesize of output 217 [2021-11-21 01:18:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:18:27,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [409495483] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:18:27,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614387344] [2021-11-21 01:18:27,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:27,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:18:27,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:18:27,812 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:18:27,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:18:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:27,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:18:27,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:18:27,903 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 [2021-11-21 01:18:28,098 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 [2021-11-21 01:18:28,238 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:18:28,238 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 [2021-11-21 01:18:28,420 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-21 01:18:28,421 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 [2021-11-21 01:18:28,539 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:18:28,539 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 [2021-11-21 01:18:28,948 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-21 01:18:28,948 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 [2021-11-21 01:18:29,156 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:18:29,156 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 [2021-11-21 01:18:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:18:29,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:19:04,781 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 119 treesize of output 115 [2021-11-21 01:19:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:19:07,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614387344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:19:07,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:19:07,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12, 12, 12, 12] total 45 [2021-11-21 01:19:07,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575709231] [2021-11-21 01:19:07,210 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:19:07,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-21 01:19:07,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:19:07,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-21 01:19:07,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1423, Unknown=19, NotChecked=324, Total=1980 [2021-11-21 01:19:07,215 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 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) [2021-11-21 01:19:09,310 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~t~0#1.base_15| (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32))) (or (= (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_4)))) (store .cse0 |v_ULTIMATE.start_main_~t~0#1.base_15| (store (select .cse0 |v_ULTIMATE.start_main_~t~0#1.base_15|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_15|)))))))))) (= (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|) (forall ((|v_ULTIMATE.start_main_~p~0#1.base_35| (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32))) (let ((.cse1 (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 |v_ULTIMATE.start_main_~p~0#1.base_35| (store (select .cse2 |v_ULTIMATE.start_main_~p~0#1.base_35|) (_ bv0 32) (_ bv3 32)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= (_ bv3 32) .cse1) (= .cse1 (_ bv1 32))))) (= |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 [2021-11-21 01:19:11,375 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|)) (forall ((|v_ULTIMATE.start_main_~p~0#1.base_35| (_ BitVec 32)) (v_DerPreprocessor_2 (_ 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_2)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_35| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_35|) |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))))) (= (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)) (= |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32))) is different from false [2021-11-21 01:19:13,401 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 [2021-11-21 01:19:13,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:19:13,717 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2021-11-21 01:19:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:19:13,718 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 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 [2021-11-21 01:19:13,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:19:13,720 INFO L225 Difference]: With dead ends: 48 [2021-11-21 01:19:13,720 INFO L226 Difference]: Without dead ends: 46 [2021-11-21 01:19:13,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 67 SyntacticMatches, 10 SemanticMatches, 47 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 53.8s TimeCoverageRelationStatistics Valid=228, Invalid=1500, Unknown=22, NotChecked=602, Total=2352 [2021-11-21 01:19:13,722 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:19:13,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 156 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 174 Unchecked, 0.3s Time] [2021-11-21 01:19:13,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-21 01:19:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-11-21 01:19:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 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) [2021-11-21 01:19:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-11-21 01:19:13,732 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 21 [2021-11-21 01:19:13,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:19:13,732 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-11-21 01:19:13,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 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) [2021-11-21 01:19:13,733 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-11-21 01:19:13,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:19:13,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:19:13,734 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:19:13,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:19:13,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-21 01:19:14,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-21 01:19:14,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:19:14,351 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:19:14,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:19:14,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1593380382, now seen corresponding path program 1 times [2021-11-21 01:19:14,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:19:14,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757296051] [2021-11-21 01:19:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:14,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:19:14,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:19:14,357 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:19:14,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-21 01:19:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:14,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:19:14,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:19:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:19:14,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:19:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:19:14,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:19:14,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757296051] [2021-11-21 01:19:14,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757296051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:19:14,558 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:19:14,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 01:19:14,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509221327] [2021-11-21 01:19:14,559 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:19:14,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:19:14,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:19:14,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:19:14,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:19:14,560 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-11-21 01:19:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:19:14,603 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2021-11-21 01:19:14,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:19:14,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-21 01:19:14,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:19:14,605 INFO L225 Difference]: With dead ends: 78 [2021-11-21 01:19:14,605 INFO L226 Difference]: Without dead ends: 58 [2021-11-21 01:19:14,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:19:14,607 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 38 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 63 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 [2021-11-21 01:19:14,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 63 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:19:14,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-21 01:19:14,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2021-11-21 01:19:14,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 47 states have internal predecessors, (59), 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) [2021-11-21 01:19:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2021-11-21 01:19:14,617 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 21 [2021-11-21 01:19:14,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:19:14,618 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2021-11-21 01:19:14,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-11-21 01:19:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2021-11-21 01:19:14,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 01:19:14,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:19:14,620 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:19:14,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:19:14,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:19:14,836 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:19:14,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:19:14,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1548455633, now seen corresponding path program 1 times [2021-11-21 01:19:14,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:19:14,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444346554] [2021-11-21 01:19:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:14,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:19:14,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:19:14,840 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:19:14,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 01:19:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:14,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:19:14,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:19:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:19:15,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:19:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:19:15,183 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:19:15,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444346554] [2021-11-21 01:19:15,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444346554] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:19:15,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1649484103] [2021-11-21 01:19:15,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:15,183 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:19:15,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:19:15,185 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:19:15,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-21 01:19:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:15,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:19:15,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:19:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:19:15,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:19:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:19:15,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1649484103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:19:15,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284137109] [2021-11-21 01:19:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:15,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:19:15,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:19:15,482 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:19:15,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:19:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:15,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:19:15,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:19:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:19:15,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:19:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:19:15,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284137109] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:19:15,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:19:15,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 6 [2021-11-21 01:19:15,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240597590] [2021-11-21 01:19:15,755 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:19:15,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:19:15,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:19:15,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:19:15,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:19:15,757 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2021-11-21 01:19:16,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:19:16,105 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2021-11-21 01:19:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:19:16,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-21 01:19:16,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:19:16,107 INFO L225 Difference]: With dead ends: 84 [2021-11-21 01:19:16,107 INFO L226 Difference]: Without dead ends: 79 [2021-11-21 01:19:16,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:19:16,109 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 92 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:19:16,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 69 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:19:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-21 01:19:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2021-11-21 01:19:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 55 states have internal predecessors, (69), 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) [2021-11-21 01:19:16,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2021-11-21 01:19:16,122 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 23 [2021-11-21 01:19:16,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:19:16,123 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2021-11-21 01:19:16,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2021-11-21 01:19:16,123 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2021-11-21 01:19:16,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 01:19:16,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:19:16,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:19:16,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:19:16,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-21 01:19:16,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:19:16,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:19:16,734 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:19:16,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:19:16,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1550165655, now seen corresponding path program 1 times [2021-11-21 01:19:16,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:19:16,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144875400] [2021-11-21 01:19:16,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:16,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:19:16,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:19:16,736 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:19:16,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-21 01:19:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:16,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:19:16,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:19:16,900 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 [2021-11-21 01:19:16,912 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 [2021-11-21 01:19:17,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-21 01:19:17,068 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 22 treesize of output 10 [2021-11-21 01:19:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:19:17,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:19:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:19:17,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:19:17,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144875400] [2021-11-21 01:19:17,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144875400] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:19:17,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1868982923] [2021-11-21 01:19:17,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:17,263 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:19:17,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:19:17,265 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:19:17,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-21 01:19:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:17,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:19:17,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:19:17,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-21 01:19:17,550 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 [2021-11-21 01:19:17,732 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 [2021-11-21 01:19:17,737 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 18 treesize of output 10 [2021-11-21 01:19:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:19:17,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:19:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:19:17,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1868982923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:19:17,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117256743] [2021-11-21 01:19:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:17,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:19:17,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:19:17,901 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:19:17,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 01:19:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:17,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:19:17,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:19:18,093 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 [2021-11-21 01:19:18,101 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 [2021-11-21 01:19:18,201 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 [2021-11-21 01:19:18,215 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 18 treesize of output 10 [2021-11-21 01:19:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:19:18,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:19:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:19:18,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117256743] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:19:18,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:19:18,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 6, 8, 6] total 11 [2021-11-21 01:19:18,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043313979] [2021-11-21 01:19:18,377 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:19:18,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:19:18,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:19:18,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:19:18,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:19:18,379 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2021-11-21 01:19:19,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:19:19,268 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2021-11-21 01:19:19,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:19:19,269 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-21 01:19:19,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:19:19,270 INFO L225 Difference]: With dead ends: 74 [2021-11-21 01:19:19,270 INFO L226 Difference]: Without dead ends: 67 [2021-11-21 01:19:19,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:19:19,271 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:19:19,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 110 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:19:19,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-21 01:19:19,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2021-11-21 01:19:19,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 59 states have internal predecessors, (74), 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) [2021-11-21 01:19:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-11-21 01:19:19,282 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 23 [2021-11-21 01:19:19,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:19:19,283 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-11-21 01:19:19,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2021-11-21 01:19:19,283 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-11-21 01:19:19,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 01:19:19,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:19:19,284 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:19:19,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:19:19,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:19:19,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-21 01:19:19,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:19:19,886 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:19:19,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:19:19,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1667174376, now seen corresponding path program 2 times [2021-11-21 01:19:19,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:19:19,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248854138] [2021-11-21 01:19:19,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:19:19,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:19:19,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:19:19,888 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:19:19,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-21 01:19:19,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:19:19,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:19:19,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:19:19,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:19:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:19:20,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:19:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:19:20,103 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:19:20,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248854138] [2021-11-21 01:19:20,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248854138] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:19:20,104 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:19:20,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-21 01:19:20,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332029167] [2021-11-21 01:19:20,104 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:19:20,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:19:20,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:19:20,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:19:20,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:19:20,106 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:19:20,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:19:20,155 INFO L93 Difference]: Finished difference Result 110 states and 138 transitions. [2021-11-21 01:19:20,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:19:20,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-21 01:19:20,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:19:20,158 INFO L225 Difference]: With dead ends: 110 [2021-11-21 01:19:20,158 INFO L226 Difference]: Without dead ends: 70 [2021-11-21 01:19:20,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:19:20,160 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 17 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 53 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 [2021-11-21 01:19:20,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 53 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:19:20,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-21 01:19:20,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2021-11-21 01:19:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 states have internal predecessors, (71), 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) [2021-11-21 01:19:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-11-21 01:19:20,172 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 24 [2021-11-21 01:19:20,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:19:20,172 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-11-21 01:19:20,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:19:20,173 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-11-21 01:19:20,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 01:19:20,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:19:20,174 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:19:20,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:19:20,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:19:20,390 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:19:20,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:19:20,390 INFO L85 PathProgramCache]: Analyzing trace with hash -852785558, now seen corresponding path program 1 times [2021-11-21 01:19:20,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:19:20,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341897296] [2021-11-21 01:19:20,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:20,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:19:20,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:19:20,392 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:19:20,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-21 01:19:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:20,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:19:20,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:19:20,673 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 [2021-11-21 01:19:20,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:19:20,840 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-21 01:19:20,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-21 01:19:20,851 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 [2021-11-21 01:19:20,880 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-11-21 01:19:20,880 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 [2021-11-21 01:19:21,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-21 01:19:21,078 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 [2021-11-21 01:19:21,219 INFO L354 Elim1Store]: treesize reduction 58, result has 30.1 percent of original size [2021-11-21 01:19:21,219 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 35 treesize of output 32 [2021-11-21 01:19:21,291 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 15 treesize of output 7 [2021-11-21 01:19:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:19:21,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:19:41,773 WARN L838 $PredicateComparison]: unable to prove that (or (= (_ bv3 32) |c_ULTIMATE.start_main_#t~mem7#1|) (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (|ULTIMATE.start_main_~t~0#1.offset| (_ BitVec 32))) (= (_ bv3 32) (let ((.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd |ULTIMATE.start_main_~t~0#1.offset| (_ bv4 32)) v_DerPreprocessor_7)) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~a~0#1.base|) .cse0)) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~a~0#1.base|) .cse0)))))) is different from false [2021-11-21 01:19:41,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:19:41,841 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 213 treesize of output 216 [2021-11-21 01:19:42,691 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 167 treesize of output 161 [2021-11-21 01:19:42,701 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 365 treesize of output 347 [2021-11-21 01:19:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:19:43,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:19:43,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341897296] [2021-11-21 01:19:43,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341897296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:19:43,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1485598294] [2021-11-21 01:19:43,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:43,057 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:19:43,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:19:43,058 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:19:43,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce03091a-27f5-4ff8-87ab-e3dcb8672858/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-21 01:19:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:43,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-21 01:19:43,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:19:43,269 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 [2021-11-21 01:19:43,487 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 [2021-11-21 01:19:43,627 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:19:43,629 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 [2021-11-21 01:19:43,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:19:43,793 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 [2021-11-21 01:19:43,810 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 [2021-11-21 01:19:43,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:19:43,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 46 [2021-11-21 01:19:43,990 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 01:19:43,991 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 41 treesize of output 34 [2021-11-21 01:19:44,268 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 11 [2021-11-21 01:19:44,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:19:44,388 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:19:44,388 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 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 01:19:44,727 INFO L354 Elim1Store]: treesize reduction 58, result has 30.1 percent of original size [2021-11-21 01:19:44,727 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 34 treesize of output 31 [2021-11-21 01:19:44,934 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 [2021-11-21 01:19:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:19:45,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:19:59,645 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~t~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_10 (_ 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|) (bvadd |ULTIMATE.start_main_~t~0#1.offset| (_ bv4 32)) v_DerPreprocessor_10)) |c_ULTIMATE.start_main_~l1~0#1.base|) |c_ULTIMATE.start_main_~l1~0#1.offset|) (_ bv1 32))) is different from false [2021-11-21 01:20:01,702 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (|v_ULTIMATE.start_main_~t~0#1.offset_45| (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~t~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~t~0#1.base|) (bvadd |c_ULTIMATE.start_main_~t~0#1.offset| (_ bv4 32)) v_DerPreprocessor_11)))) (store .cse0 |c_ULTIMATE.start_main_~p~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~p~0#1.base|) (bvadd |v_ULTIMATE.start_main_~t~0#1.offset_45| (_ bv4 32)) v_DerPreprocessor_10))) |c_ULTIMATE.start_main_~t~0#1.base|) |c_ULTIMATE.start_main_~t~0#1.offset|) (_ bv1 32))) is different from false [2021-11-21 01:20:03,725 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (|v_ULTIMATE.start_main_~t~0#1.offset_45| (_ BitVec 32))) (= (select (select (let ((.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~p~0#1.offset|))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse2 v_DerPreprocessor_11))) (.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) .cse2))) (store .cse0 .cse1 (store (select .cse0 .cse1) (bvadd |v_ULTIMATE.start_main_~t~0#1.offset_45| (_ bv4 32)) v_DerPreprocessor_10)))) |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset|) (_ bv1 32))) is different from false [2021-11-21 01:20:05,763 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (|v_ULTIMATE.start_main_~t~0#1.offset_45| (_ BitVec 32))) (= (_ bv1 32) (select (select (let ((.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse2 v_DerPreprocessor_11))) (.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))) (store .cse0 .cse1 (store (select .cse0 .cse1) (bvadd |v_ULTIMATE.start_main_~t~0#1.offset_45| (_ bv4 32)) v_DerPreprocessor_10)))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2021-11-21 01:20:12,181 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 766 treesize of output 742 [2021-11-21 01:20:26,148 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (v_arrayElimCell_56 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32)) (|v_ULTIMATE.start_main_~t~0#1.offset_45| (_ BitVec 32))) (let ((.cse7 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~t~0#1.base|)) (.cse3 (= |c_ULTIMATE.start_main_~t~0#1.offset| .cse7)) (.cse1 (let ((.cse6 (let ((.cse8 (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 .cse8 |c_ULTIMATE.start_main_~t~0#1.base| (store (select .cse8 |c_ULTIMATE.start_main_~t~0#1.base|) |c_ULTIMATE.start_main_~t~0#1.offset| (_ bv3 32)))))) (store .cse6 |c_ULTIMATE.start_main_~a~0#1.base| (store (select .cse6 |c_ULTIMATE.start_main_~a~0#1.base|) .cse7 v_DerPreprocessor_11)))) (.cse2 (bvadd |v_ULTIMATE.start_main_~t~0#1.offset_45| (_ bv4 32)))) (or (and .cse0 (= (select (select (store .cse1 v_DerPreprocessor_12 (store (select .cse1 v_DerPreprocessor_12) .cse2 v_DerPreprocessor_10)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32)) .cse3) (and (or (not .cse0) (not .cse3)) (let ((.cse5 (= |c_ULTIMATE.start_main_~p~0#1.offset| |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse4 (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~p~0#1.base|))) (or (and (= (select (select (store .cse1 v_arrayElimCell_56 (store (select .cse1 v_arrayElimCell_56) .cse2 v_DerPreprocessor_10)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32)) (or (not .cse4) (not .cse5))) (and (= (select (select (store .cse1 |c_ULTIMATE.start_main_~t~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~t~0#1.base|) .cse2 v_DerPreprocessor_10)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (_ bv1 32)) .cse5 .cse4)))))))) is different from false