./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH --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 e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:52:46,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:52:46,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:52:46,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:52:46,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:52:46,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:52:46,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:52:46,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:52:46,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:52:46,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:52:46,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:52:46,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:52:46,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:52:46,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:52:46,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:52:46,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:52:46,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:52:46,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:52:46,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:52:46,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:52:46,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:52:46,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:52:46,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:52:46,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:52:46,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:52:46,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:52:46,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:52:46,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:52:46,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:52:46,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:52:46,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:52:46,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:52:46,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:52:46,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:52:46,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:52:46,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:52:46,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:52:46,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:52:46,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:52:46,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:52:46,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:52:46,163 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 03:52:46,204 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:52:46,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:52:46,206 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:52:46,207 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:52:46,207 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:52:46,207 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:52:46,207 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:52:46,208 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:52:46,208 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:52:46,208 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:52:46,209 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:52:46,209 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:52:46,210 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:52:46,210 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:52:46,210 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:52:46,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:52:46,211 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:52:46,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:52:46,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:52:46,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:52:46,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:52:46,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:52:46,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:52:46,213 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:52:46,213 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:52:46,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:52:46,213 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:52:46,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:52:46,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:52:46,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:52:46,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:52:46,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:52:46,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:52:46,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:52:46,217 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:52:46,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:52:46,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:52:46,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:52:46,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:52:46,218 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_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 [2021-11-03 03:52:46,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:52:46,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:52:46,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:52:46,541 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:52:46,542 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:52:46,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-11-03 03:52:46,609 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/data/f5a677b55/041a223c4aec42f496841ef4874f442b/FLAG481cf2c45 [2021-11-03 03:52:47,144 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:52:47,145 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-11-03 03:52:47,171 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/data/f5a677b55/041a223c4aec42f496841ef4874f442b/FLAG481cf2c45 [2021-11-03 03:52:47,438 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/data/f5a677b55/041a223c4aec42f496841ef4874f442b [2021-11-03 03:52:47,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:52:47,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:52:47,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:52:47,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:52:47,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:52:47,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:52:47" (1/1) ... [2021-11-03 03:52:47,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769ccc22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:47, skipping insertion in model container [2021-11-03 03:52:47,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:52:47" (1/1) ... [2021-11-03 03:52:47,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:52:47,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:52:47,893 WARN L228 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_3037a789-427b-4b91-bd9c-e670b50fda8c/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-11-03 03:52:47,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:52:47,911 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:52:47,990 WARN L228 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_3037a789-427b-4b91-bd9c-e670b50fda8c/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-11-03 03:52:47,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:52:48,031 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:52:48,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:48 WrapperNode [2021-11-03 03:52:48,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:52:48,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:52:48,033 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:52:48,033 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:52:48,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:48" (1/1) ... [2021-11-03 03:52:48,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:48" (1/1) ... [2021-11-03 03:52:48,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:52:48,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:52:48,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:52:48,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:52:48,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:48" (1/1) ... [2021-11-03 03:52:48,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:48" (1/1) ... [2021-11-03 03:52:48,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:48" (1/1) ... [2021-11-03 03:52:48,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:48" (1/1) ... [2021-11-03 03:52:48,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:48" (1/1) ... [2021-11-03 03:52:48,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:48" (1/1) ... [2021-11-03 03:52:48,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:48" (1/1) ... [2021-11-03 03:52:48,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:52:48,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:52:48,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:52:48,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:52:48,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:48" (1/1) ... [2021-11-03 03:52:48,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:52:48,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:52:48,228 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:52:48,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:52:48,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-03 03:52:48,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-03 03:52:48,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 03:52:48,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 03:52:48,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:52:48,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 03:52:48,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 03:52:48,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 03:52:48,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 03:52:48,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:52:48,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:52:49,605 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:52:49,605 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2021-11-03 03:52:49,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:52:49 BoogieIcfgContainer [2021-11-03 03:52:49,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:52:49,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:52:49,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:52:49,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:52:49,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:52:47" (1/3) ... [2021-11-03 03:52:49,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31c64b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:52:49, skipping insertion in model container [2021-11-03 03:52:49,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:48" (2/3) ... [2021-11-03 03:52:49,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31c64b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:52:49, skipping insertion in model container [2021-11-03 03:52:49,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:52:49" (3/3) ... [2021-11-03 03:52:49,616 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2021-11-03 03:52:49,622 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:52:49,622 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 03:52:49,671 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:52:49,677 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 [2021-11-03 03:52:49,677 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 03:52:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 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) [2021-11-03 03:52:49,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-03 03:52:49,697 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:52:49,697 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:52:49,698 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:52:49,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:52:49,703 INFO L85 PathProgramCache]: Analyzing trace with hash 996164333, now seen corresponding path program 1 times [2021-11-03 03:52:49,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:52:49,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030568312] [2021-11-03 03:52:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:52:49,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:52:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:52:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:49,939 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:52:49,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030568312] [2021-11-03 03:52:49,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030568312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:52:49,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:52:49,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 03:52:49,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732434247] [2021-11-03 03:52:49,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:52:49,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:52:49,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:52:49,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:52:49,967 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 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) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-03 03:52:50,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:52:50,019 INFO L93 Difference]: Finished difference Result 35 states and 52 transitions. [2021-11-03 03:52:50,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:52:50,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-03 03:52:50,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:52:50,029 INFO L225 Difference]: With dead ends: 35 [2021-11-03 03:52:50,029 INFO L226 Difference]: Without dead ends: 13 [2021-11-03 03:52:50,032 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:52:50,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-03 03:52:50,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-11-03 03:52:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-03 03:52:50,063 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2021-11-03 03:52:50,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:52:50,064 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-03 03:52:50,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-03 03:52:50,064 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-03 03:52:50,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 03:52:50,065 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:52:50,065 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:52:50,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 03:52:50,066 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:52:50,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:52:50,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1987806749, now seen corresponding path program 1 times [2021-11-03 03:52:50,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:52:50,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142480329] [2021-11-03 03:52:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:52:50,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:52:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:52:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:50,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:52:50,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142480329] [2021-11-03 03:52:50,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142480329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:52:50,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:52:50,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-03 03:52:50,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324300122] [2021-11-03 03:52:50,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 03:52:50,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:52:50,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 03:52:50,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-03 03:52:50,832 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 9 states, 9 states have (on average 1.0) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:51,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:52:51,807 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2021-11-03 03:52:51,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 03:52:51,808 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.0) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-03 03:52:51,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:52:51,809 INFO L225 Difference]: With dead ends: 17 [2021-11-03 03:52:51,809 INFO L226 Difference]: Without dead ends: 15 [2021-11-03 03:52:51,810 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-03 03:52:51,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-03 03:52:51,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-11-03 03:52:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2021-11-03 03:52:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-03 03:52:51,815 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2021-11-03 03:52:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:52:51,816 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-03 03:52:51,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.0) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-03 03:52:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 03:52:51,817 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:52:51,817 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:52:51,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 03:52:51,818 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:52:51,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:52:51,818 INFO L85 PathProgramCache]: Analyzing trace with hash 979771364, now seen corresponding path program 1 times [2021-11-03 03:52:51,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:52:51,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700144597] [2021-11-03 03:52:51,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:52:51,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:52:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:52:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:52,279 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:52:52,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700144597] [2021-11-03 03:52:52,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700144597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:52:52,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:52:52,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-03 03:52:52,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069131042] [2021-11-03 03:52:52,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 03:52:52,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:52:52,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 03:52:52,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-03 03:52:52,287 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 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) [2021-11-03 03:52:53,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:52:53,099 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-11-03 03:52:53,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 03:52:53,100 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 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 [2021-11-03 03:52:53,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:52:53,100 INFO L225 Difference]: With dead ends: 19 [2021-11-03 03:52:53,100 INFO L226 Difference]: Without dead ends: 16 [2021-11-03 03:52:53,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-03 03:52:53,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-03 03:52:53,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-11-03 03:52:53,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-03 03:52:53,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-11-03 03:52:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:52:53,107 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-03 03:52:53,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 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) [2021-11-03 03:52:53,107 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-03 03:52:53,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 03:52:53,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:52:53,108 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:52:53,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 03:52:53,108 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:52:53,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:52:53,109 INFO L85 PathProgramCache]: Analyzing trace with hash 308182394, now seen corresponding path program 1 times [2021-11-03 03:52:53,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:52:53,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907430829] [2021-11-03 03:52:53,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:52:53,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:52:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:52:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:53,679 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:52:53,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907430829] [2021-11-03 03:52:53,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907430829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 03:52:53,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464705315] [2021-11-03 03:52:53,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:52:53,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:52:53,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:52:53,686 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:52:53,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 03:52:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:52:53,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-03 03:52:53,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:52:53,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:52:54,086 INFO L354 Elim1Store]: treesize reduction 118, result has 18.1 percent of original size [2021-11-03 03:52:54,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 36 [2021-11-03 03:52:54,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:52:54,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:52:54,816 INFO L354 Elim1Store]: treesize reduction 118, result has 19.2 percent of original size [2021-11-03 03:52:54,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 47 treesize of output 71 [2021-11-03 03:52:55,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 54 [2021-11-03 03:52:55,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-03 03:52:55,325 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 43 treesize of output 27 [2021-11-03 03:52:55,862 INFO L354 Elim1Store]: treesize reduction 166, result has 16.2 percent of original size [2021-11-03 03:52:55,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 296 treesize of output 188 [2021-11-03 03:52:55,881 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:52:55,885 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 260 [2021-11-03 03:52:55,921 INFO L354 Elim1Store]: treesize reduction 116, result has 18.9 percent of original size [2021-11-03 03:52:55,921 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 2 case distinctions, treesize of input 260 treesize of output 203 [2021-11-03 03:52:55,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:52:55,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:52:56,033 INFO L354 Elim1Store]: treesize reduction 160, result has 27.6 percent of original size [2021-11-03 03:52:56,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 185 treesize of output 219 [2021-11-03 03:52:56,596 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:52:56,605 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1057 [2021-11-03 03:52:56,635 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:52:56,640 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1054 [2021-11-03 03:52:59,390 INFO L354 Elim1Store]: treesize reduction 96, result has 27.8 percent of original size [2021-11-03 03:52:59,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1054 treesize of output 1052 [2021-11-03 03:52:59,460 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:52:59,464 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1607 [2021-11-03 03:52:59,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:53:00,893 INFO L354 Elim1Store]: treesize reduction 1433, result has 4.1 percent of original size [2021-11-03 03:53:00,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 2246 treesize of output 1376 [2021-11-03 03:53:01,012 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:53:01,018 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1606 [2021-11-03 03:53:01,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:53:02,113 INFO L354 Elim1Store]: treesize reduction 1734, result has 6.4 percent of original size [2021-11-03 03:53:02,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 26 case distinctions, treesize of input 1653 treesize of output 823 [2021-11-03 03:53:02,175 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-03 03:53:02,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-03 03:53:02,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1041010766] [2021-11-03 03:53:02,252 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-03 03:53:02,252 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 03:53:02,256 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 03:53:02,261 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 03:53:02,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 03:53:02,292 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:53:02,293 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:53:02,295 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:53:02,295 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-03 03:53:02,296 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 03:53:02,297 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:53:02,297 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-11-03 03:53:02,299 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-11-03 03:53:02,315 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@381181d2 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) 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.computeCostEstimation(ElimStorePlain.java:571) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.doElimAllRec(ElimStorePlain.java:444) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:242) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:402) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:228) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java: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:609) 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) [2021-11-03 03:53:02,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-03 03:53:02,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-03 03:53:02,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595013553] [2021-11-03 03:53:02,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-03 03:53:02,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:53:02,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-03 03:53:02,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-11-03 03:53:02,322 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 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) [2021-11-03 03:53:02,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 03:53:02,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 03:53:02,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:53:02,543 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@381181d2 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) 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.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) 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:869) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:783) 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) [2021-11-03 03:53:02,545 INFO L168 Benchmark]: Toolchain (without parser) took 15102.37 ms. Allocated memory was 98.6 MB in the beginning and 144.7 MB in the end (delta: 46.1 MB). Free memory was 57.9 MB in the beginning and 58.0 MB in the end (delta: -129.2 kB). Peak memory consumption was 46.9 MB. Max. memory is 16.1 GB. [2021-11-03 03:53:02,546 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 98.6 MB. Free memory was 76.0 MB in the beginning and 75.9 MB in the end (delta: 52.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:53:02,546 INFO L168 Benchmark]: CACSL2BoogieTranslator took 587.48 ms. Allocated memory is still 98.6 MB. Free memory was 57.7 MB in the beginning and 66.2 MB in the end (delta: -8.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-03 03:53:02,547 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.27 ms. Allocated memory is still 98.6 MB. Free memory was 66.2 MB in the beginning and 63.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 03:53:02,547 INFO L168 Benchmark]: Boogie Preprocessor took 73.34 ms. Allocated memory is still 98.6 MB. Free memory was 63.9 MB in the beginning and 62.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 03:53:02,548 INFO L168 Benchmark]: RCFGBuilder took 1425.07 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 62.0 MB in the beginning and 85.1 MB in the end (delta: -23.1 MB). Peak memory consumption was 31.0 MB. Max. memory is 16.1 GB. [2021-11-03 03:53:02,549 INFO L168 Benchmark]: TraceAbstraction took 12934.50 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 84.6 MB in the beginning and 58.0 MB in the end (delta: 26.6 MB). Peak memory consumption was 51.8 MB. Max. memory is 16.1 GB. [2021-11-03 03:53:02,552 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 98.6 MB. Free memory was 76.0 MB in the beginning and 75.9 MB in the end (delta: 52.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 587.48 ms. Allocated memory is still 98.6 MB. Free memory was 57.7 MB in the beginning and 66.2 MB in the end (delta: -8.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.27 ms. Allocated memory is still 98.6 MB. Free memory was 66.2 MB in the beginning and 63.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 73.34 ms. Allocated memory is still 98.6 MB. Free memory was 63.9 MB in the beginning and 62.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1425.07 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 62.0 MB in the beginning and 85.1 MB in the end (delta: -23.1 MB). Peak memory consumption was 31.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12934.50 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 84.6 MB in the beginning and 58.0 MB in the end (delta: 26.6 MB). Peak memory consumption was 51.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@381181d2 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@381181d2: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-03 03:53:02,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/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_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH --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 e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:53:05,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:53:05,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:53:05,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:53:05,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:53:05,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:53:05,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:53:05,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:53:05,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:53:05,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:53:05,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:53:05,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:53:05,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:53:05,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:53:05,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:53:05,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:53:05,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:53:05,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:53:05,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:53:05,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:53:05,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:53:05,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:53:05,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:53:05,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:53:05,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:53:05,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:53:05,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:53:05,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:53:05,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:53:05,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:53:05,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:53:05,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:53:05,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:53:05,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:53:05,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:53:05,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:53:05,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:53:05,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:53:05,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:53:05,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:53:05,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:53:05,204 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 03:53:05,248 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:53:05,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:53:05,250 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:53:05,250 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:53:05,250 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:53:05,250 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:53:05,251 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:53:05,251 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:53:05,251 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:53:05,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:53:05,254 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:53:05,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:53:05,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:53:05,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:53:05,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:53:05,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:53:05,255 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:53:05,256 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 03:53:05,256 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 03:53:05,256 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:53:05,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:53:05,257 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:53:05,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:53:05,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:53:05,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 03:53:05,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:53:05,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:53:05,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:53:05,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:53:05,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:53:05,259 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 03:53:05,259 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 03:53:05,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:53:05,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:53:05,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:53:05,261 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_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 [2021-11-03 03:53:05,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:53:05,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:53:05,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:53:05,664 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:53:05,664 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:53:05,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-11-03 03:53:05,743 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/data/5b53f9389/4af943de07634ec181045831dcfbb55d/FLAG82b435351 [2021-11-03 03:53:06,396 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:53:06,397 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-11-03 03:53:06,418 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/data/5b53f9389/4af943de07634ec181045831dcfbb55d/FLAG82b435351 [2021-11-03 03:53:06,651 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/data/5b53f9389/4af943de07634ec181045831dcfbb55d [2021-11-03 03:53:06,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:53:06,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:53:06,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:53:06,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:53:06,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:53:06,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:53:06" (1/1) ... [2021-11-03 03:53:06,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@507cc7b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:06, skipping insertion in model container [2021-11-03 03:53:06,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:53:06" (1/1) ... [2021-11-03 03:53:06,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:53:06,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:53:07,180 WARN L228 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_3037a789-427b-4b91-bd9c-e670b50fda8c/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-11-03 03:53:07,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:53:07,196 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:53:07,245 WARN L228 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_3037a789-427b-4b91-bd9c-e670b50fda8c/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-11-03 03:53:07,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:53:07,282 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:53:07,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:07 WrapperNode [2021-11-03 03:53:07,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:53:07,284 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:53:07,284 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:53:07,285 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:53:07,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:07" (1/1) ... [2021-11-03 03:53:07,311 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:07" (1/1) ... [2021-11-03 03:53:07,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:53:07,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:53:07,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:53:07,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:53:07,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:07" (1/1) ... [2021-11-03 03:53:07,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:07" (1/1) ... [2021-11-03 03:53:07,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:07" (1/1) ... [2021-11-03 03:53:07,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:07" (1/1) ... [2021-11-03 03:53:07,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:07" (1/1) ... [2021-11-03 03:53:07,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:07" (1/1) ... [2021-11-03 03:53:07,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:07" (1/1) ... [2021-11-03 03:53:07,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:53:07,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:53:07,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:53:07,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:53:07,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:07" (1/1) ... [2021-11-03 03:53:07,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:53:07,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:53:07,443 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:53:07,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:53:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 03:53:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 03:53:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 03:53:07,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:53:07,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 03:53:07,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 03:53:07,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 03:53:07,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 03:53:07,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 03:53:07,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:53:07,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:53:08,370 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:53:08,371 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2021-11-03 03:53:08,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:53:08 BoogieIcfgContainer [2021-11-03 03:53:08,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:53:08,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:53:08,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:53:08,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:53:08,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:53:06" (1/3) ... [2021-11-03 03:53:08,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc5305b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:53:08, skipping insertion in model container [2021-11-03 03:53:08,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:07" (2/3) ... [2021-11-03 03:53:08,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc5305b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:53:08, skipping insertion in model container [2021-11-03 03:53:08,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:53:08" (3/3) ... [2021-11-03 03:53:08,385 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2021-11-03 03:53:08,390 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:53:08,391 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 03:53:08,455 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:53:08,464 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 [2021-11-03 03:53:08,465 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 03:53:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 34 states have internal predecessors, (48), 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) [2021-11-03 03:53:08,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-03 03:53:08,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:53:08,493 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:53:08,493 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:53:08,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:53:08,500 INFO L85 PathProgramCache]: Analyzing trace with hash -978429474, now seen corresponding path program 1 times [2021-11-03 03:53:08,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:53:08,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812899550] [2021-11-03 03:53:08,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:53:08,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:53:08,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:53:08,525 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:53:08,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 03:53:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:53:08,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 03:53:08,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:53:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:08,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:53:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:08,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:53:08,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812899550] [2021-11-03 03:53:08,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812899550] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:53:08,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:53:08,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:53:08,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974567671] [2021-11-03 03:53:08,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:53:08,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:53:08,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:53:08,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:53:08,989 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:53:09,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:53:09,027 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2021-11-03 03:53:09,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:53:09,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-03 03:53:09,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:53:09,037 INFO L225 Difference]: With dead ends: 64 [2021-11-03 03:53:09,037 INFO L226 Difference]: Without dead ends: 31 [2021-11-03 03:53:09,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:53:09,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-03 03:53:09,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-11-03 03:53:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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) [2021-11-03 03:53:09,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-03 03:53:09,080 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2021-11-03 03:53:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:53:09,081 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-03 03:53:09,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:53:09,082 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-03 03:53:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 03:53:09,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:53:09,083 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:53:09,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 03:53:09,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:53:09,291 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:53:09,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:53:09,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1498712942, now seen corresponding path program 1 times [2021-11-03 03:53:09,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:53:09,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185171312] [2021-11-03 03:53:09,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:53:09,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:53:09,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:53:09,296 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:53:09,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 03:53:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:53:09,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-03 03:53:09,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:53:10,144 INFO L354 Elim1Store]: treesize reduction 193, result has 11.1 percent of original size [2021-11-03 03:53:10,145 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 3 case distinctions, treesize of input 42 treesize of output 34 [2021-11-03 03:53:10,369 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-03 03:53:10,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-11-03 03:53:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:10,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:53:10,497 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:53:10,500 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-03 03:53:12,584 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 181 treesize of output 173 [2021-11-03 03:53:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:13,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:53:13,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185171312] [2021-11-03 03:53:13,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185171312] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:53:13,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:53:13,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 19 [2021-11-03 03:53:13,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870348083] [2021-11-03 03:53:13,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-03 03:53:13,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:53:13,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-03 03:53:13,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=281, Unknown=1, NotChecked=0, Total=342 [2021-11-03 03:53:13,323 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 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) [2021-11-03 03:53:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:53:18,922 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-11-03 03:53:18,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 03:53:18,923 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 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 22 [2021-11-03 03:53:18,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:53:18,924 INFO L225 Difference]: With dead ends: 49 [2021-11-03 03:53:18,924 INFO L226 Difference]: Without dead ends: 29 [2021-11-03 03:53:18,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=203, Invalid=552, Unknown=1, NotChecked=0, Total=756 [2021-11-03 03:53:18,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-03 03:53:18,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-11-03 03:53:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 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) [2021-11-03 03:53:18,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-11-03 03:53:18,933 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2021-11-03 03:53:18,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:53:18,934 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-03 03:53:18,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 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) [2021-11-03 03:53:18,934 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-11-03 03:53:18,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 03:53:18,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:53:18,936 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:53:18,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 03:53:19,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:53:19,153 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:53:19,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:53:19,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1496865900, now seen corresponding path program 1 times [2021-11-03 03:53:19,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:53:19,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760388181] [2021-11-03 03:53:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:53:19,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:53:19,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:53:19,156 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:53:19,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 03:53:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:53:19,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-03 03:53:19,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:53:19,533 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-03 03:53:19,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 [2021-11-03 03:53:19,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:53:19,823 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-03 03:53:19,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 34 [2021-11-03 03:53:20,737 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-03 03:53:20,738 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 1 case distinctions, treesize of input 50 treesize of output 37 [2021-11-03 03:53:21,089 INFO L354 Elim1Store]: treesize reduction 50, result has 38.3 percent of original size [2021-11-03 03:53:21,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 68 [2021-11-03 03:53:21,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:53:21,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:53:21,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:53:21,870 INFO L354 Elim1Store]: treesize reduction 453, result has 5.8 percent of original size [2021-11-03 03:53:21,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 108 [2021-11-03 03:53:21,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:53:21,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:53:21,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:53:21,966 INFO L354 Elim1Store]: treesize reduction 112, result has 5.9 percent of original size [2021-11-03 03:53:21,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 96 [2021-11-03 03:53:22,261 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 [2021-11-03 03:53:29,224 WARN L207 SmtUtils]: Spent 6.12 s on a formula simplification. DAG size of input: 90 DAG size of output: 26 [2021-11-03 03:53:29,225 INFO L354 Elim1Store]: treesize reduction 363, result has 8.8 percent of original size [2021-11-03 03:53:29,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 973 treesize of output 632 [2021-11-03 03:53:33,199 INFO L354 Elim1Store]: treesize reduction 999, result has 8.8 percent of original size [2021-11-03 03:53:33,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 634 treesize of output 278 [2021-11-03 03:53:33,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:53:33,232 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 514 [2021-11-03 03:53:33,242 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:53:33,244 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 551 [2021-11-03 03:53:33,255 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:53:33,262 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 600 [2021-11-03 03:53:34,353 INFO L354 Elim1Store]: treesize reduction 788, result has 11.0 percent of original size [2021-11-03 03:53:34,354 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 4 case distinctions, treesize of input 600 treesize of output 437 [2021-11-03 03:53:34,417 INFO L354 Elim1Store]: treesize reduction 129, result has 16.2 percent of original size [2021-11-03 03:53:34,418 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 416 treesize of output 395 [2021-11-03 03:53:34,420 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-03 03:53:34,982 INFO L354 Elim1Store]: treesize reduction 128, result has 14.1 percent of original size [2021-11-03 03:53:34,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 268 treesize of output 143 [2021-11-03 03:53:35,030 INFO L354 Elim1Store]: treesize reduction 108, result has 0.9 percent of original size [2021-11-03 03:53:35,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 119 treesize of output 85 [2021-11-03 03:53:35,384 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 31 treesize of output 23 [2021-11-03 03:53:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:35,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:53:35,742 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:53:35,743 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 888 [2021-11-03 03:53:35,748 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:53:35,750 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 902 [2021-11-03 03:53:35,754 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:53:35,756 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 942 [2021-11-03 03:53:35,760 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:53:35,762 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 990 [2021-11-03 03:53:35,766 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:53:35,768 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1101 [2021-11-03 03:54:03,883 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_6 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (v_ULTIMATE.start_dll_circular_prepend_~old_head~0.offset_5 (_ BitVec 32)) (v_ULTIMATE.start_dll_circular_prepend_~last~1.offset_5 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (= (let ((.cse12 (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_circular_prepend_~head.base))) (let ((.cse5 (select .cse12 c_ULTIMATE.start_dll_circular_prepend_~head.offset)) (.cse17 (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_dll_circular_prepend_~head.base))) (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_node_create_#res.offset|)) (.cse3 (select (select |c_#memory_$Pointer$.base| .cse5) (bvadd (_ bv4 32) (select .cse17 c_ULTIMATE.start_dll_circular_prepend_~head.offset)))) (.cse6 (bvadd (_ bv4 32) v_ULTIMATE.start_dll_circular_prepend_~old_head~0.offset_5))) (select (select (let ((.cse0 (let ((.cse2 (let ((.cse4 (let ((.cse7 (store |c_#memory_int| c_ULTIMATE.start_dll_circular_prepend_~head.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_circular_prepend_~head.base) c_ULTIMATE.start_dll_circular_prepend_~head.offset v_DerPreprocessor_9)))) (store .cse7 |c_ULTIMATE.start_node_create_#res.base| (store (select .cse7 |c_ULTIMATE.start_node_create_#res.base|) |c_ULTIMATE.start_node_create_#res.offset| v_DerPreprocessor_8))))) (store .cse4 .cse5 (store (select .cse4 .cse5) .cse6 v_DerPreprocessor_7))))) (store .cse2 .cse3 (store (select .cse2 .cse3) v_ULTIMATE.start_dll_circular_prepend_~last~1.offset_5 v_DerPreprocessor_6))))) (store .cse0 |c_ULTIMATE.start_node_create_#res.base| (store (select .cse0 |c_ULTIMATE.start_node_create_#res.base|) .cse1 v_DerPreprocessor_5))) (select (select (let ((.cse8 (let ((.cse9 (let ((.cse10 (let ((.cse11 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_circular_prepend_~head.base (store .cse12 c_ULTIMATE.start_dll_circular_prepend_~head.offset |c_ULTIMATE.start_node_create_#res.base|)))) (store .cse11 |c_ULTIMATE.start_node_create_#res.base| (store (select .cse11 |c_ULTIMATE.start_node_create_#res.base|) |c_ULTIMATE.start_node_create_#res.offset| .cse5))))) (store .cse10 .cse5 (store (select .cse10 .cse5) .cse6 |c_ULTIMATE.start_node_create_#res.base|))))) (store .cse9 .cse3 (store (select .cse9 .cse3) v_ULTIMATE.start_dll_circular_prepend_~last~1.offset_5 |c_ULTIMATE.start_node_create_#res.base|))))) (store .cse8 |c_ULTIMATE.start_node_create_#res.base| (store (select .cse8 |c_ULTIMATE.start_node_create_#res.base|) .cse1 .cse3))) |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)) (bvadd (select (select (let ((.cse13 (let ((.cse14 (let ((.cse15 (let ((.cse16 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_dll_circular_prepend_~head.base (store .cse17 c_ULTIMATE.start_dll_circular_prepend_~head.offset |c_ULTIMATE.start_node_create_#res.offset|)))) (store .cse16 |c_ULTIMATE.start_node_create_#res.base| (store (select .cse16 |c_ULTIMATE.start_node_create_#res.base|) |c_ULTIMATE.start_node_create_#res.offset| v_ULTIMATE.start_dll_circular_prepend_~old_head~0.offset_5))))) (store .cse15 .cse5 (store (select .cse15 .cse5) .cse6 |c_ULTIMATE.start_node_create_#res.offset|))))) (store .cse14 .cse3 (store (select .cse14 .cse3) v_ULTIMATE.start_dll_circular_prepend_~last~1.offset_5 |c_ULTIMATE.start_node_create_#res.offset|))))) (store .cse13 |c_ULTIMATE.start_node_create_#res.base| (store (select .cse13 |c_ULTIMATE.start_node_create_#res.base|) .cse1 v_ULTIMATE.start_dll_circular_prepend_~last~1.offset_5))) |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|) (_ bv8 32)))))) c_ULTIMATE.start_main_~data~0)) is different from false [2021-11-03 03:54:04,140 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 101236634 treesize of output 100466586 [2021-11-03 03:54:11,591 WARN L207 SmtUtils]: Spent 7.45 s on a formula simplification that was a NOOP. DAG size: 1042 [2021-11-03 03:54:18,637 WARN L207 SmtUtils]: Spent 6.96 s on a formula simplification that was a NOOP. DAG size: 1046 [2021-11-03 03:54:18,638 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:54:25,437 WARN L207 SmtUtils]: Spent 6.79 s on a formula simplification that was a NOOP. DAG size: 1028 [2021-11-03 03:54:32,162 WARN L207 SmtUtils]: Spent 6.72 s on a formula simplification that was a NOOP. DAG size: 1038 [2021-11-03 03:54:32,168 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 198375866 [2021-11-03 03:54:38,983 WARN L207 SmtUtils]: Spent 6.73 s on a formula simplification that was a NOOP. DAG size: 1038 [2021-11-03 03:54:45,814 WARN L207 SmtUtils]: Spent 6.75 s on a formula simplification that was a NOOP. DAG size: 1042 [2021-11-03 03:54:45,815 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:54:52,553 WARN L207 SmtUtils]: Spent 6.73 s on a formula simplification that was a NOOP. DAG size: 1034 [2021-11-03 03:54:59,345 WARN L207 SmtUtils]: Spent 6.79 s on a formula simplification that was a NOOP. DAG size: 1034 [2021-11-03 03:54:59,346 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 375366670 [2021-11-03 03:55:06,171 WARN L207 SmtUtils]: Spent 6.73 s on a formula simplification that was a NOOP. DAG size: 1034 [2021-11-03 03:55:20,024 WARN L207 SmtUtils]: Spent 13.46 s on a formula simplification that was a NOOP. DAG size: 1038 [2021-11-03 03:55:36,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:55:36,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760388181] [2021-11-03 03:55:36,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-03 03:55:36,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1514819620] [2021-11-03 03:55:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:55:36,290 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:55:36,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:55:36,302 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:55:36,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-03 03:55:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:55:36,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-03 03:55:36,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:55:36,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:55:36,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-03 03:55:37,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:55:37,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:55:37,890 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-03 03:55:37,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 32 [2021-11-03 03:55:40,058 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-03 03:55:40,059 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 1 case distinctions, treesize of input 48 treesize of output 35 [2021-11-03 03:55:40,627 INFO L354 Elim1Store]: treesize reduction 72, result has 30.1 percent of original size [2021-11-03 03:55:40,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 66 [2021-11-03 03:55:41,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:55:41,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:55:41,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:55:41,929 INFO L354 Elim1Store]: treesize reduction 358, result has 7.3 percent of original size [2021-11-03 03:55:41,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 143 treesize of output 107 [2021-11-03 03:55:41,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:55:41,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:55:41,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:55:41,982 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-03 03:55:41,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 112 [2021-11-03 03:55:42,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 03:56:00,884 WARN L207 SmtUtils]: Spent 16.37 s on a formula simplification. DAG size of input: 122 DAG size of output: 36 [2021-11-03 03:56:00,885 INFO L354 Elim1Store]: treesize reduction 576, result has 9.3 percent of original size [2021-11-03 03:56:00,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 1069 treesize of output 523 [2021-11-03 03:56:01,878 INFO L354 Elim1Store]: treesize reduction 475, result has 9.4 percent of original size [2021-11-03 03:56:01,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 839 treesize of output 392 [2021-11-03 03:56:01,891 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:01,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 458 [2021-11-03 03:56:01,899 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:01,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 495 [2021-11-03 03:56:01,907 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:01,909 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 544 [2021-11-03 03:56:02,244 INFO L354 Elim1Store]: treesize reduction 689, result has 12.3 percent of original size [2021-11-03 03:56:02,245 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 4 case distinctions, treesize of input 544 treesize of output 381 [2021-11-03 03:56:02,281 INFO L354 Elim1Store]: treesize reduction 129, result has 16.2 percent of original size [2021-11-03 03:56:02,281 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 360 treesize of output 339 [2021-11-03 03:56:02,282 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-03 03:56:03,848 INFO L354 Elim1Store]: treesize reduction 89, result has 4.3 percent of original size [2021-11-03 03:56:03,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 196 treesize of output 107 [2021-11-03 03:56:03,868 INFO L354 Elim1Store]: treesize reduction 92, result has 1.1 percent of original size [2021-11-03 03:56:03,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 73 treesize of output 51 [2021-11-03 03:56:04,102 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 31 treesize of output 23 [2021-11-03 03:56:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:56:04,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:56:04,156 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:04,158 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 960 [2021-11-03 03:56:04,163 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:04,164 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 974 [2021-11-03 03:56:04,168 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:04,170 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1022 [2021-11-03 03:56:04,174 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:04,175 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1070 [2021-11-03 03:56:04,179 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:04,186 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1181 [2021-11-03 03:56:06,514 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_dll_circular_prepend_~last~1.offset_6 (_ BitVec 32)) (v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32)) (v_DerPreprocessor_18 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32)) (v_DerPreprocessor_16 (_ BitVec 32))) (= (let ((.cse18 (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_dll_circular_prepend_~head.base))) (let ((.cse17 (select .cse18 c_ULTIMATE.start_dll_circular_prepend_~head.offset)) (.cse12 (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_circular_prepend_~head.base))) (let ((.cse5 (select .cse12 c_ULTIMATE.start_dll_circular_prepend_~head.offset)) (.cse6 (bvadd (_ bv4 32) .cse17))) (let ((.cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_dll_circular_prepend_~new_head~1.offset)) (.cse3 (select (select |c_#memory_$Pointer$.base| .cse5) .cse6))) (select (select (let ((.cse0 (let ((.cse2 (let ((.cse4 (let ((.cse7 (store |c_#memory_int| c_ULTIMATE.start_dll_circular_prepend_~head.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_circular_prepend_~head.base) c_ULTIMATE.start_dll_circular_prepend_~head.offset v_DerPreprocessor_19)))) (store .cse7 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base (store (select .cse7 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base) c_ULTIMATE.start_dll_circular_prepend_~new_head~1.offset v_DerPreprocessor_18))))) (store .cse4 .cse5 (store (select .cse4 .cse5) .cse6 v_DerPreprocessor_17))))) (store .cse2 .cse3 (store (select .cse2 .cse3) v_ULTIMATE.start_dll_circular_prepend_~last~1.offset_6 v_DerPreprocessor_16))))) (store .cse0 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base (store (select .cse0 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base) .cse1 v_DerPreprocessor_15))) (select (select (let ((.cse8 (let ((.cse9 (let ((.cse10 (let ((.cse11 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_circular_prepend_~head.base (store .cse12 c_ULTIMATE.start_dll_circular_prepend_~head.offset c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base)))) (store .cse11 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base (store (select .cse11 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base) c_ULTIMATE.start_dll_circular_prepend_~new_head~1.offset .cse5))))) (store .cse10 .cse5 (store (select .cse10 .cse5) .cse6 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base))))) (store .cse9 .cse3 (store (select .cse9 .cse3) v_ULTIMATE.start_dll_circular_prepend_~last~1.offset_6 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base))))) (store .cse8 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base (store (select .cse8 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base) .cse1 .cse3))) |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)) (bvadd (_ bv8 32) (select (select (let ((.cse13 (let ((.cse14 (let ((.cse15 (let ((.cse16 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_dll_circular_prepend_~head.base (store .cse18 c_ULTIMATE.start_dll_circular_prepend_~head.offset c_ULTIMATE.start_dll_circular_prepend_~new_head~1.offset)))) (store .cse16 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base (store (select .cse16 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base) c_ULTIMATE.start_dll_circular_prepend_~new_head~1.offset .cse17))))) (store .cse15 .cse5 (store (select .cse15 .cse5) .cse6 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.offset))))) (store .cse14 .cse3 (store (select .cse14 .cse3) v_ULTIMATE.start_dll_circular_prepend_~last~1.offset_6 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.offset))))) (store .cse13 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base (store (select .cse13 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base) .cse1 v_ULTIMATE.start_dll_circular_prepend_~last~1.offset_6))) |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))))))) c_ULTIMATE.start_main_~data~0)) is different from false [2021-11-03 03:56:08,980 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_dll_circular_prepend_~last~1.offset_6 (_ BitVec 32)) (v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32)) (v_DerPreprocessor_18 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32)) (v_DerPreprocessor_16 (_ BitVec 32))) (= (let ((.cse18 (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_dll_circular_prepend_~head.base))) (let ((.cse17 (select .cse18 c_ULTIMATE.start_dll_circular_prepend_~head.offset)) (.cse12 (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_circular_prepend_~head.base))) (let ((.cse5 (select .cse12 c_ULTIMATE.start_dll_circular_prepend_~head.offset)) (.cse6 (bvadd (_ bv4 32) .cse17))) (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_node_create_#res.offset|)) (.cse3 (select (select |c_#memory_$Pointer$.base| .cse5) .cse6))) (select (select (let ((.cse0 (let ((.cse2 (let ((.cse4 (let ((.cse7 (store |c_#memory_int| c_ULTIMATE.start_dll_circular_prepend_~head.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_circular_prepend_~head.base) c_ULTIMATE.start_dll_circular_prepend_~head.offset v_DerPreprocessor_19)))) (store .cse7 |c_ULTIMATE.start_node_create_#res.base| (store (select .cse7 |c_ULTIMATE.start_node_create_#res.base|) |c_ULTIMATE.start_node_create_#res.offset| v_DerPreprocessor_18))))) (store .cse4 .cse5 (store (select .cse4 .cse5) .cse6 v_DerPreprocessor_17))))) (store .cse2 .cse3 (store (select .cse2 .cse3) v_ULTIMATE.start_dll_circular_prepend_~last~1.offset_6 v_DerPreprocessor_16))))) (store .cse0 |c_ULTIMATE.start_node_create_#res.base| (store (select .cse0 |c_ULTIMATE.start_node_create_#res.base|) .cse1 v_DerPreprocessor_15))) (select (select (let ((.cse8 (let ((.cse9 (let ((.cse10 (let ((.cse11 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_circular_prepend_~head.base (store .cse12 c_ULTIMATE.start_dll_circular_prepend_~head.offset |c_ULTIMATE.start_node_create_#res.base|)))) (store .cse11 |c_ULTIMATE.start_node_create_#res.base| (store (select .cse11 |c_ULTIMATE.start_node_create_#res.base|) |c_ULTIMATE.start_node_create_#res.offset| .cse5))))) (store .cse10 .cse5 (store (select .cse10 .cse5) .cse6 |c_ULTIMATE.start_node_create_#res.base|))))) (store .cse9 .cse3 (store (select .cse9 .cse3) v_ULTIMATE.start_dll_circular_prepend_~last~1.offset_6 |c_ULTIMATE.start_node_create_#res.base|))))) (store .cse8 |c_ULTIMATE.start_node_create_#res.base| (store (select .cse8 |c_ULTIMATE.start_node_create_#res.base|) .cse1 .cse3))) |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)) (bvadd (_ bv8 32) (select (select (let ((.cse13 (let ((.cse14 (let ((.cse15 (let ((.cse16 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_dll_circular_prepend_~head.base (store .cse18 c_ULTIMATE.start_dll_circular_prepend_~head.offset |c_ULTIMATE.start_node_create_#res.offset|)))) (store .cse16 |c_ULTIMATE.start_node_create_#res.base| (store (select .cse16 |c_ULTIMATE.start_node_create_#res.base|) |c_ULTIMATE.start_node_create_#res.offset| .cse17))))) (store .cse15 .cse5 (store (select .cse15 .cse5) .cse6 |c_ULTIMATE.start_node_create_#res.offset|))))) (store .cse14 .cse3 (store (select .cse14 .cse3) v_ULTIMATE.start_dll_circular_prepend_~last~1.offset_6 |c_ULTIMATE.start_node_create_#res.offset|))))) (store .cse13 |c_ULTIMATE.start_node_create_#res.base| (store (select .cse13 |c_ULTIMATE.start_node_create_#res.base|) .cse1 v_ULTIMATE.start_dll_circular_prepend_~last~1.offset_6))) |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))))))) c_ULTIMATE.start_main_~data~0)) is different from false [2021-11-03 03:56:09,139 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 13726070 treesize of output 13621622 [2021-11-03 03:56:11,053 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:12,752 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35792626 [2021-11-03 03:56:14,508 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:16,148 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52803282 [2021-11-03 03:56:22,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-03 03:56:22,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889425283] [2021-11-03 03:56:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:56:22,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:56:22,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:56:22,567 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:56:22,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-03 03:56:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:56:22,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-03 03:56:22,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:56:22,838 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-03 03:56:22,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 22 [2021-11-03 03:56:23,888 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-03 03:56:23,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 47 [2021-11-03 03:56:25,751 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-03 03:56:25,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 47 [2021-11-03 03:56:26,293 INFO L354 Elim1Store]: treesize reduction 12, result has 72.1 percent of original size [2021-11-03 03:56:26,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 81 [2021-11-03 03:56:27,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 03:56:27,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:56:27,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:56:27,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:56:27,244 INFO L354 Elim1Store]: treesize reduction 342, result has 5.8 percent of original size [2021-11-03 03:56:27,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 161 treesize of output 107 [2021-11-03 03:56:27,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:56:27,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:56:27,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 03:56:27,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 126 [2021-11-03 03:56:56,079 WARN L207 SmtUtils]: Spent 27.49 s on a formula simplification. DAG size of input: 177 DAG size of output: 44 [2021-11-03 03:56:56,080 INFO L354 Elim1Store]: treesize reduction 974, result has 6.3 percent of original size [2021-11-03 03:56:56,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 1003 treesize of output 485 [2021-11-03 03:56:57,105 INFO L354 Elim1Store]: treesize reduction 499, result has 9.3 percent of original size [2021-11-03 03:56:57,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 819 treesize of output 425 [2021-11-03 03:56:57,114 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:57,115 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 481 [2021-11-03 03:56:57,127 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:57,129 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 558 [2021-11-03 03:56:57,135 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:57,137 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 659 [2021-11-03 03:56:57,141 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:57,142 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 772 [2021-11-03 03:56:57,363 INFO L354 Elim1Store]: treesize reduction 861, result has 8.3 percent of original size [2021-11-03 03:56:57,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 772 treesize of output 358 [2021-11-03 03:56:57,365 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-03 03:56:58,083 INFO L354 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2021-11-03 03:56:58,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 260 treesize of output 127 [2021-11-03 03:56:58,115 INFO L354 Elim1Store]: treesize reduction 92, result has 1.1 percent of original size [2021-11-03 03:56:58,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 99 treesize of output 73 [2021-11-03 03:56:59,627 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 [2021-11-03 03:56:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:56:59,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:56:59,678 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:59,679 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 888 [2021-11-03 03:56:59,682 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:59,683 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 902 [2021-11-03 03:56:59,686 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:59,687 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 942 [2021-11-03 03:56:59,697 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:59,698 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 990 [2021-11-03 03:56:59,702 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 03:56:59,702 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1101 [2021-11-03 03:57:24,440 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 806864433 treesize of output 800704049 [2021-11-03 03:58:20,565 WARN L207 SmtUtils]: Spent 56.12 s on a formula simplification that was a NOOP. DAG size: 1750 [2021-11-03 03:59:16,647 WARN L207 SmtUtils]: Spent 55.93 s on a formula simplification that was a NOOP. DAG size: 1754 [2021-11-03 03:59:16,648 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:00:12,775 WARN L207 SmtUtils]: Spent 56.12 s on a formula simplification that was a NOOP. DAG size: 1736 [2021-11-03 04:01:09,073 WARN L207 SmtUtils]: Spent 56.29 s on a formula simplification that was a NOOP. DAG size: 1746 [2021-11-03 04:01:09,075 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1579289179 [2021-11-03 04:02:05,403 WARN L207 SmtUtils]: Spent 56.17 s on a formula simplification that was a NOOP. DAG size: 1746 [2021-11-03 04:03:01,903 WARN L207 SmtUtils]: Spent 56.32 s on a formula simplification that was a NOOP. DAG size: 1750 [2021-11-03 04:03:01,904 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:03:58,031 WARN L207 SmtUtils]: Spent 56.12 s on a formula simplification that was a NOOP. DAG size: 1742 [2021-11-03 04:04:54,248 WARN L207 SmtUtils]: Spent 56.21 s on a formula simplification that was a NOOP. DAG size: 1742 [2021-11-03 04:04:54,250 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2986056381 [2021-11-03 04:05:50,772 WARN L207 SmtUtils]: Spent 56.36 s on a formula simplification that was a NOOP. DAG size: 1742 [2021-11-03 04:05:50,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-03 04:05:50,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:05:50,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-03 04:05:50,834 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-03 04:05:50,834 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-03 04:05:50,843 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 04:05:50,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:05:51,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-03 04:05:51,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-03 04:05:51,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:05:51,449 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-03 04:05:51,451 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 04:05:51,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 04:05:51 BoogieIcfgContainer [2021-11-03 04:05:51,465 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 04:05:51,465 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 04:05:51,466 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 04:05:51,466 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 04:05:51,466 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:53:08" (3/4) ... [2021-11-03 04:05:51,482 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-03 04:05:51,482 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 04:05:51,483 INFO L168 Benchmark]: Toolchain (without parser) took 764826.11 ms. Allocated memory was 58.7 MB in the beginning and 587.2 MB in the end (delta: 528.5 MB). Free memory was 36.0 MB in the beginning and 459.3 MB in the end (delta: -423.3 MB). Peak memory consumption was 104.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:05:51,483 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 58.7 MB. Free memory is still 39.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:05:51,484 INFO L168 Benchmark]: CACSL2BoogieTranslator took 622.43 ms. Allocated memory was 58.7 MB in the beginning and 81.8 MB in the end (delta: 23.1 MB). Free memory was 35.8 MB in the beginning and 57.3 MB in the end (delta: -21.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:05:51,484 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.88 ms. Allocated memory is still 81.8 MB. Free memory was 57.3 MB in the beginning and 54.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:05:51,484 INFO L168 Benchmark]: Boogie Preprocessor took 52.63 ms. Allocated memory is still 81.8 MB. Free memory was 54.7 MB in the beginning and 52.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:05:51,485 INFO L168 Benchmark]: RCFGBuilder took 979.95 ms. Allocated memory is still 81.8 MB. Free memory was 52.6 MB in the beginning and 54.2 MB in the end (delta: -1.6 MB). Peak memory consumption was 15.3 MB. Max. memory is 16.1 GB. [2021-11-03 04:05:51,485 INFO L168 Benchmark]: TraceAbstraction took 763087.28 ms. Allocated memory was 81.8 MB in the beginning and 587.2 MB in the end (delta: 505.4 MB). Free memory was 53.5 MB in the beginning and 459.3 MB in the end (delta: -405.8 MB). Peak memory consumption was 354.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:05:51,485 INFO L168 Benchmark]: Witness Printer took 16.80 ms. Allocated memory is still 587.2 MB. Free memory is still 459.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:05:51,487 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 58.7 MB. Free memory is still 39.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 622.43 ms. Allocated memory was 58.7 MB in the beginning and 81.8 MB in the end (delta: 23.1 MB). Free memory was 35.8 MB in the beginning and 57.3 MB in the end (delta: -21.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.88 ms. Allocated memory is still 81.8 MB. Free memory was 57.3 MB in the beginning and 54.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.63 ms. Allocated memory is still 81.8 MB. Free memory was 54.7 MB in the beginning and 52.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 979.95 ms. Allocated memory is still 81.8 MB. Free memory was 52.6 MB in the beginning and 54.2 MB in the end (delta: -1.6 MB). Peak memory consumption was 15.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 763087.28 ms. Allocated memory was 81.8 MB in the beginning and 587.2 MB in the end (delta: 505.4 MB). Free memory was 53.5 MB in the beginning and 459.3 MB in the end (delta: -405.8 MB). Peak memory consumption was 354.4 MB. Max. memory is 16.1 GB. * Witness Printer took 16.80 ms. Allocated memory is still 587.2 MB. Free memory is still 459.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 647]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L629] const int len = 2; [L630] const int data = 1; [L631] DLL s = dll_circular_create(len, data); [L576] DLL temp = (DLL) malloc(sizeof(struct node)); [L577] COND FALSE !(((void *)0) == temp) [L580] temp->next = ((void *)0) [L581] temp->prev = ((void *)0) [L582] temp->data = data [L583] return temp; [L586] DLL head = node_create(data); [L587] DLL last = head; [L588] COND TRUE len > 1 [L576] DLL temp = (DLL) malloc(sizeof(struct node)); [L577] COND FALSE !(((void *)0) == temp) [L580] temp->next = ((void *)0) [L581] temp->prev = ((void *)0) [L582] temp->data = data [L583] return temp; [L589] DLL new_head = node_create(data); [L590] new_head->next = head [L591] COND TRUE \read(head) [L592] head->prev = new_head [L594] head = new_head [L595] len-- [L588] COND FALSE !(len > 1) [L597] last->next = head [L598] head->prev = last [L599] return head; [L631] DLL s = dll_circular_create(len, data); [L576] DLL temp = (DLL) malloc(sizeof(struct node)); [L577] COND FALSE !(((void *)0) == temp) [L580] temp->next = ((void *)0) [L581] temp->prev = ((void *)0) [L582] temp->data = data [L583] return temp; [L613] DLL new_head = node_create(data); [L614] EXPR \read(*head) [L614] COND FALSE !(((void *)0) == *head) [L619] EXPR \read(*head) [L619] EXPR (*head)->prev [L619] DLL last = (*head)->prev; [L620] EXPR \read(*head) [L620] DLL old_head = *head; [L621] *head = new_head [L622] new_head->next = old_head [L623] old_head->prev = new_head [L624] last->next = new_head [L625] new_head->prev = last [L633] EXPR \read(s) [L633] DLL ptr = s; [L634] int count = 0; [L636] EXPR ptr->data [L636] COND TRUE data != ptr->data [L647] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 762.9s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 52 SDtfs, 143 SDslu, 92 SDs, 0 SdLazy, 139 SolverSat, 41 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 140.9s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 93 ConstructedInterpolants, 19 QuantifiedInterpolants, 1707 SizeOfPredicates, 64 NumberOfNonLiveVariables, 351 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 3/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-03 04:05:51,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3037a789-427b-4b91-bd9c-e670b50fda8c/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN