./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 e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE --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 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE --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 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 09:16:49,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 09:16:49,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 09:16:49,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 09:16:49,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 09:16:49,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 09:16:49,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 09:16:49,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 09:16:49,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 09:16:49,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 09:16:49,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 09:16:49,094 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 09:16:49,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 09:16:49,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 09:16:49,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 09:16:49,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 09:16:49,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 09:16:49,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 09:16:49,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 09:16:49,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 09:16:49,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 09:16:49,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 09:16:49,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 09:16:49,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 09:16:49,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 09:16:49,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 09:16:49,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 09:16:49,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 09:16:49,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 09:16:49,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 09:16:49,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 09:16:49,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 09:16:49,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 09:16:49,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 09:16:49,149 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 09:16:49,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 09:16:49,150 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 09:16:49,151 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 09:16:49,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 09:16:49,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 09:16:49,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 09:16:49,154 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 09:16:49,199 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 09:16:49,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 09:16:49,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 09:16:49,202 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 09:16:49,203 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 09:16:49,203 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 09:16:49,203 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 09:16:49,203 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 09:16:49,204 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 09:16:49,204 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 09:16:49,205 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 09:16:49,205 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 09:16:49,206 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 09:16:49,206 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 09:16:49,206 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 09:16:49,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 09:16:49,207 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 09:16:49,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 09:16:49,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 09:16:49,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 09:16:49,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 09:16:49,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 09:16:49,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 09:16:49,209 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 09:16:49,209 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 09:16:49,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 09:16:49,210 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 09:16:49,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 09:16:49,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 09:16:49,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 09:16:49,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:16:49,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 09:16:49,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 09:16:49,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 09:16:49,213 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 09:16:49,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 09:16:49,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 09:16:49,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 09:16:49,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 09:16:49,215 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_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 [2021-10-24 09:16:49,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 09:16:49,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 09:16:49,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 09:16:49,490 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 09:16:49,491 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 09:16:49,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-10-24 09:16:49,558 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/data/b7bb1c516/caec53792bf14ccd8d2b0ce70f8621cc/FLAGd9a0ab81c [2021-10-24 09:16:50,090 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 09:16:50,091 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-10-24 09:16:50,104 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/data/b7bb1c516/caec53792bf14ccd8d2b0ce70f8621cc/FLAGd9a0ab81c [2021-10-24 09:16:50,391 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/data/b7bb1c516/caec53792bf14ccd8d2b0ce70f8621cc [2021-10-24 09:16:50,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 09:16:50,394 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 09:16:50,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 09:16:50,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 09:16:50,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 09:16:50,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:16:50" (1/1) ... [2021-10-24 09:16:50,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eb85e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:50, skipping insertion in model container [2021-10-24 09:16:50,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:16:50" (1/1) ... [2021-10-24 09:16:50,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 09:16:50,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 09:16:50,769 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_2f079be2-c88f-4824-84cb-4e067fc468c0/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-10-24 09:16:50,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:16:50,781 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 09:16:50,827 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_2f079be2-c88f-4824-84cb-4e067fc468c0/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-10-24 09:16:50,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:16:50,860 INFO L208 MainTranslator]: Completed translation [2021-10-24 09:16:50,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:50 WrapperNode [2021-10-24 09:16:50,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 09:16:50,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 09:16:50,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 09:16:50,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 09:16:50,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:50" (1/1) ... [2021-10-24 09:16:50,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:50" (1/1) ... [2021-10-24 09:16:50,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 09:16:50,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 09:16:50,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 09:16:50,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 09:16:50,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:50" (1/1) ... [2021-10-24 09:16:50,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:50" (1/1) ... [2021-10-24 09:16:50,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:50" (1/1) ... [2021-10-24 09:16:50,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:50" (1/1) ... [2021-10-24 09:16:50,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:50" (1/1) ... [2021-10-24 09:16:50,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:50" (1/1) ... [2021-10-24 09:16:50,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:50" (1/1) ... [2021-10-24 09:16:50,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 09:16:50,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 09:16:50,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 09:16:50,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 09:16:50,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:50" (1/1) ... [2021-10-24 09:16:50,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:16:50,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:16:51,005 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 09:16:51,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 09:16:51,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-24 09:16:51,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-24 09:16:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 09:16:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-24 09:16:51,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 09:16:51,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-24 09:16:51,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 09:16:51,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-24 09:16:51,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 09:16:51,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 09:16:51,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 09:16:52,448 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 09:16:52,449 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2021-10-24 09:16:52,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:16:52 BoogieIcfgContainer [2021-10-24 09:16:52,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 09:16:52,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 09:16:52,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 09:16:52,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 09:16:52,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 09:16:50" (1/3) ... [2021-10-24 09:16:52,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a3e6859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:16:52, skipping insertion in model container [2021-10-24 09:16:52,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:50" (2/3) ... [2021-10-24 09:16:52,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a3e6859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:16:52, skipping insertion in model container [2021-10-24 09:16:52,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:16:52" (3/3) ... [2021-10-24 09:16:52,461 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2021-10-24 09:16:52,467 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 09:16:52,468 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 09:16:52,520 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 09:16:52,527 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 [2021-10-24 09:16:52,527 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 09:16:52,542 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) [2021-10-24 09:16:52,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-24 09:16:52,547 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:16:52,548 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:16:52,549 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:16:52,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:16:52,555 INFO L82 PathProgramCache]: Analyzing trace with hash 996164333, now seen corresponding path program 1 times [2021-10-24 09:16:52,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:16:52,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311660024] [2021-10-24 09:16:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:16:52,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:16:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:16:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:16:52,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:16:52,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311660024] [2021-10-24 09:16:52,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311660024] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:16:52,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:16:52,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 09:16:52,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951818711] [2021-10-24 09:16:52,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 09:16:52,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:16:52,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 09:16:52,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:16:52,837 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) [2021-10-24 09:16:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:16:52,881 INFO L93 Difference]: Finished difference Result 35 states and 52 transitions. [2021-10-24 09:16:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:16:52,883 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 [2021-10-24 09:16:52,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:16:52,891 INFO L225 Difference]: With dead ends: 35 [2021-10-24 09:16:52,891 INFO L226 Difference]: Without dead ends: 13 [2021-10-24 09:16:52,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 09:16:52,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-24 09:16:52,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-10-24 09:16:52,922 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) [2021-10-24 09:16:52,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-10-24 09:16:52,924 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2021-10-24 09:16:52,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:16:52,925 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-10-24 09:16:52,925 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) [2021-10-24 09:16:52,925 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-10-24 09:16:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-24 09:16:52,926 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:16:52,926 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:16:52,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 09:16:52,927 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:16:52,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:16:52,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1987806749, now seen corresponding path program 1 times [2021-10-24 09:16:52,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:16:52,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070797021] [2021-10-24 09:16:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:16:52,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:16:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:16:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:16:53,626 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:16:53,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070797021] [2021-10-24 09:16:53,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070797021] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:16:53,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:16:53,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-24 09:16:53,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106194931] [2021-10-24 09:16:53,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 09:16:53,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:16:53,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 09:16:53,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-24 09:16:53,634 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) [2021-10-24 09:16:54,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:16:54,626 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2021-10-24 09:16:54,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 09:16:54,627 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 [2021-10-24 09:16:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:16:54,628 INFO L225 Difference]: With dead ends: 17 [2021-10-24 09:16:54,628 INFO L226 Difference]: Without dead ends: 15 [2021-10-24 09:16:54,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 368.8ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-24 09:16:54,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-24 09:16:54,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-10-24 09:16:54,633 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) [2021-10-24 09:16:54,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-24 09:16:54,634 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2021-10-24 09:16:54,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:16:54,634 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-24 09:16:54,635 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) [2021-10-24 09:16:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-24 09:16:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-24 09:16:54,635 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:16:54,635 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:16:54,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 09:16:54,636 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:16:54,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:16:54,637 INFO L82 PathProgramCache]: Analyzing trace with hash 979771364, now seen corresponding path program 1 times [2021-10-24 09:16:54,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:16:54,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834699396] [2021-10-24 09:16:54,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:16:54,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:16:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:16:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:16:54,974 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:16:54,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834699396] [2021-10-24 09:16:54,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834699396] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:16:54,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:16:54,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-24 09:16:54,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922728835] [2021-10-24 09:16:54,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 09:16:54,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:16:54,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 09:16:54,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-24 09:16:54,977 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) [2021-10-24 09:16:55,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:16:55,760 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-10-24 09:16:55,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 09:16:55,761 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 [2021-10-24 09:16:55,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:16:55,762 INFO L225 Difference]: With dead ends: 19 [2021-10-24 09:16:55,762 INFO L226 Difference]: Without dead ends: 16 [2021-10-24 09:16:55,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-10-24 09:16:55,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-24 09:16:55,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-10-24 09:16:55,767 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) [2021-10-24 09:16:55,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-10-24 09:16:55,767 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-10-24 09:16:55,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:16:55,768 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-24 09:16:55,768 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) [2021-10-24 09:16:55,768 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-10-24 09:16:55,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-24 09:16:55,769 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:16:55,769 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:16:55,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 09:16:55,770 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:16:55,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:16:55,771 INFO L82 PathProgramCache]: Analyzing trace with hash 308182394, now seen corresponding path program 1 times [2021-10-24 09:16:55,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:16:55,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050735421] [2021-10-24 09:16:55,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:16:55,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:16:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:16:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:16:56,280 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:16:56,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050735421] [2021-10-24 09:16:56,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050735421] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 09:16:56,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062199548] [2021-10-24 09:16:56,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:16:56,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 09:16:56,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:16:56,287 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 09:16:56,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 09:16:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:16:56,439 WARN L261 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 96 conjunts are in the unsatisfiable core [2021-10-24 09:16:56,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:16:56,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:16:56,646 INFO L354 Elim1Store]: treesize reduction 118, result has 18.1 percent of original size [2021-10-24 09:16:56,649 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 [2021-10-24 09:16:57,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:16:57,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:16:57,362 INFO L354 Elim1Store]: treesize reduction 118, result has 19.2 percent of original size [2021-10-24 09:16:57,363 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 [2021-10-24 09:16:57,889 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 [2021-10-24 09:16:57,896 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 [2021-10-24 09:16:57,902 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 [2021-10-24 09:16:58,476 INFO L354 Elim1Store]: treesize reduction 166, result has 16.2 percent of original size [2021-10-24 09:16:58,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 296 treesize of output 188 [2021-10-24 09:16:58,494 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:16:58,497 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 260 [2021-10-24 09:16:58,533 INFO L354 Elim1Store]: treesize reduction 116, result has 18.9 percent of original size [2021-10-24 09:16:58,533 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 [2021-10-24 09:16:58,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:16:58,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:16:58,627 INFO L354 Elim1Store]: treesize reduction 160, result has 27.6 percent of original size [2021-10-24 09:16:58,628 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 [2021-10-24 09:16:59,192 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:16:59,201 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1057 [2021-10-24 09:16:59,230 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:16:59,235 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1054 [2021-10-24 09:17:02,037 INFO L354 Elim1Store]: treesize reduction 96, result has 27.8 percent of original size [2021-10-24 09:17:02,038 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 [2021-10-24 09:17:02,095 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:17:02,099 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1607 [2021-10-24 09:17:02,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-24 09:17:03,470 INFO L354 Elim1Store]: treesize reduction 1433, result has 4.1 percent of original size [2021-10-24 09:17:03,471 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 [2021-10-24 09:17:03,570 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:17:03,576 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1606 [2021-10-24 09:17:03,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-24 09:17:04,500 INFO L354 Elim1Store]: treesize reduction 1734, result has 6.4 percent of original size [2021-10-24 09:17:04,501 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 [2021-10-24 09:17:04,564 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-24 09:17:04,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-24 09:17:04,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1583860384] [2021-10-24 09:17:04,640 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-24 09:17:04,641 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 09:17:04,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 09:17:04,650 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 09:17:04,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 09:17:04,681 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:17:04,682 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 09:17:04,684 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:17:04,684 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-10-24 09:17:04,685 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 09:17:04,686 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:17:04,687 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-10-24 09:17:04,688 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-10-24 09:17:04,697 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@42d17e29 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:608) 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) [2021-10-24 09:17:04,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-24 09:17:04,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-24 09:17:04,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010825665] [2021-10-24 09:17:04,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-24 09:17:04,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:17:04,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-24 09:17:04,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-10-24 09:17:04,702 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) [2021-10-24 09:17:04,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 09:17:04,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-24 09:17:04,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 09:17:04,922 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@42d17e29 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:864) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) 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) [2021-10-24 09:17:04,925 INFO L168 Benchmark]: Toolchain (without parser) took 14530.39 ms. Allocated memory was 113.2 MB in the beginning and 184.5 MB in the end (delta: 71.3 MB). Free memory was 80.6 MB in the beginning and 51.8 MB in the end (delta: 28.8 MB). Peak memory consumption was 101.0 MB. Max. memory is 16.1 GB. [2021-10-24 09:17:04,926 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 113.2 MB. Free memory was 65.4 MB in the beginning and 65.3 MB in the end (delta: 50.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:17:04,926 INFO L168 Benchmark]: CACSL2BoogieTranslator took 464.67 ms. Allocated memory is still 113.2 MB. Free memory was 80.3 MB in the beginning and 80.2 MB in the end (delta: 171.5 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 09:17:04,927 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.07 ms. Allocated memory is still 113.2 MB. Free memory was 80.2 MB in the beginning and 77.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:17:04,927 INFO L168 Benchmark]: Boogie Preprocessor took 36.21 ms. Allocated memory is still 113.2 MB. Free memory was 77.7 MB in the beginning and 76.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:17:04,928 INFO L168 Benchmark]: RCFGBuilder took 1499.29 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 76.0 MB in the beginning and 99.6 MB in the end (delta: -23.6 MB). Peak memory consumption was 30.7 MB. Max. memory is 16.1 GB. [2021-10-24 09:17:04,929 INFO L168 Benchmark]: TraceAbstraction took 12470.20 ms. Allocated memory was 136.3 MB in the beginning and 184.5 MB in the end (delta: 48.2 MB). Free memory was 98.9 MB in the beginning and 51.8 MB in the end (delta: 47.1 MB). Peak memory consumption was 96.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:17:04,932 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 113.2 MB. Free memory was 65.4 MB in the beginning and 65.3 MB in the end (delta: 50.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 464.67 ms. Allocated memory is still 113.2 MB. Free memory was 80.3 MB in the beginning and 80.2 MB in the end (delta: 171.5 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.07 ms. Allocated memory is still 113.2 MB. Free memory was 80.2 MB in the beginning and 77.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.21 ms. Allocated memory is still 113.2 MB. Free memory was 77.7 MB in the beginning and 76.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1499.29 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 76.0 MB in the beginning and 99.6 MB in the end (delta: -23.6 MB). Peak memory consumption was 30.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12470.20 ms. Allocated memory was 136.3 MB in the beginning and 184.5 MB in the end (delta: 48.2 MB). Free memory was 98.9 MB in the beginning and 51.8 MB in the end (delta: 47.1 MB). Peak memory consumption was 96.1 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@42d17e29 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@42d17e29: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-24 09:17:04,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 09:17:07,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 09:17:07,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 09:17:07,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 09:17:07,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 09:17:07,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 09:17:07,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 09:17:07,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 09:17:07,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 09:17:07,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 09:17:07,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 09:17:07,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 09:17:07,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 09:17:07,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 09:17:07,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 09:17:07,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 09:17:07,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 09:17:07,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 09:17:07,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 09:17:07,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 09:17:07,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 09:17:07,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 09:17:07,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 09:17:07,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 09:17:07,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 09:17:07,346 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 09:17:07,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 09:17:07,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 09:17:07,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 09:17:07,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 09:17:07,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 09:17:07,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 09:17:07,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 09:17:07,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 09:17:07,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 09:17:07,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 09:17:07,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 09:17:07,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 09:17:07,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 09:17:07,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 09:17:07,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 09:17:07,362 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-24 09:17:07,389 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 09:17:07,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 09:17:07,391 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 09:17:07,391 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 09:17:07,391 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 09:17:07,391 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 09:17:07,392 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 09:17:07,392 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 09:17:07,392 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 09:17:07,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 09:17:07,393 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 09:17:07,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 09:17:07,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 09:17:07,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 09:17:07,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 09:17:07,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 09:17:07,395 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 09:17:07,395 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 09:17:07,395 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 09:17:07,395 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 09:17:07,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 09:17:07,396 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 09:17:07,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 09:17:07,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 09:17:07,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 09:17:07,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 09:17:07,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:17:07,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 09:17:07,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 09:17:07,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 09:17:07,398 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 09:17:07,398 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 09:17:07,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 09:17:07,399 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 09:17:07,399 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 09:17:07,399 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_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 [2021-10-24 09:17:07,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 09:17:07,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 09:17:07,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 09:17:07,824 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 09:17:07,825 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 09:17:07,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-10-24 09:17:07,898 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/data/5cdf27b25/b5c7e691678a4666a9900ac4bdab124a/FLAGd7399c2c5 [2021-10-24 09:17:08,549 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 09:17:08,549 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-10-24 09:17:08,577 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/data/5cdf27b25/b5c7e691678a4666a9900ac4bdab124a/FLAGd7399c2c5 [2021-10-24 09:17:08,829 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/data/5cdf27b25/b5c7e691678a4666a9900ac4bdab124a [2021-10-24 09:17:08,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 09:17:08,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 09:17:08,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 09:17:08,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 09:17:08,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 09:17:08,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:17:08" (1/1) ... [2021-10-24 09:17:08,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e08db84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:17:08, skipping insertion in model container [2021-10-24 09:17:08,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:17:08" (1/1) ... [2021-10-24 09:17:08,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 09:17:08,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 09:17:09,341 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_2f079be2-c88f-4824-84cb-4e067fc468c0/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-10-24 09:17:09,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:17:09,363 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 09:17:09,407 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_2f079be2-c88f-4824-84cb-4e067fc468c0/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-10-24 09:17:09,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:17:09,444 INFO L208 MainTranslator]: Completed translation [2021-10-24 09:17:09,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:17:09 WrapperNode [2021-10-24 09:17:09,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 09:17:09,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 09:17:09,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 09:17:09,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 09:17:09,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:17:09" (1/1) ... [2021-10-24 09:17:09,490 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:17:09" (1/1) ... [2021-10-24 09:17:09,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 09:17:09,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 09:17:09,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 09:17:09,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 09:17:09,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:17:09" (1/1) ... [2021-10-24 09:17:09,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:17:09" (1/1) ... [2021-10-24 09:17:09,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:17:09" (1/1) ... [2021-10-24 09:17:09,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:17:09" (1/1) ... [2021-10-24 09:17:09,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:17:09" (1/1) ... [2021-10-24 09:17:09,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:17:09" (1/1) ... [2021-10-24 09:17:09,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:17:09" (1/1) ... [2021-10-24 09:17:09,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 09:17:09,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 09:17:09,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 09:17:09,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 09:17:09,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:17:09" (1/1) ... [2021-10-24 09:17:09,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:17:09,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:17:09,663 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 09:17:09,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 09:17:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-24 09:17:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 09:17:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-24 09:17:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 09:17:09,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-24 09:17:09,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 09:17:09,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-24 09:17:09,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-24 09:17:09,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-24 09:17:09,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 09:17:09,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 09:17:10,491 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 09:17:10,492 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2021-10-24 09:17:10,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:17:10 BoogieIcfgContainer [2021-10-24 09:17:10,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 09:17:10,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 09:17:10,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 09:17:10,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 09:17:10,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 09:17:08" (1/3) ... [2021-10-24 09:17:10,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce8dbe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:17:10, skipping insertion in model container [2021-10-24 09:17:10,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:17:09" (2/3) ... [2021-10-24 09:17:10,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce8dbe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:17:10, skipping insertion in model container [2021-10-24 09:17:10,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:17:10" (3/3) ... [2021-10-24 09:17:10,502 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2021-10-24 09:17:10,507 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 09:17:10,507 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 09:17:10,554 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 09:17:10,560 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 [2021-10-24 09:17:10,560 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 09:17:10,584 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) [2021-10-24 09:17:10,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-24 09:17:10,589 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:17:10,590 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:17:10,590 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:17:10,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:17:10,607 INFO L82 PathProgramCache]: Analyzing trace with hash -978429474, now seen corresponding path program 1 times [2021-10-24 09:17:10,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:17:10,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9207545] [2021-10-24 09:17:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:17:10,626 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:17:10,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:17:10,632 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:17:10,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 09:17:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:17:10,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 09:17:10,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:17:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:17:10,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:17:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:17:10,986 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:17:10,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9207545] [2021-10-24 09:17:10,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9207545] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:17:10,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:17:10,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-24 09:17:10,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616779837] [2021-10-24 09:17:10,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 09:17:10,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:17:11,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 09:17:11,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 09:17:11,009 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) [2021-10-24 09:17:11,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:17:11,046 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2021-10-24 09:17:11,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 09:17:11,048 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 [2021-10-24 09:17:11,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:17:11,055 INFO L225 Difference]: With dead ends: 64 [2021-10-24 09:17:11,056 INFO L226 Difference]: Without dead ends: 31 [2021-10-24 09:17:11,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 09:17:11,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-24 09:17:11,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-10-24 09:17:11,088 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) [2021-10-24 09:17:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-10-24 09:17:11,090 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2021-10-24 09:17:11,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:17:11,091 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-10-24 09:17:11,091 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) [2021-10-24 09:17:11,091 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-10-24 09:17:11,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 09:17:11,092 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:17:11,093 INFO L512 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] [2021-10-24 09:17:11,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-24 09:17:11,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:17:11,307 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:17:11,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:17:11,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1498712942, now seen corresponding path program 1 times [2021-10-24 09:17:11,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:17:11,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948263295] [2021-10-24 09:17:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:17:11,314 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:17:11,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:17:11,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:17:11,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 09:17:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:17:11,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-24 09:17:11,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:17:12,146 INFO L354 Elim1Store]: treesize reduction 193, result has 11.1 percent of original size [2021-10-24 09:17:12,147 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 [2021-10-24 09:17:12,357 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-24 09:17:12,358 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 [2021-10-24 09:17:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:17:12,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:17:12,464 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:17:12,467 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-10-24 09:17:14,577 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 [2021-10-24 09:17:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:17:15,252 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:17:15,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948263295] [2021-10-24 09:17:15,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948263295] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:17:15,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:17:15,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 19 [2021-10-24 09:17:15,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055148729] [2021-10-24 09:17:15,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-24 09:17:15,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:17:15,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-24 09:17:15,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=281, Unknown=1, NotChecked=0, Total=342 [2021-10-24 09:17:15,256 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) [2021-10-24 09:17:21,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:17:21,703 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-10-24 09:17:21,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-24 09:17:21,704 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 [2021-10-24 09:17:21,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:17:21,705 INFO L225 Difference]: With dead ends: 49 [2021-10-24 09:17:21,705 INFO L226 Difference]: Without dead ends: 29 [2021-10-24 09:17:21,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 3183.1ms TimeCoverageRelationStatistics Valid=203, Invalid=552, Unknown=1, NotChecked=0, Total=756 [2021-10-24 09:17:21,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-24 09:17:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-10-24 09:17:21,711 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) [2021-10-24 09:17:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-10-24 09:17:21,713 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2021-10-24 09:17:21,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:17:21,713 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-24 09:17:21,713 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) [2021-10-24 09:17:21,714 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-10-24 09:17:21,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 09:17:21,715 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:17:21,715 INFO L512 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] [2021-10-24 09:17:21,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-24 09:17:21,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:17:21,942 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:17:21,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:17:21,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1496865900, now seen corresponding path program 1 times [2021-10-24 09:17:21,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:17:21,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876854730] [2021-10-24 09:17:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:17:21,944 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:17:21,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:17:21,946 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:17:21,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-24 09:17:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:17:22,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-24 09:17:22,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:17:22,336 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-24 09:17:22,337 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 [2021-10-24 09:17:22,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:17:22,592 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-24 09:17:22,592 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 [2021-10-24 09:17:23,429 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-24 09:17:23,429 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 [2021-10-24 09:17:23,749 INFO L354 Elim1Store]: treesize reduction 50, result has 38.3 percent of original size [2021-10-24 09:17:23,750 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 [2021-10-24 09:17:24,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:17:24,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:17:24,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:17:24,424 INFO L354 Elim1Store]: treesize reduction 453, result has 5.8 percent of original size [2021-10-24 09:17:24,425 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 [2021-10-24 09:17:24,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:17:24,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:17:24,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:17:24,523 INFO L354 Elim1Store]: treesize reduction 112, result has 5.9 percent of original size [2021-10-24 09:17:24,524 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 [2021-10-24 09:17:24,786 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 [2021-10-24 09:17:30,854 WARN L207 SmtUtils]: Spent 5.22 s on a formula simplification. DAG size of input: 90 DAG size of output: 26 [2021-10-24 09:17:30,855 INFO L354 Elim1Store]: treesize reduction 363, result has 8.8 percent of original size [2021-10-24 09:17:30,856 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 [2021-10-24 09:17:34,683 INFO L354 Elim1Store]: treesize reduction 999, result has 8.8 percent of original size [2021-10-24 09:17:34,684 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 [2021-10-24 09:17:34,703 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:17:34,705 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 514 [2021-10-24 09:17:34,723 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:17:34,726 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 551 [2021-10-24 09:17:34,736 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:17:34,743 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 600 [2021-10-24 09:17:35,760 INFO L354 Elim1Store]: treesize reduction 788, result has 11.0 percent of original size [2021-10-24 09:17:35,760 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 [2021-10-24 09:17:35,826 INFO L354 Elim1Store]: treesize reduction 129, result has 16.2 percent of original size [2021-10-24 09:17:35,827 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 [2021-10-24 09:17:35,829 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-24 09:17:36,424 INFO L354 Elim1Store]: treesize reduction 128, result has 14.1 percent of original size [2021-10-24 09:17:36,425 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 [2021-10-24 09:17:36,467 INFO L354 Elim1Store]: treesize reduction 108, result has 0.9 percent of original size [2021-10-24 09:17:36,467 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 [2021-10-24 09:17:36,799 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 [2021-10-24 09:17:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:17:36,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:17:37,087 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:17:37,088 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 888 [2021-10-24 09:17:37,093 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:17:37,094 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 902 [2021-10-24 09:17:37,099 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:17:37,100 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 942 [2021-10-24 09:17:37,119 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:17:37,121 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 990 [2021-10-24 09:17:37,128 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:17:37,129 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1101 [2021-10-24 09:17:39,626 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$.offset| c_ULTIMATE.start_dll_circular_prepend_~head.base))) (let ((.cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_dll_circular_prepend_~new_head~1.offset)) (.cse3 (select (select |c_#memory_$Pointer$.base| .cse5) (bvadd (_ bv4 32) (select .cse17 c_ULTIMATE.start_dll_circular_prepend_~head.offset)))) (.cse6 (bvadd (_ bv4 32) v_ULTIMATE.start_dll_circular_prepend_~old_head~0.offset_5))) (select (select (let ((.cse0 (let ((.cse2 (let ((.cse4 (let ((.cse7 (store |c_#memory_int| c_ULTIMATE.start_dll_circular_prepend_~head.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_circular_prepend_~head.base) c_ULTIMATE.start_dll_circular_prepend_~head.offset v_DerPreprocessor_9)))) (store .cse7 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base (store (select .cse7 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base) c_ULTIMATE.start_dll_circular_prepend_~new_head~1.offset v_DerPreprocessor_8))))) (store .cse4 .cse5 (store (select .cse4 .cse5) .cse6 v_DerPreprocessor_7))))) (store .cse2 .cse3 (store (select .cse2 .cse3) v_ULTIMATE.start_dll_circular_prepend_~last~1.offset_5 v_DerPreprocessor_6))))) (store .cse0 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base (store (select .cse0 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base) .cse1 v_DerPreprocessor_5))) (select (select (let ((.cse8 (let ((.cse9 (let ((.cse10 (let ((.cse11 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_circular_prepend_~head.base (store .cse12 c_ULTIMATE.start_dll_circular_prepend_~head.offset c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base)))) (store .cse11 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base (store (select .cse11 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base) c_ULTIMATE.start_dll_circular_prepend_~new_head~1.offset .cse5))))) (store .cse10 .cse5 (store (select .cse10 .cse5) .cse6 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base))))) (store .cse9 .cse3 (store (select .cse9 .cse3) v_ULTIMATE.start_dll_circular_prepend_~last~1.offset_5 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base))))) (store .cse8 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base (store (select .cse8 c_ULTIMATE.start_dll_circular_prepend_~new_head~1.base) .cse1 .cse3))) |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)) (bvadd (_ bv8 32) (select (select (let ((.cse13 (let ((.cse14 (let ((.cse15 (let ((.cse16 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_dll_circular_prepend_~head.base (store .cse17 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 v_ULTIMATE.start_dll_circular_prepend_~old_head~0.offset_5))))) (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_5 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_5))) |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)))))) c_ULTIMATE.start_main_~data~0)) is different from false [2021-10-24 09:17:42,204 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 [2021-10-24 09:17:42,407 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 [2021-10-24 09:17:50,494 WARN L207 SmtUtils]: Spent 8.09 s on a formula simplification that was a NOOP. DAG size: 1042 [2021-10-24 09:17:57,785 WARN L207 SmtUtils]: Spent 7.22 s on a formula simplification that was a NOOP. DAG size: 1046 [2021-10-24 09:17:57,786 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:18:04,982 WARN L207 SmtUtils]: Spent 7.19 s on a formula simplification that was a NOOP. DAG size: 1028 [2021-10-24 09:18:12,122 WARN L207 SmtUtils]: Spent 7.14 s on a formula simplification that was a NOOP. DAG size: 1038 [2021-10-24 09:18:12,126 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 198375866 [2021-10-24 09:18:19,393 WARN L207 SmtUtils]: Spent 7.19 s on a formula simplification that was a NOOP. DAG size: 1038 [2021-10-24 09:18:26,606 WARN L207 SmtUtils]: Spent 7.11 s on a formula simplification that was a NOOP. DAG size: 1042 [2021-10-24 09:18:26,607 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:18:33,787 WARN L207 SmtUtils]: Spent 7.18 s on a formula simplification that was a NOOP. DAG size: 1034 [2021-10-24 09:18:40,896 WARN L207 SmtUtils]: Spent 7.11 s on a formula simplification that was a NOOP. DAG size: 1034 [2021-10-24 09:18:40,897 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 375366670 [2021-10-24 09:18:48,142 WARN L207 SmtUtils]: Spent 7.17 s on a formula simplification that was a NOOP. DAG size: 1034 [2021-10-24 09:19:02,948 WARN L207 SmtUtils]: Spent 14.53 s on a formula simplification that was a NOOP. DAG size: 1038 [2021-10-24 09:19:20,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:19:20,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876854730] [2021-10-24 09:19:20,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-24 09:19:20,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [696712890] [2021-10-24 09:19:20,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:19:20,382 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 09:19:20,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 09:19:20,398 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 09:19:20,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-24 09:19:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:19:20,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-24 09:19:20,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:19:20,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:19:20,993 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 [2021-10-24 09:19:21,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:19:21,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:19:21,684 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-24 09:19:21,684 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 [2021-10-24 09:19:23,163 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-24 09:19:23,164 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 [2021-10-24 09:19:23,566 INFO L354 Elim1Store]: treesize reduction 72, result has 30.1 percent of original size [2021-10-24 09:19:23,566 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 [2021-10-24 09:19:24,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:19:24,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:19:24,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:19:24,582 INFO L354 Elim1Store]: treesize reduction 358, result has 7.3 percent of original size [2021-10-24 09:19:24,582 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 [2021-10-24 09:19:24,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:19:24,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:19:24,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:19:24,632 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-24 09:19:24,632 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 [2021-10-24 09:19:24,725 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 [2021-10-24 09:19:45,720 WARN L207 SmtUtils]: Spent 19.72 s on a formula simplification. DAG size of input: 122 DAG size of output: 36 [2021-10-24 09:19:45,721 INFO L354 Elim1Store]: treesize reduction 576, result has 9.3 percent of original size [2021-10-24 09:19:45,721 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 [2021-10-24 09:19:46,897 INFO L354 Elim1Store]: treesize reduction 475, result has 9.4 percent of original size [2021-10-24 09:19:46,898 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 [2021-10-24 09:19:46,912 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:19:46,915 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 458 [2021-10-24 09:19:46,922 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:19:46,924 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 495 [2021-10-24 09:19:46,931 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:19:46,933 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 544 [2021-10-24 09:19:47,272 INFO L354 Elim1Store]: treesize reduction 689, result has 12.3 percent of original size [2021-10-24 09:19:47,273 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 [2021-10-24 09:19:47,313 INFO L354 Elim1Store]: treesize reduction 129, result has 16.2 percent of original size [2021-10-24 09:19:47,314 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 [2021-10-24 09:19:47,314 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-24 09:19:48,123 INFO L354 Elim1Store]: treesize reduction 89, result has 4.3 percent of original size [2021-10-24 09:19:48,123 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 [2021-10-24 09:19:48,165 INFO L354 Elim1Store]: treesize reduction 92, result has 1.1 percent of original size [2021-10-24 09:19:48,166 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 [2021-10-24 09:19:48,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-10-24 09:19:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:19:48,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:19:48,531 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:19:48,532 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 960 [2021-10-24 09:19:48,537 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:19:48,539 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 974 [2021-10-24 09:19:48,543 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:19:48,544 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1022 [2021-10-24 09:19:48,548 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:19:48,550 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1070 [2021-10-24 09:19:48,554 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:19:48,560 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1181 [2021-10-24 09:19:50,972 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 [2021-10-24 09:20:19,736 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 [2021-10-24 09:20:21,836 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:20:23,581 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35792626 [2021-10-24 09:20:25,625 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:20:27,305 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52803282 [2021-10-24 09:20:34,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-24 09:20:34,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100134585] [2021-10-24 09:20:34,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:20:34,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 09:20:34,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:20:34,162 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 09:20:34,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-24 09:20:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:20:34,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-24 09:20:34,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:20:34,515 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-24 09:20:34,515 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 [2021-10-24 09:20:35,695 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-10-24 09:20:35,695 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 [2021-10-24 09:20:37,703 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-24 09:20:37,703 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 [2021-10-24 09:20:38,287 INFO L354 Elim1Store]: treesize reduction 12, result has 72.1 percent of original size [2021-10-24 09:20:38,287 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 [2021-10-24 09:20:39,807 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 [2021-10-24 09:20:39,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:20:39,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:20:39,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:20:39,959 INFO L354 Elim1Store]: treesize reduction 342, result has 5.8 percent of original size [2021-10-24 09:20:39,960 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 [2021-10-24 09:20:39,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:20:39,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:20:39,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 09:20:39,973 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 [2021-10-24 09:21:14,199 WARN L207 SmtUtils]: Spent 32.34 s on a formula simplification. DAG size of input: 177 DAG size of output: 44 [2021-10-24 09:21:14,199 INFO L354 Elim1Store]: treesize reduction 974, result has 6.3 percent of original size [2021-10-24 09:21:14,200 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 1003 treesize of output 485 [2021-10-24 09:21:15,354 INFO L354 Elim1Store]: treesize reduction 499, result has 9.3 percent of original size [2021-10-24 09:21:15,355 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 [2021-10-24 09:21:15,363 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:21:15,365 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 481 [2021-10-24 09:21:15,372 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:21:15,374 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 558 [2021-10-24 09:21:15,380 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:21:15,382 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 659 [2021-10-24 09:21:15,388 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:21:15,390 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 772 [2021-10-24 09:21:15,630 INFO L354 Elim1Store]: treesize reduction 861, result has 8.3 percent of original size [2021-10-24 09:21:15,630 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 [2021-10-24 09:21:15,640 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-24 09:21:16,423 INFO L354 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2021-10-24 09:21:16,423 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 [2021-10-24 09:21:16,455 INFO L354 Elim1Store]: treesize reduction 92, result has 1.1 percent of original size [2021-10-24 09:21:16,456 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 [2021-10-24 09:21:16,812 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 [2021-10-24 09:21:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:21:16,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:21:16,865 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:21:16,866 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 888 [2021-10-24 09:21:16,869 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:21:16,870 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 902 [2021-10-24 09:21:16,874 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:21:16,875 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 942 [2021-10-24 09:21:16,880 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:21:16,881 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 990 [2021-10-24 09:21:16,885 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:21:16,886 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1101 [2021-10-24 09:21:58,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 806864433 treesize of output 800704049 [2021-10-24 09:22:58,189 WARN L207 SmtUtils]: Spent 59.91 s on a formula simplification that was a NOOP. DAG size: 1750 [2021-10-24 09:23:57,720 WARN L207 SmtUtils]: Spent 59.38 s on a formula simplification that was a NOOP. DAG size: 1754 [2021-10-24 09:23:57,721 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:24:57,457 WARN L207 SmtUtils]: Spent 59.73 s on a formula simplification that was a NOOP. DAG size: 1736 [2021-10-24 09:25:56,702 WARN L207 SmtUtils]: Spent 59.24 s on a formula simplification that was a NOOP. DAG size: 1746 [2021-10-24 09:25:56,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1579289179 [2021-10-24 09:26:56,320 WARN L207 SmtUtils]: Spent 59.46 s on a formula simplification that was a NOOP. DAG size: 1746 [2021-10-24 09:27:55,343 WARN L207 SmtUtils]: Spent 58.86 s on a formula simplification that was a NOOP. DAG size: 1750 [2021-10-24 09:27:55,344 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 09:28:55,618 WARN L207 SmtUtils]: Spent 1.00 m on a formula simplification that was a NOOP. DAG size: 1742 [2021-10-24 09:29:55,340 WARN L207 SmtUtils]: Spent 59.72 s on a formula simplification that was a NOOP. DAG size: 1742 [2021-10-24 09:29:55,342 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2986056381 [2021-10-24 09:30:54,026 WARN L207 SmtUtils]: Spent 58.52 s on a formula simplification that was a NOOP. DAG size: 1742 [2021-10-24 09:30:54,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-24 09:30:54,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:30:54,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-24 09:30:54,084 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-24 09:30:54,084 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-24 09:30:54,091 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 09:30:54,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-24 09:30:54,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-24 09:30:54,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-10-24 09:30:54,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 09:30:54,718 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 09:30:54,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 09:30:54 BoogieIcfgContainer [2021-10-24 09:30:54,731 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 09:30:54,732 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 09:30:54,732 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 09:30:54,732 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 09:30:54,733 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:17:10" (3/4) ... [2021-10-24 09:30:54,736 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-24 09:30:54,736 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 09:30:54,737 INFO L168 Benchmark]: Toolchain (without parser) took 825900.90 ms. Allocated memory was 71.3 MB in the beginning and 612.4 MB in the end (delta: 541.1 MB). Free memory was 51.5 MB in the beginning and 390.2 MB in the end (delta: -338.7 MB). Peak memory consumption was 200.4 MB. Max. memory is 16.1 GB. [2021-10-24 09:30:54,737 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 71.3 MB. Free memory was 52.4 MB in the beginning and 52.3 MB in the end (delta: 53.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:30:54,737 INFO L168 Benchmark]: CACSL2BoogieTranslator took 603.63 ms. Allocated memory is still 71.3 MB. Free memory was 51.4 MB in the beginning and 45.4 MB in the end (delta: 6.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 09:30:54,738 INFO L168 Benchmark]: Boogie Procedure Inliner took 92.79 ms. Allocated memory is still 71.3 MB. Free memory was 45.4 MB in the beginning and 42.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:30:54,738 INFO L168 Benchmark]: Boogie Preprocessor took 83.10 ms. Allocated memory is still 71.3 MB. Free memory was 42.8 MB in the beginning and 40.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:30:54,739 INFO L168 Benchmark]: RCFGBuilder took 871.15 ms. Allocated memory is still 71.3 MB. Free memory was 40.7 MB in the beginning and 42.4 MB in the end (delta: -1.7 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. [2021-10-24 09:30:54,739 INFO L168 Benchmark]: TraceAbstraction took 824235.83 ms. Allocated memory was 71.3 MB in the beginning and 612.4 MB in the end (delta: 541.1 MB). Free memory was 42.1 MB in the beginning and 390.5 MB in the end (delta: -348.4 MB). Peak memory consumption was 368.8 MB. Max. memory is 16.1 GB. [2021-10-24 09:30:54,739 INFO L168 Benchmark]: Witness Printer took 3.69 ms. Allocated memory is still 612.4 MB. Free memory was 390.5 MB in the beginning and 390.2 MB in the end (delta: 286.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:30:54,742 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 71.3 MB. Free memory was 52.4 MB in the beginning and 52.3 MB in the end (delta: 53.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 603.63 ms. Allocated memory is still 71.3 MB. Free memory was 51.4 MB in the beginning and 45.4 MB in the end (delta: 6.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 92.79 ms. Allocated memory is still 71.3 MB. Free memory was 45.4 MB in the beginning and 42.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 83.10 ms. Allocated memory is still 71.3 MB. Free memory was 42.8 MB in the beginning and 40.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 871.15 ms. Allocated memory is still 71.3 MB. Free memory was 40.7 MB in the beginning and 42.4 MB in the end (delta: -1.7 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 824235.83 ms. Allocated memory was 71.3 MB in the beginning and 612.4 MB in the end (delta: 541.1 MB). Free memory was 42.1 MB in the beginning and 390.5 MB in the end (delta: -348.4 MB). Peak memory consumption was 368.8 MB. Max. memory is 16.1 GB. * Witness Printer took 3.69 ms. Allocated memory is still 612.4 MB. Free memory was 390.5 MB in the beginning and 390.2 MB in the end (delta: 286.1 kB). 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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: 824166.3ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 20.3ms, AutomataDifference: 6515.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 52 SDtfs, 143 SDslu, 92 SDs, 0 SdLazy, 139 SolverSat, 41 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 5773.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 3193.8ms Time, 0.0ms 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, 0.0ms DumpTime, AutomataMinimizationStatistics: 24.2ms AutomataMinimizationTime, 2 MinimizatonAttempts, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 50.4ms SsaConstructionTime, 208.4ms SatisfiabilityAnalysisTime, 3896.5ms InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 72 ConstructedInterpolants, 5 QuantifiedInterpolants, 389 SizeOfPredicates, 22 NumberOfNonLiveVariables, 221 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 2/2 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 [2021-10-24 09:30:54,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f079be2-c88f-4824-84cb-4e067fc468c0/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...