./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs --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 eb4dbd37bc5df2d32e4d07ff5e8c8ac6d224b822 ............................................................................................................................................................................................................................................................................................................................................................... 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_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs --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 eb4dbd37bc5df2d32e4d07ff5e8c8ac6d224b822 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:04:33,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:04:33,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:04:33,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:04:33,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:04:33,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:04:33,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:04:33,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:04:33,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:04:33,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:04:33,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:04:33,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:04:33,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:04:33,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:04:33,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:04:33,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:04:33,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:04:33,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:04:33,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:04:33,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:04:33,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:04:33,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:04:33,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:04:33,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:04:33,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:04:33,319 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:04:33,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:04:33,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:04:33,322 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:04:33,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:04:33,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:04:33,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:04:33,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:04:33,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:04:33,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:04:33,329 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:04:33,330 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:04:33,330 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:04:33,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:04:33,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:04:33,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:04:33,334 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 03:04:33,361 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:04:33,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:04:33,363 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:04:33,363 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:04:33,364 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:04:33,364 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:04:33,364 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 03:04:33,365 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:04:33,365 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:04:33,365 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 03:04:33,366 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 03:04:33,366 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:04:33,367 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 03:04:33,367 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 03:04:33,367 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 03:04:33,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:04:33,369 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:04:33,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:04:33,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:04:33,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:04:33,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:04:33,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:04:33,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:04:33,371 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:04:33,372 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:04:33,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:04:33,372 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:04:33,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:04:33,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:04:33,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:04:33,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:04:33,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:04:33,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:04:33,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:04:33,376 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 03:04:33,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 03:04:33,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:04:33,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:04:33,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:04:33,377 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_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb4dbd37bc5df2d32e4d07ff5e8c8ac6d224b822 [2021-10-16 03:04:33,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:04:33,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:04:33,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:04:33,672 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:04:33,672 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:04:33,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2021-10-16 03:04:33,750 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/data/4276cbd4a/82396be1ef554b4f9bc6eeae866eb9a7/FLAG2e39ea675 [2021-10-16 03:04:34,264 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:04:34,271 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2021-10-16 03:04:34,284 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/data/4276cbd4a/82396be1ef554b4f9bc6eeae866eb9a7/FLAG2e39ea675 [2021-10-16 03:04:34,571 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/data/4276cbd4a/82396be1ef554b4f9bc6eeae866eb9a7 [2021-10-16 03:04:34,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:04:34,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:04:34,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:04:34,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:04:34,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:04:34,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:04:34" (1/1) ... [2021-10-16 03:04:34,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6baf1437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:34, skipping insertion in model container [2021-10-16 03:04:34,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:04:34" (1/1) ... [2021-10-16 03:04:34,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:04:34,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:04:34,948 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_74e4116a-7f9d-41da-a958-61f13526fefd/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i[24076,24089] [2021-10-16 03:04:34,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:04:34,959 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:04:35,020 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_74e4116a-7f9d-41da-a958-61f13526fefd/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i[24076,24089] [2021-10-16 03:04:35,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:04:35,050 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:04:35,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:35 WrapperNode [2021-10-16 03:04:35,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:04:35,052 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:04:35,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:04:35,053 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:04:35,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:35" (1/1) ... [2021-10-16 03:04:35,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:35" (1/1) ... [2021-10-16 03:04:35,127 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:04:35,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:04:35,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:04:35,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:04:35,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:35" (1/1) ... [2021-10-16 03:04:35,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:35" (1/1) ... [2021-10-16 03:04:35,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:35" (1/1) ... [2021-10-16 03:04:35,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:35" (1/1) ... [2021-10-16 03:04:35,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:35" (1/1) ... [2021-10-16 03:04:35,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:35" (1/1) ... [2021-10-16 03:04:35,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:35" (1/1) ... [2021-10-16 03:04:35,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:04:35,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:04:35,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:04:35,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:04:35,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:35" (1/1) ... [2021-10-16 03:04:35,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:04:35,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:04:35,222 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:04:35,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:04:35,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 03:04:35,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 03:04:35,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 03:04:35,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 03:04:35,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:04:35,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 03:04:35,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 03:04:35,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-16 03:04:35,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 03:04:35,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:04:35,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:04:35,966 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:04:35,967 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-16 03:04:35,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:04:35 BoogieIcfgContainer [2021-10-16 03:04:35,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:04:35,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:04:35,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:04:35,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:04:35,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:04:34" (1/3) ... [2021-10-16 03:04:35,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0a877f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:04:35, skipping insertion in model container [2021-10-16 03:04:35,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:35" (2/3) ... [2021-10-16 03:04:35,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0a877f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:04:35, skipping insertion in model container [2021-10-16 03:04:35,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:04:35" (3/3) ... [2021-10-16 03:04:35,980 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_equal.i [2021-10-16 03:04:35,989 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:04:35,989 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 03:04:36,042 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:04:36,049 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, mConcurrency=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 [2021-10-16 03:04:36,049 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 03:04:36,065 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:04:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 03:04:36,072 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:36,074 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 03:04:36,075 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:36,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:36,090 INFO L82 PathProgramCache]: Analyzing trace with hash -767157671, now seen corresponding path program 1 times [2021-10-16 03:04:36,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:36,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994354199] [2021-10-16 03:04:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:36,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:36,358 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:36,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994354199] [2021-10-16 03:04:36,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994354199] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:36,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:36,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:04:36,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265895125] [2021-10-16 03:04:36,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:04:36,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:04:36,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:04:36,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:36,388 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:04:36,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:36,428 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2021-10-16 03:04:36,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:04:36,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 03:04:36,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:36,444 INFO L225 Difference]: With dead ends: 27 [2021-10-16 03:04:36,444 INFO L226 Difference]: Without dead ends: 11 [2021-10-16 03:04:36,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:04:36,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-16 03:04:36,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-10-16 03:04:36,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:04:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-10-16 03:04:36,480 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2021-10-16 03:04:36,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:36,480 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-16 03:04:36,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:04:36,481 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-10-16 03:04:36,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 03:04:36,482 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:36,482 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:36,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 03:04:36,483 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:36,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:36,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1666509160, now seen corresponding path program 1 times [2021-10-16 03:04:36,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:04:36,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054350715] [2021-10-16 03:04:36,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:36,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:04:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:36,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:04:36,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054350715] [2021-10-16 03:04:36,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054350715] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 03:04:36,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422297689] [2021-10-16 03:04:36,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:36,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:04:36,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:04:36,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:04:36,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 03:04:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:36,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 03:04:36,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:36,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:36,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422297689] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:04:36,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1977444036] [2021-10-16 03:04:36,955 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-16 03:04:36,955 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 03:04:36,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 03:04:36,965 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 03:04:36,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 03:04:36,994 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:37,001 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:04:37,002 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:37,003 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 03:04:37,004 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:04:37,005 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:37,005 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 03:04:37,011 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-10-16 03:04:37,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:37,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:37,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:04:37,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-16 03:04:37,060 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:37,061 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 03:04:37,062 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:37,063 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 03:04:37,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 03:04:37,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:04:37,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:37,096 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:37,099 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-10-16 03:04:37,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 03:04:37,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:140, output treesize:143 [2021-10-16 03:04:37,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:04:37,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:04:37,328 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_37| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) 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:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) 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) [2021-10-16 03:04:37,332 INFO L168 Benchmark]: Toolchain (without parser) took 2755.01 ms. Allocated memory was 136.3 MB in the beginning and 186.6 MB in the end (delta: 50.3 MB). Free memory was 94.4 MB in the beginning and 139.3 MB in the end (delta: -45.0 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:37,332 INFO L168 Benchmark]: CDTParser took 0.70 ms. Allocated memory is still 136.3 MB. Free memory is still 112.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:04:37,333 INFO L168 Benchmark]: CACSL2BoogieTranslator took 462.59 ms. Allocated memory is still 136.3 MB. Free memory was 94.2 MB in the beginning and 103.0 MB in the end (delta: -8.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:37,333 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.87 ms. Allocated memory is still 136.3 MB. Free memory was 102.6 MB in the beginning and 100.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:37,334 INFO L168 Benchmark]: Boogie Preprocessor took 61.28 ms. Allocated memory is still 136.3 MB. Free memory was 100.9 MB in the beginning and 99.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:37,335 INFO L168 Benchmark]: RCFGBuilder took 780.42 ms. Allocated memory is still 136.3 MB. Free memory was 99.2 MB in the beginning and 78.2 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-16 03:04:37,335 INFO L168 Benchmark]: TraceAbstraction took 1358.04 ms. Allocated memory was 136.3 MB in the beginning and 186.6 MB in the end (delta: 50.3 MB). Free memory was 77.8 MB in the beginning and 139.3 MB in the end (delta: -61.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:04:37,339 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 ms. Allocated memory is still 136.3 MB. Free memory is still 112.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 462.59 ms. Allocated memory is still 136.3 MB. Free memory was 94.2 MB in the beginning and 103.0 MB in the end (delta: -8.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.87 ms. Allocated memory is still 136.3 MB. Free memory was 102.6 MB in the beginning and 100.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.28 ms. Allocated memory is still 136.3 MB. Free memory was 100.9 MB in the beginning and 99.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 780.42 ms. Allocated memory is still 136.3 MB. Free memory was 99.2 MB in the beginning and 78.2 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1358.04 ms. Allocated memory was 136.3 MB in the beginning and 186.6 MB in the end (delta: 50.3 MB). Free memory was 77.8 MB in the beginning and 139.3 MB in the end (delta: -61.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_37| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_37|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 03:04:37,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/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-5709675 [2021-10-16 03:04:39,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:04:39,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:04:39,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:04:39,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:04:39,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:04:39,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:04:39,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:04:39,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:04:40,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:04:40,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:04:40,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:04:40,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:04:40,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:04:40,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:04:40,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:04:40,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:04:40,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:04:40,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:04:40,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:04:40,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:04:40,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:04:40,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:04:40,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:04:40,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:04:40,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:04:40,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:04:40,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:04:40,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:04:40,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:04:40,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:04:40,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:04:40,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:04:40,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:04:40,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:04:40,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:04:40,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:04:40,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:04:40,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:04:40,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:04:40,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:04:40,064 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 03:04:40,112 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:04:40,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:04:40,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:04:40,114 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:04:40,114 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:04:40,114 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:04:40,115 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:04:40,115 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:04:40,116 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:04:40,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:04:40,119 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:04:40,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:04:40,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:04:40,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:04:40,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:04:40,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:04:40,121 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:04:40,121 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 03:04:40,121 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 03:04:40,121 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:04:40,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:04:40,122 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:04:40,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:04:40,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:04:40,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 03:04:40,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:04:40,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:04:40,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:04:40,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:04:40,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:04:40,124 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 03:04:40,124 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 03:04:40,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:04:40,125 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:04:40,125 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:04:40,125 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_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb4dbd37bc5df2d32e4d07ff5e8c8ac6d224b822 [2021-10-16 03:04:40,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:04:40,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:04:40,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:04:40,541 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:04:40,542 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:04:40,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2021-10-16 03:04:40,632 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/data/3d2be61e2/2e0a37daa51342c4bbaeb5e8905c4a58/FLAGdaf6b27ed [2021-10-16 03:04:41,208 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:04:41,209 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2021-10-16 03:04:41,226 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/data/3d2be61e2/2e0a37daa51342c4bbaeb5e8905c4a58/FLAGdaf6b27ed [2021-10-16 03:04:41,485 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/data/3d2be61e2/2e0a37daa51342c4bbaeb5e8905c4a58 [2021-10-16 03:04:41,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:04:41,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:04:41,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:04:41,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:04:41,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:04:41,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:04:41" (1/1) ... [2021-10-16 03:04:41,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f0447c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:41, skipping insertion in model container [2021-10-16 03:04:41,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:04:41" (1/1) ... [2021-10-16 03:04:41,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:04:41,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:04:41,903 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_74e4116a-7f9d-41da-a958-61f13526fefd/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i[24076,24089] [2021-10-16 03:04:41,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:04:41,919 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:04:41,961 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_74e4116a-7f9d-41da-a958-61f13526fefd/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i[24076,24089] [2021-10-16 03:04:41,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:04:41,993 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:04:41,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:41 WrapperNode [2021-10-16 03:04:41,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:04:41,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:04:41,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:04:41,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:04:42,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:41" (1/1) ... [2021-10-16 03:04:42,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:41" (1/1) ... [2021-10-16 03:04:42,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:04:42,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:04:42,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:04:42,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:04:42,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:41" (1/1) ... [2021-10-16 03:04:42,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:41" (1/1) ... [2021-10-16 03:04:42,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:41" (1/1) ... [2021-10-16 03:04:42,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:41" (1/1) ... [2021-10-16 03:04:42,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:41" (1/1) ... [2021-10-16 03:04:42,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:41" (1/1) ... [2021-10-16 03:04:42,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:41" (1/1) ... [2021-10-16 03:04:42,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:04:42,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:04:42,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:04:42,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:04:42,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:41" (1/1) ... [2021-10-16 03:04:42,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:04:42,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:04:42,153 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:04:42,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:04:42,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 03:04:42,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 03:04:42,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 03:04:42,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:04:42,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 03:04:42,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 03:04:42,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 03:04:42,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-16 03:04:42,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 03:04:42,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:04:42,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:04:42,759 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:04:42,759 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-16 03:04:42,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:04:42 BoogieIcfgContainer [2021-10-16 03:04:42,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:04:42,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:04:42,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:04:42,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:04:42,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:04:41" (1/3) ... [2021-10-16 03:04:42,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69284ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:04:42, skipping insertion in model container [2021-10-16 03:04:42,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:04:41" (2/3) ... [2021-10-16 03:04:42,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69284ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:04:42, skipping insertion in model container [2021-10-16 03:04:42,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:04:42" (3/3) ... [2021-10-16 03:04:42,774 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_equal.i [2021-10-16 03:04:42,780 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:04:42,780 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 03:04:42,848 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:04:42,857 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, mConcurrency=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 [2021-10-16 03:04:42,858 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 03:04:42,876 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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) [2021-10-16 03:04:42,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 03:04:42,899 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:42,899 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:42,900 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:42,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:42,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1326451473, now seen corresponding path program 1 times [2021-10-16 03:04:42,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:04:42,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625176610] [2021-10-16 03:04:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:42,923 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:04:42,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:04:42,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:04:42,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 03:04:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:43,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 03:04:43,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:43,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:43,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:04:43,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625176610] [2021-10-16 03:04:43,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625176610] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:43,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:43,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 03:04:43,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263961763] [2021-10-16 03:04:43,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 03:04:43,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:04:43,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 03:04:43,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:04:43,286 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:04:43,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:43,304 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-10-16 03:04:43,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 03:04:43,305 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 03:04:43,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:43,313 INFO L225 Difference]: With dead ends: 42 [2021-10-16 03:04:43,313 INFO L226 Difference]: Without dead ends: 18 [2021-10-16 03:04:43,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:04:43,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-16 03:04:43,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-16 03:04:43,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:04:43,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-10-16 03:04:43,351 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2021-10-16 03:04:43,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:43,351 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-10-16 03:04:43,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:04:43,352 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-10-16 03:04:43,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 03:04:43,353 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:43,353 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:43,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:04:43,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:04:43,568 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:43,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:43,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1817764607, now seen corresponding path program 1 times [2021-10-16 03:04:43,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:04:43,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587793649] [2021-10-16 03:04:43,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:43,574 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:04:43,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:04:43,577 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:04:43,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 03:04:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:43,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 03:04:43,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:43,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:04:43,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:04:43,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587793649] [2021-10-16 03:04:43,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587793649] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:04:43,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:04:43,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 03:04:43,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936965007] [2021-10-16 03:04:43,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:04:43,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:04:43,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:04:43,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:04:43,803 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2021-10-16 03:04:43,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:04:43,827 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-10-16 03:04:43,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:04:43,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) Word has length 12 [2021-10-16 03:04:43,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:04:43,829 INFO L225 Difference]: With dead ends: 35 [2021-10-16 03:04:43,829 INFO L226 Difference]: Without dead ends: 24 [2021-10-16 03:04:43,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:04:43,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-16 03:04:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-16 03:04:43,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:04:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-10-16 03:04:43,836 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 12 [2021-10-16 03:04:43,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:04:43,836 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-10-16 03:04:43,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2021-10-16 03:04:43,837 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-10-16 03:04:43,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 03:04:43,838 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:04:43,838 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:04:43,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 03:04:44,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:04:44,052 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:04:44,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:04:44,052 INFO L82 PathProgramCache]: Analyzing trace with hash -341425153, now seen corresponding path program 1 times [2021-10-16 03:04:44,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:04:44,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682229122] [2021-10-16 03:04:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:04:44,053 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:04:44,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:04:44,054 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:04:44,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 03:04:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:04:44,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-16 03:04:44,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:04:44,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:04:44,927 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 03:04:44,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 93 [2021-10-16 03:04:44,995 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-16 03:04:44,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 82 [2021-10-16 03:04:45,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 47 [2021-10-16 03:04:45,050 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-10-16 03:04:45,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 32 [2021-10-16 03:04:45,145 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 43 treesize of output 31 [2021-10-16 03:04:45,151 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 28 treesize of output 20 [2021-10-16 03:04:45,244 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 24 treesize of output 16 [2021-10-16 03:04:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-16 03:04:45,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:04:45,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:45,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 290 treesize of output 293 [2021-10-16 03:04:45,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:45,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 961 treesize of output 908 [2021-10-16 03:04:45,634 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:45,676 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1148 [2021-10-16 03:04:45,715 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:04:45,750 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1768 [2021-10-16 03:05:04,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:05:04,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1044 treesize of output 1039 [2021-10-16 03:05:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-16 03:05:09,624 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:05:09,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682229122] [2021-10-16 03:05:09,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682229122] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:05:09,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:05:09,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-10-16 03:05:09,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974790728] [2021-10-16 03:05:09,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 03:05:09,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:05:09,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 03:05:09,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-10-16 03:05:09,627 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 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) [2021-10-16 03:05:10,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:05:10,893 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-10-16 03:05:10,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 03:05:10,895 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 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 [2021-10-16 03:05:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:05:10,896 INFO L225 Difference]: With dead ends: 31 [2021-10-16 03:05:10,896 INFO L226 Difference]: Without dead ends: 29 [2021-10-16 03:05:10,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1051.2ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-10-16 03:05:10,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-16 03:05:10,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-10-16 03:05:10,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:05:10,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-10-16 03:05:10,904 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 22 [2021-10-16 03:05:10,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:05:10,905 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-10-16 03:05:10,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 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) [2021-10-16 03:05:10,905 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-10-16 03:05:10,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 03:05:10,906 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:05:10,906 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:05:10,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 03:05:11,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:05:11,125 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:05:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:05:11,125 INFO L82 PathProgramCache]: Analyzing trace with hash -341426827, now seen corresponding path program 1 times [2021-10-16 03:05:11,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:05:11,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038840136] [2021-10-16 03:05:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:05:11,126 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:05:11,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:05:11,136 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:05:11,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 03:05:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:05:11,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 03:05:11,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:05:11,476 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-10-16 03:05:11,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2021-10-16 03:05:11,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-10-16 03:05:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-16 03:05:11,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:05:11,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:05:11,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 186 [2021-10-16 03:05:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-16 03:05:11,724 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:05:11,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038840136] [2021-10-16 03:05:11,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038840136] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:05:11,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:05:11,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-10-16 03:05:11,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635918082] [2021-10-16 03:05:11,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 03:05:11,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:05:11,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 03:05:11,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:05:11,727 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-10-16 03:05:11,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:05:11,977 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-10-16 03:05:11,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 03:05:11,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) Word has length 22 [2021-10-16 03:05:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:05:11,981 INFO L225 Difference]: With dead ends: 29 [2021-10-16 03:05:11,981 INFO L226 Difference]: Without dead ends: 26 [2021-10-16 03:05:11,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-16 03:05:11,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-16 03:05:11,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-16 03:05:11,986 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) [2021-10-16 03:05:11,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-10-16 03:05:11,986 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2021-10-16 03:05:11,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:05:11,987 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-16 03:05:11,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-10-16 03:05:11,987 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-10-16 03:05:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 03:05:11,988 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:05:11,988 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:05:12,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 03:05:12,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:05:12,189 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:05:12,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:05:12,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1692023174, now seen corresponding path program 1 times [2021-10-16 03:05:12,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:05:12,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126904269] [2021-10-16 03:05:12,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:05:12,190 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:05:12,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:05:12,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:05:12,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 03:05:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:05:12,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-16 03:05:12,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:05:12,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:05:12,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:05:12,745 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 [2021-10-16 03:05:12,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:05:12,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-16 03:05:12,968 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-16 03:05:12,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-10-16 03:05:13,146 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:05:13,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-10-16 03:05:13,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:05:13,181 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-16 03:05:13,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 72 [2021-10-16 03:05:13,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:05:13,234 INFO L354 Elim1Store]: treesize reduction 63, result has 10.0 percent of original size [2021-10-16 03:05:13,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2021-10-16 03:05:13,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:05:13,309 INFO L354 Elim1Store]: treesize reduction 55, result has 21.4 percent of original size [2021-10-16 03:05:13,310 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 1 case distinctions, treesize of input 28 treesize of output 28 [2021-10-16 03:05:13,717 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-16 03:05:13,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 125 [2021-10-16 03:05:13,798 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-16 03:05:13,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 82 [2021-10-16 03:05:13,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 89 [2021-10-16 03:05:13,852 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-10-16 03:05:13,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 74 [2021-10-16 03:05:14,267 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-16 03:05:14,268 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 57 [2021-10-16 03:05:14,298 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-16 03:05:14,298 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 38 [2021-10-16 03:05:14,633 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 [2021-10-16 03:05:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:05:14,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:05:15,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:05:15,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 280 [2021-10-16 03:05:15,042 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:05:15,042 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 279 [2021-10-16 03:05:15,909 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:05:15,910 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 338 [2021-10-16 03:05:15,913 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:05:15,914 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 443 [2021-10-16 03:05:15,916 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:05:15,917 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 547 [2021-10-16 03:05:43,500 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 668 treesize of output 660 [2021-10-16 03:09:00,355 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:09:00,357 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 764 [2021-10-16 03:09:00,368 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 2778 treesize of output 2762 [2021-10-16 03:10:48,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:10:48,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11337370 treesize of output 11304549 [2021-10-16 03:11:41,289 WARN L207 SmtUtils]: Spent 53.09 s on a formula simplification that was a NOOP. DAG size: 3490 [2021-10-16 03:11:41,661 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:11:41,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126904269] [2021-10-16 03:11:41,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 03:11:41,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1846462317] [2021-10-16 03:11:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:41,662 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:11:41,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:11:41,668 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:11:41,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-16 03:11:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:42,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-16 03:11:42,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:42,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:11:42,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:11:43,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:11:43,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-16 03:11:43,962 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-16 03:11:43,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-16 03:11:44,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:11:44,374 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-10-16 03:11:44,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-10-16 03:11:44,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:11:44,447 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-16 03:11:44,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 67 [2021-10-16 03:11:44,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:11:44,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2021-10-16 03:11:44,483 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-16 03:11:44,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 52 [2021-10-16 03:11:45,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:45,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 125 [2021-10-16 03:11:45,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:45,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 82 [2021-10-16 03:11:45,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 89 [2021-10-16 03:11:45,109 INFO L354 Elim1Store]: treesize reduction 45, result has 25.0 percent of original size [2021-10-16 03:11:45,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 74 [2021-10-16 03:11:45,947 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-16 03:11:45,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 57 [2021-10-16 03:11:45,966 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-10-16 03:11:45,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 38 [2021-10-16 03:11:46,164 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 [2021-10-16 03:11:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:11:46,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:46,218 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:46,219 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 280 [2021-10-16 03:11:46,222 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:46,223 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 279 [2021-10-16 03:11:47,209 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:47,210 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 338 [2021-10-16 03:11:47,214 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:47,214 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 443 [2021-10-16 03:11:47,217 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:47,218 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 547 [2021-10-16 03:11:49,352 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_node_create_~data (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (= (let ((.cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse5 (let ((.cse8 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse9 (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_14))) (store .cse9 .cse1 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base .cse9) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse8 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse8 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.offset)))) (.cse2 (let ((.cse6 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse7 (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_13))) (store .cse7 .cse1 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base .cse7) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse6 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.base))))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)) (.cse4 (bvadd (_ bv4 32) (select (select .cse5 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)))) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base (store (store (store (select |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 v_DerPreprocessor_12) c_ULTIMATE.start_node_create_~temp~0.offset ULTIMATE.start_node_create_~data) .cse1 v_DerPreprocessor_5)))) (store .cse0 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse0 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset v_DerPreprocessor_4))) (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4))))) c_ULTIMATE.start_main_~data~0)) is different from false [2021-10-16 03:11:49,525 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 1195 treesize of output 1183 [2021-10-16 03:11:49,538 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 2781 treesize of output 2741 [2021-10-16 03:12:34,866 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:12:34,882 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 295 [2021-10-16 03:12:53,948 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 6762 treesize of output 6746 [2021-10-16 03:12:53,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 03:12:53,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722570333] [2021-10-16 03:12:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:53,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:12:53,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:12:53,986 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:12:53,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-16 03:12:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:54,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-16 03:12:54,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:12:54,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:12:54,693 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 03:12:54,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-10-16 03:12:55,259 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-10-16 03:12:55,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 58 [2021-10-16 03:12:55,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 03:12:56,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:12:56,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-16 03:12:57,755 INFO L354 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2021-10-16 03:12:57,755 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 74 treesize of output 78 [2021-10-16 03:12:58,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:12:58,754 INFO L354 Elim1Store]: treesize reduction 46, result has 34.3 percent of original size [2021-10-16 03:12:58,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 79 [2021-10-16 03:12:58,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:12:58,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2021-10-16 03:12:58,789 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-16 03:12:58,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 59 [2021-10-16 03:12:58,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:12:58,950 INFO L354 Elim1Store]: treesize reduction 55, result has 21.4 percent of original size [2021-10-16 03:12:58,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-10-16 03:12:59,985 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-16 03:12:59,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 165 treesize of output 136 [2021-10-16 03:13:00,041 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-10-16 03:13:00,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 175 treesize of output 130 [2021-10-16 03:13:00,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 100 [2021-10-16 03:13:00,074 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-16 03:13:00,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 85 [2021-10-16 03:13:01,495 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-16 03:13:01,495 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 58 [2021-10-16 03:13:01,525 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-16 03:13:01,525 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 39 [2021-10-16 03:13:02,394 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 [2021-10-16 03:13:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:13:02,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:13:02,443 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:13:02,444 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 280 [2021-10-16 03:13:02,446 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:13:02,447 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 279 [2021-10-16 03:13:03,492 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:13:03,493 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 338 [2021-10-16 03:13:03,495 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:13:03,496 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 443 [2021-10-16 03:13:03,498 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:13:03,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 547 [2021-10-16 03:13:05,655 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (ULTIMATE.start_node_create_~data (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_18 (_ BitVec 32))) (= (let ((.cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse5 (let ((.cse8 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse9 (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_20))) (store .cse9 .cse1 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base .cse9) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse8 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse8 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.offset)))) (.cse2 (let ((.cse6 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse7 (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_19))) (store .cse7 .cse1 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base .cse7) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse6 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.base))))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)) (.cse4 (bvadd (_ bv4 32) (select (select .cse5 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)))) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base (store (store (store (select |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 v_DerPreprocessor_18) c_ULTIMATE.start_node_create_~temp~0.offset ULTIMATE.start_node_create_~data) .cse1 v_DerPreprocessor_5)))) (store .cse0 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse0 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset v_DerPreprocessor_4))) (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4))))) c_ULTIMATE.start_main_~data~0)) is different from false [2021-10-16 03:13:05,861 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 1195 treesize of output 1183 [2021-10-16 03:13:05,874 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 5013 treesize of output 4937 [2021-10-16 03:13:05,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 03:13:05,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:13:05,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-16 03:13:05,902 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-16 03:13:05,903 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-16 03:13:05,909 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:13:05,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-16 03:13:06,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-16 03:13:06,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-16 03:13:06,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:13:06,519 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:13:06,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:13:06 BoogieIcfgContainer [2021-10-16 03:13:06,536 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:13:06,537 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:13:06,537 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:13:06,537 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:13:06,537 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:04:42" (3/4) ... [2021-10-16 03:13:06,540 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 03:13:06,541 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:13:06,542 INFO L168 Benchmark]: Toolchain (without parser) took 505052.42 ms. Allocated memory was 60.8 MB in the beginning and 325.1 MB in the end (delta: 264.2 MB). Free memory was 38.6 MB in the beginning and 146.9 MB in the end (delta: -108.2 MB). Peak memory consumption was 155.9 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:06,542 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 60.8 MB. Free memory is still 41.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:13:06,542 INFO L168 Benchmark]: CACSL2BoogieTranslator took 504.32 ms. Allocated memory is still 60.8 MB. Free memory was 38.4 MB in the beginning and 35.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:06,543 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.44 ms. Allocated memory is still 60.8 MB. Free memory was 35.1 MB in the beginning and 33.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:06,543 INFO L168 Benchmark]: Boogie Preprocessor took 68.81 ms. Allocated memory is still 60.8 MB. Free memory was 33.0 MB in the beginning and 31.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:06,544 INFO L168 Benchmark]: RCFGBuilder took 646.66 ms. Allocated memory was 60.8 MB in the beginning and 81.8 MB in the end (delta: 21.0 MB). Free memory was 31.1 MB in the beginning and 54.5 MB in the end (delta: -23.4 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:06,544 INFO L168 Benchmark]: TraceAbstraction took 503772.48 ms. Allocated memory was 81.8 MB in the beginning and 325.1 MB in the end (delta: 243.3 MB). Free memory was 53.8 MB in the beginning and 148.1 MB in the end (delta: -94.3 MB). Peak memory consumption was 148.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:06,544 INFO L168 Benchmark]: Witness Printer took 4.32 ms. Allocated memory is still 325.1 MB. Free memory was 148.1 MB in the beginning and 146.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:13:06,547 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 60.8 MB. Free memory is still 41.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 504.32 ms. Allocated memory is still 60.8 MB. Free memory was 38.4 MB in the beginning and 35.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.44 ms. Allocated memory is still 60.8 MB. Free memory was 35.1 MB in the beginning and 33.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 68.81 ms. Allocated memory is still 60.8 MB. Free memory was 33.0 MB in the beginning and 31.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 646.66 ms. Allocated memory was 60.8 MB in the beginning and 81.8 MB in the end (delta: 21.0 MB). Free memory was 31.1 MB in the beginning and 54.5 MB in the end (delta: -23.4 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 503772.48 ms. Allocated memory was 81.8 MB in the beginning and 325.1 MB in the end (delta: 243.3 MB). Free memory was 53.8 MB in the beginning and 148.1 MB in the end (delta: -94.3 MB). Peak memory consumption was 148.1 MB. Max. memory is 16.1 GB. * Witness Printer took 4.32 ms. Allocated memory is still 325.1 MB. Free memory was 148.1 MB in the beginning and 146.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. 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: 624]: 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: [L605] const int len = 2; [L606] const int data = 1; [L607] SLL s = sll_create(len, data); [L584] SLL head = ((void *)0); [L585] COND TRUE len > 0 [L575] SLL temp = (SLL) malloc(sizeof(struct node)); [L576] COND FALSE !(((void *)0) == temp) [L579] temp->next = ((void *)0) [L580] temp->data = data [L581] return temp; [L586] SLL new_head = node_create(data); [L587] new_head->next = head [L588] head = new_head [L585] len-- [L585] COND TRUE len > 0 [L575] SLL temp = (SLL) malloc(sizeof(struct node)); [L576] COND FALSE !(((void *)0) == temp) [L579] temp->next = ((void *)0) [L580] temp->data = data [L581] return temp; [L586] SLL new_head = node_create(data); [L587] new_head->next = head [L588] head = new_head [L585] len-- [L585] COND FALSE !(len > 0) [L590] return head; [L607] SLL s = sll_create(len, data); [L575] SLL temp = (SLL) malloc(sizeof(struct node)); [L576] COND FALSE !(((void *)0) == temp) [L579] temp->next = ((void *)0) [L580] temp->data = data [L581] return temp; [L600] SLL new_head = node_create(data); [L601] EXPR \read(*head) [L601] new_head->next = *head [L602] *head = new_head [L609] EXPR \read(s) [L609] SLL ptr = s; [L610] int count = 0; [L611] COND TRUE \read(ptr) [L612] EXPR ptr->next [L612] SLL temp = ptr->next; [L613] EXPR ptr->data [L613] COND FALSE !(data != ptr->data) [L616] ptr = temp [L617] count++ [L611] COND TRUE \read(ptr) [L612] EXPR ptr->next [L612] SLL temp = ptr->next; [L613] EXPR ptr->data [L613] COND TRUE data != ptr->data [L624] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 503671.8ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 31.2ms, AutomataDifference: 1618.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 73 SDtfs, 95 SDslu, 107 SDs, 0 SdLazy, 120 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 889.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 136 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1167.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=3, InterpolantAutomatonStates: 20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 37.0ms AutomataMinimizationTime, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 81.1ms SsaConstructionTime, 281.5ms SatisfiabilityAnalysisTime, 26035.5ms InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 128 ConstructedInterpolants, 6 QuantifiedInterpolants, 743 SizeOfPredicates, 41 NumberOfNonLiveVariables, 386 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 28/28 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 [2021-10-16 03:13:06,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e4116a-7f9d-41da-a958-61f13526fefd/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...