./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test23-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test23-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan --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 b5a3ee374ac0f96e3c60321b5f69e75eb8e7b4b2 .................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test23-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan --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 b5a3ee374ac0f96e3c60321b5f69e75eb8e7b4b2 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@f3cc1f5 --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 16:42:21,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 16:42:21,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 16:42:21,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 16:42:21,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 16:42:21,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 16:42:21,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 16:42:21,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 16:42:21,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 16:42:21,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 16:42:21,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 16:42:21,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 16:42:21,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 16:42:21,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 16:42:21,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 16:42:21,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 16:42:21,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 16:42:21,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 16:42:21,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 16:42:21,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 16:42:21,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 16:42:21,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 16:42:21,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 16:42:21,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 16:42:21,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 16:42:21,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 16:42:21,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 16:42:21,410 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 16:42:21,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 16:42:21,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 16:42:21,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 16:42:21,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 16:42:21,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 16:42:21,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 16:42:21,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 16:42:21,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 16:42:21,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 16:42:21,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 16:42:21,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 16:42:21,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 16:42:21,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 16:42:21,419 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 16:42:21,442 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 16:42:21,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 16:42:21,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 16:42:21,443 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 16:42:21,443 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 16:42:21,443 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 16:42:21,444 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 16:42:21,444 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 16:42:21,444 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 16:42:21,444 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 16:42:21,444 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 16:42:21,444 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 16:42:21,445 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 16:42:21,445 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 16:42:21,445 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 16:42:21,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 16:42:21,446 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 16:42:21,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 16:42:21,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 16:42:21,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 16:42:21,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 16:42:21,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 16:42:21,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 16:42:21,447 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 16:42:21,447 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 16:42:21,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 16:42:21,447 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 16:42:21,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 16:42:21,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 16:42:21,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 16:42:21,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:42:21,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 16:42:21,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 16:42:21,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 16:42:21,449 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 16:42:21,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 16:42:21,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 16:42:21,449 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 16:42:21,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 16:42:21,450 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-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5a3ee374ac0f96e3c60321b5f69e75eb8e7b4b2 [2020-12-09 16:42:21,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 16:42:21,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 16:42:21,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 16:42:21,662 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 16:42:21,662 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 16:42:21,663 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/../../sv-benchmarks/c/ldv-regression/test23-2.c [2020-12-09 16:42:21,702 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/data/4fccdcc2b/93669aa04d494ac3b3165c853f485b8a/FLAGc5b20f6f1 [2020-12-09 16:42:22,014 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 16:42:22,014 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/sv-benchmarks/c/ldv-regression/test23-2.c [2020-12-09 16:42:22,019 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/data/4fccdcc2b/93669aa04d494ac3b3165c853f485b8a/FLAGc5b20f6f1 [2020-12-09 16:42:22,428 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/data/4fccdcc2b/93669aa04d494ac3b3165c853f485b8a [2020-12-09 16:42:22,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 16:42:22,432 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 16:42:22,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 16:42:22,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 16:42:22,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 16:42:22,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:42:22" (1/1) ... [2020-12-09 16:42:22,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fa64cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:22, skipping insertion in model container [2020-12-09 16:42:22,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:42:22" (1/1) ... [2020-12-09 16:42:22,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 16:42:22,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:42:22,561 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/sv-benchmarks/c/ldv-regression/test23-2.c[1070,1083] [2020-12-09 16:42:22,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:42:22,572 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 16:42:22,584 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/sv-benchmarks/c/ldv-regression/test23-2.c[1070,1083] [2020-12-09 16:42:22,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:42:22,599 INFO L208 MainTranslator]: Completed translation [2020-12-09 16:42:22,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:22 WrapperNode [2020-12-09 16:42:22,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 16:42:22,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 16:42:22,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 16:42:22,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 16:42:22,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:22" (1/1) ... [2020-12-09 16:42:22,615 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:22" (1/1) ... [2020-12-09 16:42:22,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 16:42:22,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 16:42:22,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 16:42:22,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 16:42:22,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:22" (1/1) ... [2020-12-09 16:42:22,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:22" (1/1) ... [2020-12-09 16:42:22,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:22" (1/1) ... [2020-12-09 16:42:22,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:22" (1/1) ... [2020-12-09 16:42:22,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:22" (1/1) ... [2020-12-09 16:42:22,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:22" (1/1) ... [2020-12-09 16:42:22,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:22" (1/1) ... [2020-12-09 16:42:22,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 16:42:22,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 16:42:22,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 16:42:22,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 16:42:22,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:42:22,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 16:42:22,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 16:42:22,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 16:42:22,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 16:42:22,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 16:42:22,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 16:42:23,055 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 16:42:23,056 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-09 16:42:23,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:42:23 BoogieIcfgContainer [2020-12-09 16:42:23,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 16:42:23,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 16:42:23,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 16:42:23,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 16:42:23,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:42:22" (1/3) ... [2020-12-09 16:42:23,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75496975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:42:23, skipping insertion in model container [2020-12-09 16:42:23,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:22" (2/3) ... [2020-12-09 16:42:23,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75496975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:42:23, skipping insertion in model container [2020-12-09 16:42:23,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:42:23" (3/3) ... [2020-12-09 16:42:23,066 INFO L111 eAbstractionObserver]: Analyzing ICFG test23-2.c [2020-12-09 16:42:23,079 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 16:42:23,082 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 16:42:23,090 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 16:42:23,106 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 16:42:23,106 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 16:42:23,106 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 16:42:23,106 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 16:42:23,106 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 16:42:23,106 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 16:42:23,106 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 16:42:23,106 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 16:42:23,115 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-09 16:42:23,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 16:42:23,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:42:23,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 16:42:23,119 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:42:23,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:42:23,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1436431018, now seen corresponding path program 1 times [2020-12-09 16:42:23,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:42:23,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839931326] [2020-12-09 16:42:23,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:42:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:42:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:42:23,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839931326] [2020-12-09 16:42:23,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:42:23,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:42:23,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976004569] [2020-12-09 16:42:23,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 16:42:23,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:42:23,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 16:42:23,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 16:42:23,267 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2020-12-09 16:42:23,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:42:23,277 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-12-09 16:42:23,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 16:42:23,278 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-09 16:42:23,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:42:23,283 INFO L225 Difference]: With dead ends: 18 [2020-12-09 16:42:23,283 INFO L226 Difference]: Without dead ends: 8 [2020-12-09 16:42:23,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 16:42:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-09 16:42:23,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-09 16:42:23,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-09 16:42:23,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-09 16:42:23,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-09 16:42:23,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:42:23,305 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-09 16:42:23,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 16:42:23,305 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-09 16:42:23,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 16:42:23,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:42:23,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:42:23,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 16:42:23,306 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:42:23,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:42:23,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1586971252, now seen corresponding path program 1 times [2020-12-09 16:42:23,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:42:23,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829115503] [2020-12-09 16:42:23,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:42:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:42:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:42:23,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829115503] [2020-12-09 16:42:23,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:42:23,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:42:23,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150517104] [2020-12-09 16:42:23,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 16:42:23,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:42:23,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 16:42:23,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:42:23,424 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2020-12-09 16:42:23,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:42:23,457 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-09 16:42:23,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 16:42:23,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-09 16:42:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:42:23,458 INFO L225 Difference]: With dead ends: 14 [2020-12-09 16:42:23,458 INFO L226 Difference]: Without dead ends: 10 [2020-12-09 16:42:23,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 16:42:23,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-09 16:42:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-09 16:42:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-09 16:42:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-09 16:42:23,463 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2020-12-09 16:42:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:42:23,463 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-09 16:42:23,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 16:42:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-09 16:42:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 16:42:23,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:42:23,464 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:42:23,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 16:42:23,464 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:42:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:42:23,465 INFO L82 PathProgramCache]: Analyzing trace with hash -337671577, now seen corresponding path program 1 times [2020-12-09 16:42:23,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:42:23,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805893438] [2020-12-09 16:42:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:42:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:42:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:42:23,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805893438] [2020-12-09 16:42:23,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076489181] [2020-12-09 16:42:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:42:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:42:23,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 16:42:23,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:42:23,695 INFO L382 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 39 treesize of output 35 [2020-12-09 16:42:23,696 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:42:23,702 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:42:23,704 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:42:23,705 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:59 [2020-12-09 16:42:32,329 INFO L348 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2020-12-09 16:42:32,329 INFO L382 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 66 treesize of output 19 [2020-12-09 16:42:32,332 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:42:32,337 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:42:32,339 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:42:32,339 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:66, output treesize:5 [2020-12-09 16:42:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:42:32,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:42:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:42:32,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [778842316] [2020-12-09 16:42:32,440 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 16:42:32,440 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 16:42:32,444 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 16:42:32,449 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 16:42:32,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 16:42:33,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 16:42:33,970 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: incompatible size at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:210) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:570) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:441) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:239) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:153) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2020-12-09 16:42:33,973 INFO L168 Benchmark]: Toolchain (without parser) took 11540.32 ms. Allocated memory was 115.3 MB in the beginning and 157.3 MB in the end (delta: 41.9 MB). Free memory was 73.1 MB in the beginning and 117.2 MB in the end (delta: -44.1 MB). Peak memory consumption was 59.6 MB. Max. memory is 16.1 GB. [2020-12-09 16:42:33,973 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 115.3 MB. Free memory was 89.2 MB in the beginning and 89.1 MB in the end (delta: 117.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:42:33,974 INFO L168 Benchmark]: CACSL2BoogieTranslator took 166.01 ms. Allocated memory is still 115.3 MB. Free memory was 73.0 MB in the beginning and 96.1 MB in the end (delta: -23.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2020-12-09 16:42:33,974 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.79 ms. Allocated memory is still 115.3 MB. Free memory was 96.1 MB in the beginning and 94.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:42:33,974 INFO L168 Benchmark]: Boogie Preprocessor took 17.99 ms. Allocated memory is still 115.3 MB. Free memory was 94.4 MB in the beginning and 93.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:42:33,975 INFO L168 Benchmark]: RCFGBuilder took 410.04 ms. Allocated memory is still 115.3 MB. Free memory was 93.1 MB in the beginning and 62.5 MB in the end (delta: 30.6 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2020-12-09 16:42:33,975 INFO L168 Benchmark]: TraceAbstraction took 10912.21 ms. Allocated memory was 115.3 MB in the beginning and 157.3 MB in the end (delta: 41.9 MB). Free memory was 62.1 MB in the beginning and 117.2 MB in the end (delta: -55.1 MB). Peak memory consumption was 47.6 MB. Max. memory is 16.1 GB. [2020-12-09 16:42:33,978 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 115.3 MB. Free memory was 89.2 MB in the beginning and 89.1 MB in the end (delta: 117.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 166.01 ms. Allocated memory is still 115.3 MB. Free memory was 73.0 MB in the beginning and 96.1 MB in the end (delta: -23.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.79 ms. Allocated memory is still 115.3 MB. Free memory was 96.1 MB in the beginning and 94.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.99 ms. Allocated memory is still 115.3 MB. Free memory was 94.4 MB in the beginning and 93.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 410.04 ms. Allocated memory is still 115.3 MB. Free memory was 93.1 MB in the beginning and 62.5 MB in the end (delta: 30.6 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10912.21 ms. Allocated memory was 115.3 MB in the beginning and 157.3 MB in the end (delta: 41.9 MB). Free memory was 62.1 MB in the beginning and 117.2 MB in the end (delta: -55.1 MB). Peak memory consumption was 47.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: incompatible size de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: incompatible size: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:210) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 16:42:35,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 16:42:35,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 16:42:35,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 16:42:35,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 16:42:35,575 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 16:42:35,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 16:42:35,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 16:42:35,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 16:42:35,581 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 16:42:35,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 16:42:35,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 16:42:35,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 16:42:35,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 16:42:35,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 16:42:35,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 16:42:35,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 16:42:35,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 16:42:35,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 16:42:35,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 16:42:35,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 16:42:35,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 16:42:35,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 16:42:35,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 16:42:35,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 16:42:35,599 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 16:42:35,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 16:42:35,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 16:42:35,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 16:42:35,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 16:42:35,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 16:42:35,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 16:42:35,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 16:42:35,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 16:42:35,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 16:42:35,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 16:42:35,606 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 16:42:35,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 16:42:35,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 16:42:35,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 16:42:35,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 16:42:35,609 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 16:42:35,626 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 16:42:35,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 16:42:35,627 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 16:42:35,628 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 16:42:35,628 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 16:42:35,628 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 16:42:35,628 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 16:42:35,628 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 16:42:35,628 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 16:42:35,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 16:42:35,629 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 16:42:35,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 16:42:35,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 16:42:35,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 16:42:35,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 16:42:35,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 16:42:35,630 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 16:42:35,630 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 16:42:35,630 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 16:42:35,630 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 16:42:35,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 16:42:35,630 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 16:42:35,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 16:42:35,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 16:42:35,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 16:42:35,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 16:42:35,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:42:35,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 16:42:35,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 16:42:35,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 16:42:35,631 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 16:42:35,632 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 16:42:35,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 16:42:35,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 16:42:35,632 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 16:42:35,632 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-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5a3ee374ac0f96e3c60321b5f69e75eb8e7b4b2 [2020-12-09 16:42:35,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 16:42:35,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 16:42:35,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 16:42:35,880 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 16:42:35,880 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 16:42:35,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/../../sv-benchmarks/c/ldv-regression/test23-2.c [2020-12-09 16:42:35,923 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/data/504ec597c/936f5f3c2a8e4d06896039552ffa93d0/FLAGa546ecbcd [2020-12-09 16:42:36,312 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 16:42:36,313 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/sv-benchmarks/c/ldv-regression/test23-2.c [2020-12-09 16:42:36,318 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/data/504ec597c/936f5f3c2a8e4d06896039552ffa93d0/FLAGa546ecbcd [2020-12-09 16:42:36,331 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/data/504ec597c/936f5f3c2a8e4d06896039552ffa93d0 [2020-12-09 16:42:36,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 16:42:36,334 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 16:42:36,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 16:42:36,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 16:42:36,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 16:42:36,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:42:36" (1/1) ... [2020-12-09 16:42:36,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f168765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:36, skipping insertion in model container [2020-12-09 16:42:36,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:42:36" (1/1) ... [2020-12-09 16:42:36,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 16:42:36,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:42:36,478 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/sv-benchmarks/c/ldv-regression/test23-2.c[1070,1083] [2020-12-09 16:42:36,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:42:36,493 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 16:42:36,521 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/sv-benchmarks/c/ldv-regression/test23-2.c[1070,1083] [2020-12-09 16:42:36,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:42:36,534 INFO L208 MainTranslator]: Completed translation [2020-12-09 16:42:36,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:36 WrapperNode [2020-12-09 16:42:36,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 16:42:36,536 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 16:42:36,536 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 16:42:36,536 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 16:42:36,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:36" (1/1) ... [2020-12-09 16:42:36,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:36" (1/1) ... [2020-12-09 16:42:36,571 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 16:42:36,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 16:42:36,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 16:42:36,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 16:42:36,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:36" (1/1) ... [2020-12-09 16:42:36,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:36" (1/1) ... [2020-12-09 16:42:36,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:36" (1/1) ... [2020-12-09 16:42:36,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:36" (1/1) ... [2020-12-09 16:42:36,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:36" (1/1) ... [2020-12-09 16:42:36,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:36" (1/1) ... [2020-12-09 16:42:36,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:36" (1/1) ... [2020-12-09 16:42:36,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 16:42:36,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 16:42:36,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 16:42:36,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 16:42:36,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:42:36,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 16:42:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 16:42:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 16:42:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 16:42:36,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 16:42:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-09 16:42:36,940 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 16:42:36,940 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-09 16:42:36,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:42:36 BoogieIcfgContainer [2020-12-09 16:42:36,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 16:42:36,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 16:42:36,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 16:42:36,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 16:42:36,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:42:36" (1/3) ... [2020-12-09 16:42:36,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a212ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:42:36, skipping insertion in model container [2020-12-09 16:42:36,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:42:36" (2/3) ... [2020-12-09 16:42:36,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a212ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:42:36, skipping insertion in model container [2020-12-09 16:42:36,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:42:36" (3/3) ... [2020-12-09 16:42:36,947 INFO L111 eAbstractionObserver]: Analyzing ICFG test23-2.c [2020-12-09 16:42:36,956 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 16:42:36,959 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 16:42:36,966 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 16:42:36,983 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 16:42:36,983 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 16:42:36,983 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 16:42:36,983 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 16:42:36,983 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 16:42:36,983 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 16:42:36,984 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 16:42:36,984 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 16:42:36,992 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-09 16:42:36,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 16:42:36,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:42:36,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:42:36,996 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:42:37,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:42:37,000 INFO L82 PathProgramCache]: Analyzing trace with hash 2100293056, now seen corresponding path program 1 times [2020-12-09 16:42:37,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:42:37,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148374342] [2020-12-09 16:42:37,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 16:42:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:42:37,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 16:42:37,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:42:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:42:37,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:42:37,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148374342] [2020-12-09 16:42:37,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:42:37,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:42:37,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602088459] [2020-12-09 16:42:37,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 16:42:37,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:42:37,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 16:42:37,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 16:42:37,131 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-09 16:42:37,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:42:37,141 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-12-09 16:42:37,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 16:42:37,142 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-12-09 16:42:37,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:42:37,148 INFO L225 Difference]: With dead ends: 30 [2020-12-09 16:42:37,148 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 16:42:37,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 16:42:37,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 16:42:37,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-09 16:42:37,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 16:42:37,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-09 16:42:37,171 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2020-12-09 16:42:37,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:42:37,171 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-09 16:42:37,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 16:42:37,171 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-09 16:42:37,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 16:42:37,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:42:37,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:42:37,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 16:42:37,373 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:42:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:42:37,373 INFO L82 PathProgramCache]: Analyzing trace with hash 478567452, now seen corresponding path program 1 times [2020-12-09 16:42:37,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:42:37,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207849594] [2020-12-09 16:42:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 16:42:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:42:37,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 16:42:37,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:42:37,574 INFO L382 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 [2020-12-09 16:42:37,575 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:42:37,593 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:42:37,595 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:42:37,596 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:24 [2020-12-09 16:42:37,670 INFO L382 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 15 [2020-12-09 16:42:37,672 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:42:37,679 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:42:37,680 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:42:37,680 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:12 [2020-12-09 16:42:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:42:37,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:42:37,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207849594] [2020-12-09 16:42:37,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:42:37,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-09 16:42:37,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23099116] [2020-12-09 16:42:37,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 16:42:37,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:42:37,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 16:42:37,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-09 16:42:37,723 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 10 states. [2020-12-09 16:42:38,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:42:38,908 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-12-09 16:42:38,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-09 16:42:38,909 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-12-09 16:42:38,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:42:38,910 INFO L225 Difference]: With dead ends: 63 [2020-12-09 16:42:38,910 INFO L226 Difference]: Without dead ends: 58 [2020-12-09 16:42:38,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2020-12-09 16:42:38,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-09 16:42:38,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 19. [2020-12-09 16:42:38,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 16:42:38,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-09 16:42:38,916 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-12-09 16:42:38,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:42:38,916 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-09 16:42:38,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 16:42:38,916 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-09 16:42:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 16:42:38,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:42:38,917 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:42:39,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 16:42:39,119 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:42:39,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:42:39,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1851619425, now seen corresponding path program 1 times [2020-12-09 16:42:39,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:42:39,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765726731] [2020-12-09 16:42:39,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 16:42:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:42:39,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 16:42:39,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:42:39,319 INFO L382 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 [2020-12-09 16:42:39,320 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:42:39,330 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:42:39,331 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:42:39,332 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:24 [2020-12-09 16:42:39,396 INFO L382 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 15 [2020-12-09 16:42:39,397 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:42:39,408 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:42:39,409 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:42:39,409 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:12 [2020-12-09 16:42:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:42:39,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:42:39,612 INFO L382 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 59 treesize of output 50 [2020-12-09 16:42:39,614 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2020-12-09 16:42:39,646 INFO L625 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2020-12-09 16:42:39,649 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-09 16:42:39,650 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:7 [2020-12-09 16:42:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:42:39,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765726731] [2020-12-09 16:42:39,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [262838763] [2020-12-09 16:42:39,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt [2020-12-09 16:42:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:42:39,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-09 16:42:39,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:42:40,022 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-09 16:42:40,023 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:42:40,050 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:42:40,052 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:42:40,052 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2020-12-09 16:42:40,390 INFO L382 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 57 treesize of output 17 [2020-12-09 16:42:40,391 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:42:40,421 INFO L625 ElimStorePlain]: treesize reduction 7, result has 70.8 percent of original size [2020-12-09 16:42:40,422 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:42:40,423 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:16 [2020-12-09 16:42:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:42:40,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:42:40,632 INFO L382 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 116 treesize of output 98 [2020-12-09 16:42:40,634 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:42:40,635 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:42:40,639 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:42:40,670 INFO L625 ElimStorePlain]: treesize reduction 36, result has 35.7 percent of original size [2020-12-09 16:42:40,672 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-09 16:42:40,673 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:7 [2020-12-09 16:42:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:42:40,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319068670] [2020-12-09 16:42:40,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:42:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:42:40,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-09 16:42:40,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:42:40,771 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-09 16:42:40,772 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:42:40,796 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:42:40,797 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:42:40,797 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2020-12-09 16:42:41,719 INFO L382 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 57 treesize of output 17 [2020-12-09 16:42:41,720 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:42:41,746 INFO L625 ElimStorePlain]: treesize reduction 5, result has 75.0 percent of original size [2020-12-09 16:42:41,746 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:42:41,747 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:12 [2020-12-09 16:42:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:42:41,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:42:41,767 INFO L382 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 116 treesize of output 98 [2020-12-09 16:42:41,769 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:42:41,769 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:42:41,772 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:42:41,809 INFO L625 ElimStorePlain]: treesize reduction 36, result has 35.7 percent of original size [2020-12-09 16:42:41,811 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-09 16:42:41,812 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:7 [2020-12-09 16:42:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:42:41,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 16:42:41,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12, 12, 12, 12] total 29 [2020-12-09 16:42:41,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252016782] [2020-12-09 16:42:41,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-09 16:42:41,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:42:41,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-09 16:42:41,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=692, Unknown=9, NotChecked=0, Total=812 [2020-12-09 16:42:41,829 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 29 states. [2020-12-09 16:42:43,508 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-09 16:42:45,290 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-12-09 16:42:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:42:46,876 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-12-09 16:42:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-09 16:42:46,877 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 18 [2020-12-09 16:42:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:42:46,878 INFO L225 Difference]: With dead ends: 83 [2020-12-09 16:42:46,878 INFO L226 Difference]: Without dead ends: 78 [2020-12-09 16:42:46,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=692, Invalid=3204, Unknown=10, NotChecked=0, Total=3906 [2020-12-09 16:42:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-09 16:42:46,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 31. [2020-12-09 16:42:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 16:42:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-12-09 16:42:46,885 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 18 [2020-12-09 16:42:46,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:42:46,885 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-12-09 16:42:46,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-09 16:42:46,886 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-12-09 16:42:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 16:42:46,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:42:46,886 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:42:47,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 cvc4 --incremental --print-success --lang smt [2020-12-09 16:42:47,490 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:42:47,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:42:47,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1013708501, now seen corresponding path program 2 times [2020-12-09 16:42:47,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:42:47,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291128081] [2020-12-09 16:42:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 16:42:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:42:47,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-09 16:42:47,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:42:47,652 INFO L382 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 [2020-12-09 16:42:47,653 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:42:47,670 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:42:47,671 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:42:47,671 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:24 [2020-12-09 16:42:47,931 INFO L382 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 15 [2020-12-09 16:42:47,932 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:42:47,942 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:42:47,943 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:42:47,943 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:16 [2020-12-09 16:42:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:42:47,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:42:48,384 INFO L382 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 120 treesize of output 102 [2020-12-09 16:42:48,386 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:42:48,386 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:42:48,389 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:42:48,429 INFO L625 ElimStorePlain]: treesize reduction 55, result has 26.7 percent of original size [2020-12-09 16:42:48,432 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-09 16:42:48,432 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:7 [2020-12-09 16:42:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:42:48,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291128081] [2020-12-09 16:42:48,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [144274436] [2020-12-09 16:42:48,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt [2020-12-09 16:42:48,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 16:42:48,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 16:42:48,600 WARN L261 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-09 16:42:48,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:42:48,611 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2020-12-09 16:42:48,612 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-09 16:42:48,658 INFO L625 ElimStorePlain]: treesize reduction 26, result has 56.7 percent of original size [2020-12-09 16:42:48,662 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2020-12-09 16:42:48,663 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:42:48,680 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:42:48,685 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:42:48,685 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:38, output treesize:23 [2020-12-09 16:42:48,762 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2020-12-09 16:42:48,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:42:48,768 INFO L382 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 0 case distinctions, treesize of input 35 treesize of output 33 [2020-12-09 16:42:48,769 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:42:48,788 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:42:48,788 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:42:48,808 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:42:48,809 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-09 16:42:48,809 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:60, output treesize:34 [2020-12-09 16:42:54,927 WARN L197 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 27 [2020-12-09 16:42:59,061 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 31 [2020-12-09 16:43:03,191 WARN L197 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 31 [2020-12-09 16:43:07,334 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 31 [2020-12-09 16:43:11,469 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 16:43:15,630 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 16:43:19,789 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 16:43:19,811 INFO L382 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 0 case distinctions, treesize of input 41 treesize of output 39 [2020-12-09 16:43:19,812 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:43:19,935 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-09 16:43:19,936 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:43:19,938 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2020-12-09 16:43:19,938 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:78, output treesize:70 [2020-12-09 16:43:22,162 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 46 [2020-12-09 16:43:24,396 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 47 [2020-12-09 16:43:26,586 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 46 [2020-12-09 16:43:28,797 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 50 [2020-12-09 16:43:31,127 WARN L197 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 51 [2020-12-09 16:43:33,436 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 47 [2020-12-09 16:43:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:43:33,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:43:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:43:38,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575997767] [2020-12-09 16:43:38,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:43:39,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 16:43:39,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 16:43:39,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-09 16:43:39,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:44:00,605 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-09 16:44:00,606 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:44:00,644 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:44:00,645 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:44:00,645 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2020-12-09 16:44:03,218 INFO L382 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 78 treesize of output 22 [2020-12-09 16:44:03,219 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:44:03,252 INFO L625 ElimStorePlain]: treesize reduction 10, result has 60.0 percent of original size [2020-12-09 16:44:03,253 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:44:03,253 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:12 [2020-12-09 16:44:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 9 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:44:03,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:44:04,277 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 154 [2020-12-09 16:44:04,278 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:44:04,279 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:44:04,279 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:44:04,280 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:44:04,281 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:44:04,281 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:44:04,285 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:44:04,375 INFO L625 ElimStorePlain]: treesize reduction 103, result has 16.3 percent of original size [2020-12-09 16:44:04,377 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-09 16:44:04,378 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:102, output treesize:7 [2020-12-09 16:44:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:44:04,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 16:44:04,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15, 17, 15, 15] total 65 [2020-12-09 16:44:04,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942858001] [2020-12-09 16:44:04,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-09 16:44:04,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:44:04,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-09 16:44:04,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=3792, Unknown=27, NotChecked=0, Total=4160 [2020-12-09 16:44:04,390 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 65 states. [2020-12-09 16:44:16,131 WARN L197 SmtUtils]: Spent 8.12 s on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-12-09 16:44:24,806 WARN L197 SmtUtils]: Spent 8.12 s on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-12-09 16:44:33,436 WARN L197 SmtUtils]: Spent 8.14 s on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-12-09 16:45:00,247 WARN L197 SmtUtils]: Spent 4.29 s on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-09 16:45:42,148 WARN L197 SmtUtils]: Spent 4.27 s on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-12-09 16:46:14,044 WARN L197 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-12-09 16:46:49,631 WARN L197 SmtUtils]: Spent 6.41 s on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-12-09 16:47:16,767 WARN L197 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-09 16:47:43,876 WARN L197 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-12-09 16:48:11,446 WARN L197 SmtUtils]: Spent 4.44 s on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-09 16:48:39,400 WARN L197 SmtUtils]: Spent 4.82 s on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-12-09 16:49:02,795 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-12-09 16:49:03,196 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2020-12-09 16:49:03,608 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2020-12-09 16:49:04,041 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2020-12-09 16:49:22,478 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2020-12-09 16:49:22,892 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2020-12-09 16:49:23,299 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2020-12-09 16:49:23,747 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-12-09 16:49:42,215 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-12-09 16:49:42,621 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-12-09 16:49:43,066 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2020-12-09 16:49:43,524 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-12-09 16:50:01,912 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2020-12-09 16:50:02,279 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-12-09 16:50:02,663 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2020-12-09 16:50:03,122 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2020-12-09 16:50:21,473 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2020-12-09 16:50:40,746 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2020-12-09 16:52:45,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:52:45,068 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2020-12-09 16:52:45,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-09 16:52:45,071 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 22 [2020-12-09 16:52:45,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:52:45,072 INFO L225 Difference]: With dead ends: 119 [2020-12-09 16:52:45,072 INFO L226 Difference]: Without dead ends: 114 [2020-12-09 16:52:45,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5145 ImplicationChecksByTransitivity, 416.2s TimeCoverageRelationStatistics Valid=2528, Invalid=15413, Unknown=149, NotChecked=0, Total=18090 [2020-12-09 16:52:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-09 16:52:45,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 33. [2020-12-09 16:52:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 16:52:45,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-09 16:52:45,085 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 22 [2020-12-09 16:52:45,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:52:45,085 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-09 16:52:45,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-09 16:52:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-09 16:52:45,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-09 16:52:45,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:52:45,086 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:52:45,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt [2020-12-09 16:52:45,689 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:52:45,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:52:45,691 INFO L82 PathProgramCache]: Analyzing trace with hash -954135740, now seen corresponding path program 3 times [2020-12-09 16:52:45,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:52:45,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433579243] [2020-12-09 16:52:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-09 16:52:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:52:45,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-09 16:52:45,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:52:45,927 INFO L382 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 [2020-12-09 16:52:45,928 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:52:45,945 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:52:45,945 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:52:45,945 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:24 [2020-12-09 16:52:46,876 INFO L382 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 15 [2020-12-09 16:52:46,877 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:52:46,890 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:52:46,891 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:52:46,891 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:12 [2020-12-09 16:52:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:52:46,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:52:48,604 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 154 [2020-12-09 16:52:48,605 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:52:48,606 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:52:48,606 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:52:48,607 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:52:48,607 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:52:48,608 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:52:48,611 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:52:48,682 INFO L625 ElimStorePlain]: treesize reduction 81, result has 19.8 percent of original size [2020-12-09 16:52:48,684 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-09 16:52:48,684 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:102, output treesize:7 [2020-12-09 16:52:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:52:48,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433579243] [2020-12-09 16:52:48,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [947589062] [2020-12-09 16:52:48,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt [2020-12-09 16:52:48,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 16:52:48,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 16:52:48,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-09 16:52:48,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:52:48,857 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2020-12-09 16:52:48,859 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-09 16:52:48,928 INFO L625 ElimStorePlain]: treesize reduction 26, result has 56.7 percent of original size [2020-12-09 16:52:48,934 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2020-12-09 16:52:48,935 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:52:48,962 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:52:48,968 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:52:48,969 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:38, output treesize:23 [2020-12-09 16:52:49,118 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2020-12-09 16:52:49,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:52:49,126 INFO L382 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 0 case distinctions, treesize of input 35 treesize of output 33 [2020-12-09 16:52:49,127 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 16:52:49,146 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:52:49,146 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:52:49,171 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:52:49,172 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-09 16:52:49,172 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:60, output treesize:34 [2020-12-09 16:52:55,388 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 27 [2020-12-09 16:52:59,600 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 31 [2020-12-09 16:53:03,825 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 31 [2020-12-09 16:53:08,064 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 31 [2020-12-09 16:53:12,327 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 16:53:16,565 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 16:53:20,808 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-09 16:53:20,826 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2020-12-09 16:53:20,827 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:53:20,887 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:53:20,889 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2020-12-09 16:53:20,889 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:56 [2020-12-09 16:53:23,157 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 42 [2020-12-09 16:53:25,503 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 46 [2020-12-09 16:53:27,869 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 48 [2020-12-09 16:53:30,226 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 43 [2020-12-09 16:53:32,604 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 43 [2020-12-09 16:53:32,611 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 16:53:32,613 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 16:53:32,613 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 16:53:32,616 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 16:53:32,616 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 16:53:32,618 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-09 16:53:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-09 16:53:32,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:54:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-09 16:54:59,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357610711] [2020-12-09 16:54:59,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3b947eae-4f40-4569-8a59-7e2db9a6d951/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:54:59,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 16:54:59,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 16:54:59,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-09 16:54:59,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:55:21,281 INFO L382 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 16 treesize of output 12 [2020-12-09 16:55:21,282 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:55:21,313 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:55:21,314 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:55:21,314 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:46 [2020-12-09 16:55:46,302 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 16:55:46,305 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 16:55:46,306 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 16:55:46,307 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 16:55:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 16:55:46,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:56:10,769 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-12-09 16:56:10,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2020-12-09 16:56:10,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 16, 15] total 60 [2020-12-09 16:56:10,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315901949] [2020-12-09 16:56:10,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-09 16:56:10,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:56:10,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-09 16:56:10,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=5564, Unknown=40, NotChecked=0, Total=6006 [2020-12-09 16:56:10,772 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 60 states. [2020-12-09 16:56:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 16:56:11,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 mathsat -unsat_core_generation=3,11 cvc4 --incremental --print-success --lang smt [2020-12-09 16:56:11,377 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@f3cc1f5 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:743) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:674) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2020-12-09 16:56:11,385 INFO L168 Benchmark]: Toolchain (without parser) took 815050.55 ms. Allocated memory was 65.0 MB in the beginning and 98.6 MB in the end (delta: 33.6 MB). Free memory was 46.6 MB in the beginning and 31.0 MB in the end (delta: 15.5 MB). Peak memory consumption was 48.9 MB. Max. memory is 16.1 GB. [2020-12-09 16:56:11,386 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 65.0 MB. Free memory was 48.0 MB in the beginning and 47.9 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:56:11,386 INFO L168 Benchmark]: CACSL2BoogieTranslator took 199.46 ms. Allocated memory is still 65.0 MB. Free memory was 46.4 MB in the beginning and 48.5 MB in the end (delta: -2.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 16:56:11,386 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.16 ms. Allocated memory is still 65.0 MB. Free memory was 48.5 MB in the beginning and 46.7 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:56:11,387 INFO L168 Benchmark]: Boogie Preprocessor took 27.43 ms. Allocated memory is still 65.0 MB. Free memory was 46.7 MB in the beginning and 45.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:56:11,387 INFO L168 Benchmark]: RCFGBuilder took 340.57 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 45.3 MB in the beginning and 62.4 MB in the end (delta: -17.1 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2020-12-09 16:56:11,387 INFO L168 Benchmark]: TraceAbstraction took 814442.15 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 62.0 MB in the beginning and 31.0 MB in the end (delta: 31.0 MB). Peak memory consumption was 48.7 MB. Max. memory is 16.1 GB. [2020-12-09 16:56:11,389 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 65.0 MB. Free memory was 48.0 MB in the beginning and 47.9 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 199.46 ms. Allocated memory is still 65.0 MB. Free memory was 46.4 MB in the beginning and 48.5 MB in the end (delta: -2.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.16 ms. Allocated memory is still 65.0 MB. Free memory was 48.5 MB in the beginning and 46.7 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.43 ms. Allocated memory is still 65.0 MB. Free memory was 46.7 MB in the beginning and 45.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 340.57 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 45.3 MB in the beginning and 62.4 MB in the end (delta: -17.1 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 814442.15 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 62.0 MB in the beginning and 31.0 MB in the end (delta: 31.0 MB). Peak memory consumption was 48.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@f3cc1f5 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@f3cc1f5: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...