./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.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_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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 e1bf0d13b0acf89aecbbf410d877da8d9010361f ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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 e1bf0d13b0acf89aecbbf410d877da8d9010361f ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 14:21:24,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 14:21:24,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 14:21:24,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 14:21:24,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 14:21:24,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 14:21:24,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 14:21:24,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 14:21:24,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 14:21:24,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 14:21:24,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 14:21:24,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 14:21:24,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 14:21:24,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 14:21:24,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 14:21:24,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 14:21:24,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 14:21:24,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 14:21:24,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 14:21:24,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 14:21:24,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 14:21:24,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 14:21:24,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 14:21:24,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 14:21:24,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 14:21:24,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 14:21:24,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 14:21:24,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 14:21:24,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 14:21:24,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 14:21:24,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 14:21:24,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 14:21:24,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 14:21:24,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 14:21:24,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 14:21:24,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 14:21:24,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 14:21:24,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 14:21:24,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 14:21:24,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 14:21:24,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 14:21:24,685 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 14:21:24,706 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 14:21:24,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 14:21:24,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 14:21:24,707 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 14:21:24,707 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 14:21:24,708 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 14:21:24,708 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 14:21:24,708 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 14:21:24,708 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 14:21:24,708 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 14:21:24,708 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 14:21:24,709 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 14:21:24,709 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 14:21:24,709 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 14:21:24,709 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 14:21:24,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 14:21:24,710 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 14:21:24,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 14:21:24,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 14:21:24,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 14:21:24,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 14:21:24,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 14:21:24,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 14:21:24,711 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 14:21:24,711 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 14:21:24,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 14:21:24,712 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 14:21:24,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 14:21:24,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 14:21:24,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 14:21:24,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 14:21:24,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 14:21:24,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 14:21:24,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 14:21:24,713 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 14:21:24,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 14:21:24,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 14:21:24,714 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 14:21:24,714 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 14:21:24,714 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_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1bf0d13b0acf89aecbbf410d877da8d9010361f [2020-12-09 14:21:24,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 14:21:24,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 14:21:24,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 14:21:24,905 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 14:21:24,905 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 14:21:24,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2020-12-09 14:21:24,950 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/data/ef36b2cf1/dbf89535877149e9b8c386f43249c1b9/FLAGbe10110c8 [2020-12-09 14:21:25,311 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 14:21:25,311 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/sv-benchmarks/c/verifythis/prefixsum_iter.c [2020-12-09 14:21:25,316 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/data/ef36b2cf1/dbf89535877149e9b8c386f43249c1b9/FLAGbe10110c8 [2020-12-09 14:21:25,326 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/data/ef36b2cf1/dbf89535877149e9b8c386f43249c1b9 [2020-12-09 14:21:25,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 14:21:25,330 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 14:21:25,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 14:21:25,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 14:21:25,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 14:21:25,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:21:25" (1/1) ... [2020-12-09 14:21:25,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a00c649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:21:25, skipping insertion in model container [2020-12-09 14:21:25,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:21:25" (1/1) ... [2020-12-09 14:21:25,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 14:21:25,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 14:21:25,467 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_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2020-12-09 14:21:25,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 14:21:25,494 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 14:21:25,502 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_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2020-12-09 14:21:25,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 14:21:25,523 INFO L208 MainTranslator]: Completed translation [2020-12-09 14:21:25,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:21:25 WrapperNode [2020-12-09 14:21:25,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 14:21:25,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 14:21:25,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 14:21:25,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 14:21:25,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:21:25" (1/1) ... [2020-12-09 14:21:25,536 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:21:25" (1/1) ... [2020-12-09 14:21:25,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 14:21:25,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 14:21:25,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 14:21:25,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 14:21:25,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:21:25" (1/1) ... [2020-12-09 14:21:25,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:21:25" (1/1) ... [2020-12-09 14:21:25,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:21:25" (1/1) ... [2020-12-09 14:21:25,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:21:25" (1/1) ... [2020-12-09 14:21:25,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:21:25" (1/1) ... [2020-12-09 14:21:25,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:21:25" (1/1) ... [2020-12-09 14:21:25,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:21:25" (1/1) ... [2020-12-09 14:21:25,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 14:21:25,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 14:21:25,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 14:21:25,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 14:21:25,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:21:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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 14:21:25,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 14:21:25,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 14:21:25,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 14:21:25,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 14:21:25,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 14:21:25,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 14:21:25,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 14:21:25,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 14:21:26,055 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 14:21:26,055 INFO L299 CfgBuilder]: Removed 29 assume(true) statements. [2020-12-09 14:21:26,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:21:26 BoogieIcfgContainer [2020-12-09 14:21:26,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 14:21:26,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 14:21:26,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 14:21:26,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 14:21:26,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 02:21:25" (1/3) ... [2020-12-09 14:21:26,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e374c13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:21:26, skipping insertion in model container [2020-12-09 14:21:26,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:21:25" (2/3) ... [2020-12-09 14:21:26,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e374c13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:21:26, skipping insertion in model container [2020-12-09 14:21:26,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:21:26" (3/3) ... [2020-12-09 14:21:26,065 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2020-12-09 14:21:26,077 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 14:21:26,080 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 14:21:26,090 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 14:21:26,112 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 14:21:26,112 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 14:21:26,112 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 14:21:26,112 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 14:21:26,112 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 14:21:26,112 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 14:21:26,112 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 14:21:26,113 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 14:21:26,123 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-09 14:21:26,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 14:21:26,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:21:26,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:21:26,128 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:21:26,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:21:26,133 INFO L82 PathProgramCache]: Analyzing trace with hash 115659518, now seen corresponding path program 1 times [2020-12-09 14:21:26,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:21:26,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612753977] [2020-12-09 14:21:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:21:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:21:26,344 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 14:21:26,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612753977] [2020-12-09 14:21:26,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:21:26,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 14:21:26,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621045755] [2020-12-09 14:21:26,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 14:21:26,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 14:21:26,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 14:21:26,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 14:21:26,359 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 5 states. [2020-12-09 14:21:26,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:21:26,413 INFO L93 Difference]: Finished difference Result 26 states and 39 transitions. [2020-12-09 14:21:26,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 14:21:26,414 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 14:21:26,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:21:26,420 INFO L225 Difference]: With dead ends: 26 [2020-12-09 14:21:26,420 INFO L226 Difference]: Without dead ends: 13 [2020-12-09 14:21:26,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 14:21:26,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-09 14:21:26,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-09 14:21:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 14:21:26,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2020-12-09 14:21:26,445 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 19 transitions. Word has length 8 [2020-12-09 14:21:26,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:21:26,445 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 19 transitions. [2020-12-09 14:21:26,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 14:21:26,445 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 19 transitions. [2020-12-09 14:21:26,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 14:21:26,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:21:26,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:21:26,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 14:21:26,446 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:21:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:21:26,447 INFO L82 PathProgramCache]: Analyzing trace with hash 825691042, now seen corresponding path program 1 times [2020-12-09 14:21:26,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:21:26,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652507432] [2020-12-09 14:21:26,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:21:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:21:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 14:21:26,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652507432] [2020-12-09 14:21:26,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:21:26,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 14:21:26,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164608536] [2020-12-09 14:21:26,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 14:21:26,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 14:21:26,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 14:21:26,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 14:21:26,561 INFO L87 Difference]: Start difference. First operand 13 states and 19 transitions. Second operand 5 states. [2020-12-09 14:21:26,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:21:26,616 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2020-12-09 14:21:26,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 14:21:26,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 14:21:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:21:26,617 INFO L225 Difference]: With dead ends: 18 [2020-12-09 14:21:26,617 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 14:21:26,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 14:21:26,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 14:21:26,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-09 14:21:26,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 14:21:26,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2020-12-09 14:21:26,621 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 21 transitions. Word has length 9 [2020-12-09 14:21:26,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:21:26,622 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 21 transitions. [2020-12-09 14:21:26,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 14:21:26,622 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 21 transitions. [2020-12-09 14:21:26,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 14:21:26,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:21:26,622 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:21:26,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 14:21:26,623 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:21:26,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:21:26,623 INFO L82 PathProgramCache]: Analyzing trace with hash 888615641, now seen corresponding path program 1 times [2020-12-09 14:21:26,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:21:26,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199666864] [2020-12-09 14:21:26,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:21:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:21:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:21:26,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199666864] [2020-12-09 14:21:26,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142648469] [2020-12-09 14:21:26,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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 14:21:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:21:26,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 14:21:26,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:21:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:21:26,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:21:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:21:26,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1658690728] [2020-12-09 14:21:26,885 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 14:21:26,885 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 14:21:26,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 14:21:26,892 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 14:21:26,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 14:21:27,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:27,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:27,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:27,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:27,609 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:27,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:27,644 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:27,668 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:27,718 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:27,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:27,783 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:27,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:27,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:27,993 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:28,120 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 14:21:28,843 WARN L197 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 141 [2020-12-09 14:21:29,158 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-12-09 14:21:29,398 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2020-12-09 14:21:29,696 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 108 [2020-12-09 14:21:30,190 WARN L197 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 125 [2020-12-09 14:21:30,751 WARN L197 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 140 [2020-12-09 14:21:31,306 WARN L197 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 142 [2020-12-09 14:21:31,309 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 14:21:31,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 14:21:31,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2020-12-09 14:21:31,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332386297] [2020-12-09 14:21:31,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 14:21:31,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 14:21:31,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 14:21:31,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-12-09 14:21:31,311 INFO L87 Difference]: Start difference. First operand 15 states and 21 transitions. Second operand 11 states. [2020-12-09 14:21:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:21:31,372 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2020-12-09 14:21:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 14:21:31,373 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2020-12-09 14:21:31,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:21:31,373 INFO L225 Difference]: With dead ends: 29 [2020-12-09 14:21:31,373 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 14:21:31,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-12-09 14:21:31,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 14:21:31,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-09 14:21:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 14:21:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2020-12-09 14:21:31,376 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 12 [2020-12-09 14:21:31,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:21:31,377 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2020-12-09 14:21:31,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 14:21:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2020-12-09 14:21:31,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 14:21:31,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:21:31,377 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:21:31,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 14:21:31,579 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:21:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:21:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash 74742141, now seen corresponding path program 2 times [2020-12-09 14:21:31,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:21:31,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354778173] [2020-12-09 14:21:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:21:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:21:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 14:21:31,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354778173] [2020-12-09 14:21:31,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732950282] [2020-12-09 14:21:31,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:21:31,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 14:21:31,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 14:21:31,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 14:21:31,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:21:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 14:21:31,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:21:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 14:21:31,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1151035802] [2020-12-09 14:21:31,737 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 14:21:31,737 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 14:21:31,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 14:21:31,737 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 14:21:31,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 14:21:31,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:31,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:31,822 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:31,833 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:32,240 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:32,383 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:32,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:32,504 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 14:21:33,064 WARN L197 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 141 [2020-12-09 14:21:33,346 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-12-09 14:21:33,602 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2020-12-09 14:21:33,878 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 108 [2020-12-09 14:21:34,367 WARN L197 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 125 [2020-12-09 14:21:34,953 WARN L197 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 140 [2020-12-09 14:21:35,511 WARN L197 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 142 [2020-12-09 14:21:35,512 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 14:21:35,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 14:21:35,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2020-12-09 14:21:35,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886507917] [2020-12-09 14:21:35,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 14:21:35,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 14:21:35,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 14:21:35,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-12-09 14:21:35,515 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 9 states. [2020-12-09 14:21:35,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:21:35,574 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2020-12-09 14:21:35,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 14:21:35,575 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-09 14:21:35,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:21:35,575 INFO L225 Difference]: With dead ends: 27 [2020-12-09 14:21:35,575 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 14:21:35,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-12-09 14:21:35,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 14:21:35,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-09 14:21:35,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 14:21:35,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2020-12-09 14:21:35,578 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 13 [2020-12-09 14:21:35,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:21:35,578 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2020-12-09 14:21:35,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 14:21:35,579 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2020-12-09 14:21:35,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 14:21:35,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:21:35,579 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:21:35,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:21:35,781 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:21:35,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:21:35,782 INFO L82 PathProgramCache]: Analyzing trace with hash 814219959, now seen corresponding path program 1 times [2020-12-09 14:21:35,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:21:35,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334883929] [2020-12-09 14:21:35,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:21:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:21:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 14:21:35,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334883929] [2020-12-09 14:21:35,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:21:35,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 14:21:35,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716962745] [2020-12-09 14:21:35,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 14:21:35,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 14:21:35,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 14:21:35,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 14:21:35,814 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand 3 states. [2020-12-09 14:21:35,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:21:35,825 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2020-12-09 14:21:35,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 14:21:35,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-12-09 14:21:35,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:21:35,826 INFO L225 Difference]: With dead ends: 29 [2020-12-09 14:21:35,826 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 14:21:35,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 14:21:35,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 14:21:35,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-09 14:21:35,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 14:21:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2020-12-09 14:21:35,830 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 15 [2020-12-09 14:21:35,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:21:35,830 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2020-12-09 14:21:35,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 14:21:35,831 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2020-12-09 14:21:35,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 14:21:35,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:21:35,831 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:21:35,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-12-09 14:21:35,831 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:21:35,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:21:35,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1073449179, now seen corresponding path program 1 times [2020-12-09 14:21:35,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:21:35,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417948736] [2020-12-09 14:21:35,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:21:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:21:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 14:21:35,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417948736] [2020-12-09 14:21:35,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023636424] [2020-12-09 14:21:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:21:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:21:35,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 14:21:35,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:21:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 14:21:36,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:21:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 14:21:36,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 14:21:36,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 9 [2020-12-09 14:21:36,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679814804] [2020-12-09 14:21:36,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 14:21:36,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 14:21:36,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 14:21:36,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-09 14:21:36,064 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand 5 states. [2020-12-09 14:21:36,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:21:36,096 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2020-12-09 14:21:36,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 14:21:36,096 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-09 14:21:36,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:21:36,097 INFO L225 Difference]: With dead ends: 28 [2020-12-09 14:21:36,097 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 14:21:36,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-09 14:21:36,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 14:21:36,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-12-09 14:21:36,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 14:21:36,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2020-12-09 14:21:36,101 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 16 [2020-12-09 14:21:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:21:36,101 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2020-12-09 14:21:36,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 14:21:36,101 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-12-09 14:21:36,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 14:21:36,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:21:36,102 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:21:36,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-09 14:21:36,303 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:21:36,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:21:36,304 INFO L82 PathProgramCache]: Analyzing trace with hash 500863050, now seen corresponding path program 1 times [2020-12-09 14:21:36,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:21:36,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049357772] [2020-12-09 14:21:36,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:21:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:21:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 14:21:36,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049357772] [2020-12-09 14:21:36,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147997514] [2020-12-09 14:21:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:21:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:21:36,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 14:21:36,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:21:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 14:21:36,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:21:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 14:21:36,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1036476700] [2020-12-09 14:21:36,629 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 14:21:36,629 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 14:21:36,629 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 14:21:36,629 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 14:21:36,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 14:21:36,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:36,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:36,792 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:36,801 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:37,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:37,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:37,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:37,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:37,804 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:37,818 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:37,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:37,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:37,895 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:21:38,139 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 14:21:38,714 WARN L197 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 142 [2020-12-09 14:21:39,012 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-12-09 14:21:39,803 WARN L197 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 96 [2020-12-09 14:21:40,044 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2020-12-09 14:21:40,412 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 104 [2020-12-09 14:21:40,848 WARN L197 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 111 [2020-12-09 14:21:41,357 WARN L197 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 126 [2020-12-09 14:21:41,921 WARN L197 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 141 [2020-12-09 14:21:42,492 WARN L197 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 143 [2020-12-09 14:21:42,493 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 14:21:42,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 14:21:42,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2020-12-09 14:21:42,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781157380] [2020-12-09 14:21:42,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 14:21:42,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 14:21:42,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 14:21:42,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-12-09 14:21:42,495 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 12 states. [2020-12-09 14:21:42,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:21:42,594 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2020-12-09 14:21:42,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 14:21:42,594 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-12-09 14:21:42,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:21:42,595 INFO L225 Difference]: With dead ends: 28 [2020-12-09 14:21:42,595 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 14:21:42,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2020-12-09 14:21:42,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 14:21:42,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-09 14:21:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 14:21:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2020-12-09 14:21:42,599 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 18 [2020-12-09 14:21:42,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:21:42,599 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2020-12-09 14:21:42,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 14:21:42,599 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2020-12-09 14:21:42,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 14:21:42,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:21:42,600 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:21:42,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:21:42,802 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:21:42,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:21:42,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1545555487, now seen corresponding path program 1 times [2020-12-09 14:21:42,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:21:42,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252513148] [2020-12-09 14:21:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:21:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:21:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 14:21:42,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252513148] [2020-12-09 14:21:42,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541964684] [2020-12-09 14:21:42,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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 14:21:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:21:42,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 98 conjunts are in the unsatisfiable core [2020-12-09 14:21:42,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:21:43,626 WARN L197 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-09 14:21:44,458 WARN L197 SmtUtils]: Spent 795.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-09 14:21:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:21:45,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:21:53,381 WARN L197 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2020-12-09 14:21:57,038 WARN L197 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 43 [2020-12-09 14:22:06,763 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 59 [2020-12-09 14:22:25,667 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 62 [2020-12-09 14:22:27,404 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_downsweep_~n_15 Int) (v_ULTIMATE.start_upsweep_~a.offset_10 Int) (v_ULTIMATE.start_upsweep_~right~0_12 Int) (v_ULTIMATE.start_upsweep_~left~0_26 Int)) (let ((.cse3 (store (let ((.cse4 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base)) (.cse5 (+ v_ULTIMATE.start_upsweep_~a.offset_10 (* v_ULTIMATE.start_upsweep_~right~0_12 4)))) (store .cse4 .cse5 (+ (select .cse4 (+ v_ULTIMATE.start_upsweep_~a.offset_10 (* v_ULTIMATE.start_upsweep_~left~0_26 4))) (select .cse4 .cse5)))) (+ (* v_ULTIMATE.start_downsweep_~n_15 4) c_ULTIMATE.start_main_~a~0.offset (- 4)) 0)) (.cse2 (+ c_ULTIMATE.start_main_~a~0.offset 4))) (let ((.cse0 (select .cse3 .cse2))) (or (< v_ULTIMATE.start_downsweep_~n_15 c_ULTIMATE.start_main_~n~0) (< v_ULTIMATE.start_upsweep_~a.offset_10 c_ULTIMATE.start_main_~a~0.offset) (let ((.cse1 (store (store .cse3 .cse2 (+ .cse0 (select .cse3 c_ULTIMATE.start_main_~a~0.offset))) c_ULTIMATE.start_main_~a~0.offset .cse0))) (= (+ .cse0 (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse1) c_ULTIMATE.start_main_~a0~0.base) c_ULTIMATE.start_main_~a0~0.offset)) (select .cse1 .cse2))) (not (= .cse0 0)) (< v_ULTIMATE.start_upsweep_~left~0_26 0) (< v_ULTIMATE.start_upsweep_~right~0_12 (+ v_ULTIMATE.start_upsweep_~left~0_26 1)))))) is different from false [2020-12-09 14:22:32,034 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-09 14:22:34,564 WARN L234 Elim1Store]: Array PQE input equivalent to true [2020-12-09 14:22:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 2 times theorem prover too weak. 0 trivial. 2 not checked. [2020-12-09 14:22:34,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2139273517] [2020-12-09 14:22:34,575 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 14:22:34,576 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 14:22:34,576 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 14:22:34,576 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 14:22:34,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 14:22:34,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:34,601 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:34,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:34,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:35,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:35,100 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:35,146 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:35,158 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:35,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:35,208 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:35,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:35,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:35,889 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:35,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:35,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:35,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:35,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:36,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:36,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:36,059 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:36,169 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:36,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:22:36,766 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) 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 14:22:36,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 14:22:36,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 16, 17] total 36 [2020-12-09 14:22:36,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844442436] [2020-12-09 14:22:36,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-09 14:22:36,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 14:22:36,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-09 14:22:36,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=977, Unknown=19, NotChecked=66, Total=1260 [2020-12-09 14:22:36,769 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand 36 states. [2020-12-09 14:22:38,278 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 76 DAG size of output: 37 [2020-12-09 14:22:38,950 WARN L197 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 33 [2020-12-09 14:22:39,644 WARN L197 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2020-12-09 14:22:40,640 WARN L197 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-12-09 14:22:41,284 WARN L197 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2020-12-09 14:22:41,976 WARN L197 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2020-12-09 14:22:42,839 WARN L197 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 48 [2020-12-09 14:22:43,522 WARN L197 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2020-12-09 14:22:44,416 WARN L197 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2020-12-09 14:22:45,201 WARN L197 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-09 14:22:47,701 WARN L197 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2020-12-09 14:22:50,135 WARN L197 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2020-12-09 14:22:51,963 WARN L197 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2020-12-09 14:22:55,203 WARN L197 SmtUtils]: Spent 3.19 s on a formula simplification. DAG size of input: 103 DAG size of output: 95 [2020-12-09 14:22:57,097 WARN L197 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-12-09 14:22:57,871 WARN L197 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 101 [2020-12-09 14:23:01,335 WARN L197 SmtUtils]: Spent 3.41 s on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-12-09 14:23:02,329 WARN L197 SmtUtils]: Spent 940.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 103 [2020-12-09 14:23:04,179 WARN L197 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-12-09 14:23:06,098 WARN L197 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-12-09 14:23:07,574 WARN L197 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2020-12-09 14:23:08,892 WARN L197 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-12-09 14:23:10,752 WARN L197 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-12-09 14:23:11,743 WARN L197 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-12-09 14:23:13,136 WARN L197 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-09 14:23:13,833 WARN L197 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2020-12-09 14:23:15,183 WARN L197 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-09 14:23:15,900 WARN L197 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2020-12-09 14:23:16,627 WARN L197 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-12-09 14:23:17,919 WARN L197 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-12-09 14:23:18,669 WARN L197 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-12-09 14:23:19,965 WARN L197 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2020-12-09 14:23:20,762 WARN L197 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-09 14:23:21,718 WARN L197 SmtUtils]: Spent 886.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-09 14:23:23,015 WARN L197 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-09 14:23:23,744 WARN L197 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-09 14:23:25,058 WARN L197 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-09 14:23:25,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:23:25,065 INFO L93 Difference]: Finished difference Result 125 states and 169 transitions. [2020-12-09 14:23:25,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-09 14:23:25,066 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 19 [2020-12-09 14:23:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:23:25,067 INFO L225 Difference]: With dead ends: 125 [2020-12-09 14:23:25,068 INFO L226 Difference]: Without dead ends: 110 [2020-12-09 14:23:25,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 98.3s TimeCoverageRelationStatistics Valid=1442, Invalid=5023, Unknown=19, NotChecked=158, Total=6642 [2020-12-09 14:23:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-09 14:23:25,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 28. [2020-12-09 14:23:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 14:23:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-12-09 14:23:25,080 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 19 [2020-12-09 14:23:25,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:23:25,080 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-12-09 14:23:25,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-09 14:23:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-12-09 14:23:25,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 14:23:25,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:23:25,081 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:23:25,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2020-12-09 14:23:25,283 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:23:25,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:23:25,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1023545989, now seen corresponding path program 1 times [2020-12-09 14:23:25,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:23:25,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871188741] [2020-12-09 14:23:25,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:23:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 14:23:25,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871188741] [2020-12-09 14:23:25,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948316484] [2020-12-09 14:23:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:23:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:25,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 14:23:25,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:23:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 14:23:25,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:23:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 14:23:25,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1412248409] [2020-12-09 14:23:25,559 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 14:23:25,559 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 14:23:25,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 14:23:25,559 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 14:23:25,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 14:23:25,572 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:23:25,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:23:26,162 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:23:26,173 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:23:27,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:23:27,040 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:23:27,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:23:27,076 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:23:27,166 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:23:27,194 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:23:27,206 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:23:27,218 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:23:27,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:23:27,806 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) 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 14:23:27,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 14:23:27,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2020-12-09 14:23:27,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050182334] [2020-12-09 14:23:27,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-09 14:23:27,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 14:23:27,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-09 14:23:27,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-12-09 14:23:27,808 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 15 states. [2020-12-09 14:23:27,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:23:27,901 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2020-12-09 14:23:27,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 14:23:27,901 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-12-09 14:23:27,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:23:27,901 INFO L225 Difference]: With dead ends: 52 [2020-12-09 14:23:27,901 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 14:23:27,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-12-09 14:23:27,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 14:23:27,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-12-09 14:23:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 14:23:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-12-09 14:23:27,907 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 26 [2020-12-09 14:23:27,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:23:27,907 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-12-09 14:23:27,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-09 14:23:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-12-09 14:23:27,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 14:23:27,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:23:27,908 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:23:28,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:23:28,110 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:23:28,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:23:28,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1692535581, now seen corresponding path program 2 times [2020-12-09 14:23:28,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:23:28,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117559902] [2020-12-09 14:23:28,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:23:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-09 14:23:28,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117559902] [2020-12-09 14:23:28,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749471294] [2020-12-09 14:23:28,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:23:28,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 14:23:28,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 14:23:28,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 14:23:28,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:23:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-09 14:23:28,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:23:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-09 14:23:28,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 14:23:28,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [8] total 14 [2020-12-09 14:23:28,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623833853] [2020-12-09 14:23:28,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 14:23:28,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 14:23:28,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 14:23:28,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-12-09 14:23:28,422 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 8 states. [2020-12-09 14:23:28,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:23:28,530 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-12-09 14:23:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 14:23:28,531 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-09 14:23:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:23:28,532 INFO L225 Difference]: With dead ends: 53 [2020-12-09 14:23:28,532 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 14:23:28,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-12-09 14:23:28,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 14:23:28,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-09 14:23:28,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 14:23:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-12-09 14:23:28,540 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 26 [2020-12-09 14:23:28,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:23:28,540 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-12-09 14:23:28,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 14:23:28,540 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-12-09 14:23:28,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 14:23:28,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:23:28,541 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:23:28,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-12-09 14:23:28,743 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:23:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:23:28,744 INFO L82 PathProgramCache]: Analyzing trace with hash -895661021, now seen corresponding path program 2 times [2020-12-09 14:23:28,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:23:28,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113414985] [2020-12-09 14:23:28,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:23:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-09 14:23:28,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113414985] [2020-12-09 14:23:28,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380798149] [2020-12-09 14:23:28,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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 14:23:29,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 14:23:29,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 14:23:29,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 14:23:29,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:23:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-09 14:23:29,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:23:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-09 14:23:29,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [18073399] [2020-12-09 14:23:29,207 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 14:23:29,208 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 14:23:29,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 14:23:29,208 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 14:23:29,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 14:23:29,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:23:29,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:23:29,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-12-09 14:23:29,549 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: variable got div captured at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:426) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:305) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:319) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:223) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:190) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:174) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:141) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryToEliminate(DualJunctionDer.java:119) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:776) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:739) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:656) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:358) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.convert(QuantifierPusher.java:217) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.eliminate(QuantifierPusher.java:151) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.eliminate(QuantifierPusher.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elimPushPull(PartialQuantifierElimination.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elimPushPull(PartialQuantifierElimination.java:202) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:139) 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.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1133) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) 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 14:23:29,555 INFO L168 Benchmark]: Toolchain (without parser) took 124223.99 ms. Allocated memory was 73.4 MB in the beginning and 176.2 MB in the end (delta: 102.8 MB). Free memory was 38.9 MB in the beginning and 129.3 MB in the end (delta: -90.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 16.1 GB. [2020-12-09 14:23:29,556 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 73.4 MB. Free memory is still 55.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 14:23:29,557 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.30 ms. Allocated memory was 73.4 MB in the beginning and 100.7 MB in the end (delta: 27.3 MB). Free memory was 38.7 MB in the beginning and 76.0 MB in the end (delta: -37.3 MB). Peak memory consumption was 3.6 MB. Max. memory is 16.1 GB. [2020-12-09 14:23:29,558 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.27 ms. Allocated memory is still 100.7 MB. Free memory was 76.0 MB in the beginning and 74.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 14:23:29,559 INFO L168 Benchmark]: Boogie Preprocessor took 29.85 ms. Allocated memory is still 100.7 MB. Free memory was 74.0 MB in the beginning and 72.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 14:23:29,560 INFO L168 Benchmark]: RCFGBuilder took 471.95 ms. Allocated memory is still 100.7 MB. Free memory was 72.2 MB in the beginning and 58.9 MB in the end (delta: 13.3 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. [2020-12-09 14:23:29,561 INFO L168 Benchmark]: TraceAbstraction took 123494.59 ms. Allocated memory was 100.7 MB in the beginning and 176.2 MB in the end (delta: 75.5 MB). Free memory was 58.5 MB in the beginning and 129.3 MB in the end (delta: -70.8 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. [2020-12-09 14:23:29,566 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 73.4 MB. Free memory is still 55.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 192.30 ms. Allocated memory was 73.4 MB in the beginning and 100.7 MB in the end (delta: 27.3 MB). Free memory was 38.7 MB in the beginning and 76.0 MB in the end (delta: -37.3 MB). Peak memory consumption was 3.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.27 ms. Allocated memory is still 100.7 MB. Free memory was 76.0 MB in the beginning and 74.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.85 ms. Allocated memory is still 100.7 MB. Free memory was 74.0 MB in the beginning and 72.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 471.95 ms. Allocated memory is still 100.7 MB. Free memory was 72.2 MB in the beginning and 58.9 MB in the end (delta: 13.3 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 123494.59 ms. Allocated memory was 100.7 MB in the beginning and 176.2 MB in the end (delta: 75.5 MB). Free memory was 58.5 MB in the beginning and 129.3 MB in the end (delta: -70.8 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: variable got div captured de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: variable got div captured: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:426) 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 14:23:31,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 14:23:31,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 14:23:31,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 14:23:31,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 14:23:31,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 14:23:31,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 14:23:31,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 14:23:31,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 14:23:31,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 14:23:31,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 14:23:31,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 14:23:31,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 14:23:31,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 14:23:31,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 14:23:31,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 14:23:31,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 14:23:31,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 14:23:31,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 14:23:31,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 14:23:31,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 14:23:31,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 14:23:31,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 14:23:31,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 14:23:31,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 14:23:31,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 14:23:31,169 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 14:23:31,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 14:23:31,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 14:23:31,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 14:23:31,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 14:23:31,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 14:23:31,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 14:23:31,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 14:23:31,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 14:23:31,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 14:23:31,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 14:23:31,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 14:23:31,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 14:23:31,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 14:23:31,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 14:23:31,179 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 14:23:31,203 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 14:23:31,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 14:23:31,204 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 14:23:31,204 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 14:23:31,205 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 14:23:31,205 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 14:23:31,205 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 14:23:31,205 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 14:23:31,205 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 14:23:31,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 14:23:31,206 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 14:23:31,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 14:23:31,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 14:23:31,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 14:23:31,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 14:23:31,207 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 14:23:31,208 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 14:23:31,208 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 14:23:31,208 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 14:23:31,208 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 14:23:31,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 14:23:31,208 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 14:23:31,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 14:23:31,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 14:23:31,209 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 14:23:31,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 14:23:31,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 14:23:31,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 14:23:31,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 14:23:31,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 14:23:31,210 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 14:23:31,211 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 14:23:31,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 14:23:31,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 14:23:31,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 14:23:31,211 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_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1bf0d13b0acf89aecbbf410d877da8d9010361f [2020-12-09 14:23:31,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 14:23:31,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 14:23:31,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 14:23:31,460 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 14:23:31,461 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 14:23:31,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2020-12-09 14:23:31,500 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/data/e78466ec5/16ebcab1961345deaf3d8d526490f4ec/FLAG9da7d0dd7 [2020-12-09 14:23:31,877 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 14:23:31,877 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/sv-benchmarks/c/verifythis/prefixsum_iter.c [2020-12-09 14:23:31,883 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/data/e78466ec5/16ebcab1961345deaf3d8d526490f4ec/FLAG9da7d0dd7 [2020-12-09 14:23:31,892 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/data/e78466ec5/16ebcab1961345deaf3d8d526490f4ec [2020-12-09 14:23:31,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 14:23:31,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 14:23:31,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 14:23:31,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 14:23:31,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 14:23:31,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:23:31" (1/1) ... [2020-12-09 14:23:31,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7599120a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:23:31, skipping insertion in model container [2020-12-09 14:23:31,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:23:31" (1/1) ... [2020-12-09 14:23:31,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 14:23:31,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 14:23:32,032 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_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2020-12-09 14:23:32,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 14:23:32,080 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 14:23:32,096 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_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2020-12-09 14:23:32,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 14:23:32,128 INFO L208 MainTranslator]: Completed translation [2020-12-09 14:23:32,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:23:32 WrapperNode [2020-12-09 14:23:32,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 14:23:32,130 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 14:23:32,130 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 14:23:32,130 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 14:23:32,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:23:32" (1/1) ... [2020-12-09 14:23:32,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:23:32" (1/1) ... [2020-12-09 14:23:32,169 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 14:23:32,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 14:23:32,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 14:23:32,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 14:23:32,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:23:32" (1/1) ... [2020-12-09 14:23:32,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:23:32" (1/1) ... [2020-12-09 14:23:32,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:23:32" (1/1) ... [2020-12-09 14:23:32,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:23:32" (1/1) ... [2020-12-09 14:23:32,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:23:32" (1/1) ... [2020-12-09 14:23:32,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:23:32" (1/1) ... [2020-12-09 14:23:32,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:23:32" (1/1) ... [2020-12-09 14:23:32,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 14:23:32,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 14:23:32,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 14:23:32,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 14:23:32,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:23:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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 14:23:32,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 14:23:32,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 14:23:32,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 14:23:32,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 14:23:32,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 14:23:32,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 14:23:32,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 14:23:32,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-09 14:23:32,569 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 14:23:32,569 INFO L299 CfgBuilder]: Removed 29 assume(true) statements. [2020-12-09 14:23:32,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:23:32 BoogieIcfgContainer [2020-12-09 14:23:32,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 14:23:32,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 14:23:32,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 14:23:32,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 14:23:32,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 02:23:31" (1/3) ... [2020-12-09 14:23:32,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2216b042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:23:32, skipping insertion in model container [2020-12-09 14:23:32,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:23:32" (2/3) ... [2020-12-09 14:23:32,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2216b042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:23:32, skipping insertion in model container [2020-12-09 14:23:32,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:23:32" (3/3) ... [2020-12-09 14:23:32,576 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2020-12-09 14:23:32,586 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 14:23:32,588 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 14:23:32,596 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 14:23:32,613 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 14:23:32,613 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 14:23:32,613 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 14:23:32,613 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 14:23:32,613 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 14:23:32,613 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 14:23:32,613 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 14:23:32,613 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 14:23:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-09 14:23:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-09 14:23:32,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:23:32,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:23:32,627 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:23:32,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:23:32,631 INFO L82 PathProgramCache]: Analyzing trace with hash -846101861, now seen corresponding path program 1 times [2020-12-09 14:23:32,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:23:32,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098423826] [2020-12-09 14:23:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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 14:23:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:32,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 14:23:32,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:23:32,773 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 14:23:32,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 14:23:32,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098423826] [2020-12-09 14:23:32,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:23:32,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 14:23:32,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665466987] [2020-12-09 14:23:32,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 14:23:32,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:23:32,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 14:23:32,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 14:23:32,788 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-12-09 14:23:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:23:32,801 INFO L93 Difference]: Finished difference Result 63 states and 94 transitions. [2020-12-09 14:23:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 14:23:32,802 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-12-09 14:23:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:23:32,807 INFO L225 Difference]: With dead ends: 63 [2020-12-09 14:23:32,807 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 14:23:32,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 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 14:23:32,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 14:23:32,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-09 14:23:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 14:23:32,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-09 14:23:32,836 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2020-12-09 14:23:32,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:23:32,837 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-09 14:23:32,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 14:23:32,837 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-09 14:23:32,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-09 14:23:32,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:23:32,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:23:33,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 14:23:33,038 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:23:33,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:23:33,039 INFO L82 PathProgramCache]: Analyzing trace with hash 748804443, now seen corresponding path program 1 times [2020-12-09 14:23:33,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:23:33,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264315107] [2020-12-09 14:23:33,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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 14:23:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:33,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 14:23:33,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:23:33,254 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 14:23:33,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 14:23:33,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264315107] [2020-12-09 14:23:33,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:23:33,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-09 14:23:33,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898891841] [2020-12-09 14:23:33,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 14:23:33,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:23:33,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 14:23:33,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-09 14:23:33,257 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 9 states. [2020-12-09 14:23:33,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:23:33,653 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2020-12-09 14:23:33,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 14:23:33,654 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-09 14:23:33,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:23:33,655 INFO L225 Difference]: With dead ends: 72 [2020-12-09 14:23:33,655 INFO L226 Difference]: Without dead ends: 56 [2020-12-09 14:23:33,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2020-12-09 14:23:33,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-09 14:23:33,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 37. [2020-12-09 14:23:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-09 14:23:33,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-12-09 14:23:33,667 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 21 [2020-12-09 14:23:33,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:23:33,667 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-12-09 14:23:33,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 14:23:33,667 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-12-09 14:23:33,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 14:23:33,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:23:33,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:23:33,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 14:23:33,869 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:23:33,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:23:33,870 INFO L82 PathProgramCache]: Analyzing trace with hash 337545587, now seen corresponding path program 1 times [2020-12-09 14:23:33,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:23:33,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542408161] [2020-12-09 14:23:33,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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 14:23:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:34,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 14:23:34,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:23:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:23:34,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:23:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:23:34,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542408161] [2020-12-09 14:23:34,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [672809562] [2020-12-09 14:23:34,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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 14:23:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:34,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 14:23:34,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:23:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:23:34,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:23:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 14:23:34,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 14:23:34,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 8, 7] total 24 [2020-12-09 14:23:34,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314803824] [2020-12-09 14:23:34,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 14:23:34,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:23:34,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 14:23:34,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2020-12-09 14:23:34,575 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 5 states. [2020-12-09 14:23:34,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:23:34,661 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-12-09 14:23:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 14:23:34,662 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-12-09 14:23:34,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:23:34,662 INFO L225 Difference]: With dead ends: 55 [2020-12-09 14:23:34,662 INFO L226 Difference]: Without dead ends: 38 [2020-12-09 14:23:34,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-12-09 14:23:34,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-09 14:23:34,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2020-12-09 14:23:34,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-09 14:23:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-09 14:23:34,667 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 22 [2020-12-09 14:23:34,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:23:34,667 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-09 14:23:34,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 14:23:34,667 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-09 14:23:34,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 14:23:34,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:23:34,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:23:35,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,5 cvc4 --incremental --print-success --lang smt [2020-12-09 14:23:35,070 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:23:35,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:23:35,072 INFO L82 PathProgramCache]: Analyzing trace with hash 400112637, now seen corresponding path program 1 times [2020-12-09 14:23:35,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:23:35,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715902870] [2020-12-09 14:23:35,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 14:23:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:35,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-09 14:23:35,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:23:35,272 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 14:23:35,273 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 14:23:35,278 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 14:23:35,278 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 14:23:35,279 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-09 14:23:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 14:23:35,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 14:23:35,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715902870] [2020-12-09 14:23:35,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:23:35,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-09 14:23:35,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099066965] [2020-12-09 14:23:35,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 14:23:35,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:23:35,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 14:23:35,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-12-09 14:23:35,337 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 11 states. [2020-12-09 14:23:35,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:23:35,938 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2020-12-09 14:23:35,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 14:23:35,939 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-12-09 14:23:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:23:35,940 INFO L225 Difference]: With dead ends: 73 [2020-12-09 14:23:35,940 INFO L226 Difference]: Without dead ends: 71 [2020-12-09 14:23:35,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2020-12-09 14:23:35,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-09 14:23:35,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 52. [2020-12-09 14:23:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-09 14:23:35,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2020-12-09 14:23:35,947 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 23 [2020-12-09 14:23:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:23:35,948 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2020-12-09 14:23:35,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 14:23:35,948 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2020-12-09 14:23:35,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 14:23:35,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:23:35,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:23:36,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 14:23:36,150 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:23:36,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:23:36,151 INFO L82 PathProgramCache]: Analyzing trace with hash 317343253, now seen corresponding path program 1 times [2020-12-09 14:23:36,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:23:36,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930477711] [2020-12-09 14:23:36,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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 14:23:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:36,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 14:23:36,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:23:36,440 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 14:23:36,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:23:36,575 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 14:23:36,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930477711] [2020-12-09 14:23:36,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1075082224] [2020-12-09 14:23:36,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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 14:23:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:36,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 14:23:36,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:23:36,763 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 14:23:36,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:23:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:23:36,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975005818] [2020-12-09 14:23:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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 14:23:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:36,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 14:23:36,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:23:37,082 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 14:23:37,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:23:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:23:37,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 14:23:37,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7, 7, 9, 10] total 36 [2020-12-09 14:23:37,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282811537] [2020-12-09 14:23:37,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-09 14:23:37,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:23:37,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-09 14:23:37,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2020-12-09 14:23:37,315 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 36 states. [2020-12-09 14:23:39,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:23:39,422 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2020-12-09 14:23:39,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-09 14:23:39,422 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 24 [2020-12-09 14:23:39,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:23:39,423 INFO L225 Difference]: With dead ends: 120 [2020-12-09 14:23:39,423 INFO L226 Difference]: Without dead ends: 104 [2020-12-09 14:23:39,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=775, Invalid=2765, Unknown=0, NotChecked=0, Total=3540 [2020-12-09 14:23:39,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-09 14:23:39,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 59. [2020-12-09 14:23:39,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-09 14:23:39,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-12-09 14:23:39,433 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 24 [2020-12-09 14:23:39,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:23:39,433 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-12-09 14:23:39,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-09 14:23:39,433 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-12-09 14:23:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 14:23:39,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:23:39,434 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:23:40,035 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 14:23:40,037 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:23:40,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:23:40,039 INFO L82 PathProgramCache]: Analyzing trace with hash -670891724, now seen corresponding path program 1 times [2020-12-09 14:23:40,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:23:40,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636359836] [2020-12-09 14:23:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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 14:23:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:40,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 14:23:40,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:23:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 14:23:40,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:23:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 14:23:40,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636359836] [2020-12-09 14:23:40,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [702631806] [2020-12-09 14:23:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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 14:23:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:40,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 14:23:40,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:23:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:23:40,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:23:40,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:23:40,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479013006] [2020-12-09 14:23:40,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/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 14:23:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:40,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 14:23:40,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:23:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:23:40,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:23:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:23:40,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 14:23:40,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8, 8, 11, 9] total 24 [2020-12-09 14:23:40,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857243938] [2020-12-09 14:23:40,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-09 14:23:40,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:23:40,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-09 14:23:40,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-12-09 14:23:40,845 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 24 states. [2020-12-09 14:23:41,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:23:41,611 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2020-12-09 14:23:41,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-09 14:23:41,611 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-12-09 14:23:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:23:41,612 INFO L225 Difference]: With dead ends: 94 [2020-12-09 14:23:41,612 INFO L226 Difference]: Without dead ends: 64 [2020-12-09 14:23:41,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 128 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=285, Invalid=1121, Unknown=0, NotChecked=0, Total=1406 [2020-12-09 14:23:41,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-09 14:23:41,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-12-09 14:23:41,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-09 14:23:41,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-12-09 14:23:41,619 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 27 [2020-12-09 14:23:41,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:23:41,620 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-12-09 14:23:41,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-09 14:23:41,620 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-12-09 14:23:41,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 14:23:41,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:23:41,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:23:42,222 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 14:23:42,223 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:23:42,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:23:42,224 INFO L82 PathProgramCache]: Analyzing trace with hash -421377874, now seen corresponding path program 1 times [2020-12-09 14:23:42,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:23:42,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560786921] [2020-12-09 14:23:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-12-09 14:23:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:42,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 14:23:42,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:23:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 14:23:42,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 14:23:42,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560786921] [2020-12-09 14:23:42,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:23:42,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 14:23:42,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089791082] [2020-12-09 14:23:42,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 14:23:42,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:23:42,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 14:23:42,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 14:23:42,341 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 5 states. [2020-12-09 14:23:42,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:23:42,444 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2020-12-09 14:23:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 14:23:42,444 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-12-09 14:23:42,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:23:42,445 INFO L225 Difference]: With dead ends: 81 [2020-12-09 14:23:42,445 INFO L226 Difference]: Without dead ends: 67 [2020-12-09 14:23:42,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 14:23:42,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-09 14:23:42,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2020-12-09 14:23:42,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-09 14:23:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-12-09 14:23:42,454 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 27 [2020-12-09 14:23:42,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:23:42,455 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-12-09 14:23:42,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 14:23:42,455 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-12-09 14:23:42,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-09 14:23:42,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:23:42,455 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:23:42,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-12-09 14:23:42,657 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:23:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:23:42,658 INFO L82 PathProgramCache]: Analyzing trace with hash -90552212, now seen corresponding path program 1 times [2020-12-09 14:23:42,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:23:42,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744036659] [2020-12-09 14:23:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-12-09 14:23:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:42,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 14:23:42,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:23:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 14:23:42,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:23:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 14:23:43,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744036659] [2020-12-09 14:23:43,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1884786826] [2020-12-09 14:23:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt [2020-12-09 14:23:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:43,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 14:23:43,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:23:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:23:43,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:23:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 14:23:43,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466258752] [2020-12-09 14:23:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:23:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:23:43,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 14:23:43,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:23:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 14:23:43,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:23:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 14:23:45,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 14:23:45,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 6, 6] total 39 [2020-12-09 14:23:45,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930878416] [2020-12-09 14:23:45,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-09 14:23:45,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:23:45,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-09 14:23:45,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2020-12-09 14:23:45,595 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 39 states. [2020-12-09 14:23:51,085 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-12-09 14:23:51,295 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2020-12-09 14:23:52,500 WARN L197 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-12-09 14:23:54,258 WARN L197 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-12-09 14:23:55,160 WARN L197 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-12-09 14:23:56,798 WARN L197 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-12-09 14:23:58,266 WARN L197 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2020-12-09 14:23:58,877 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-12-09 14:24:00,452 WARN L197 SmtUtils]: Spent 930.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2020-12-09 14:24:01,249 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-09 14:24:01,984 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-12-09 14:24:04,233 WARN L197 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2020-12-09 14:24:05,671 WARN L197 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2020-12-09 14:24:06,565 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-09 14:24:07,601 WARN L197 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-12-09 14:24:08,160 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2020-12-09 14:24:10,668 WARN L197 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2020-12-09 14:24:11,892 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-09 14:24:12,734 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-09 14:24:13,916 WARN L197 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-12-09 14:24:14,852 WARN L197 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2020-12-09 14:24:16,064 WARN L197 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-09 14:24:17,214 WARN L197 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2020-12-09 14:24:18,728 WARN L197 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-12-09 14:24:20,463 WARN L197 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2020-12-09 14:24:21,369 WARN L197 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2020-12-09 14:24:21,944 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-09 14:24:23,061 WARN L197 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-12-09 14:24:24,910 WARN L197 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2020-12-09 14:24:25,902 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-09 14:24:26,467 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-09 14:24:28,005 WARN L197 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-12-09 14:24:29,134 WARN L197 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-12-09 14:24:30,264 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-09 14:24:31,891 WARN L197 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-12-09 14:24:32,752 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-12-09 14:24:33,701 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-12-09 14:24:35,000 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-12-09 14:24:35,736 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2020-12-09 14:24:37,142 WARN L197 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-12-09 14:24:37,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:24:37,797 INFO L93 Difference]: Finished difference Result 375 states and 489 transitions. [2020-12-09 14:24:37,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-12-09 14:24:37,799 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 29 [2020-12-09 14:24:37,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:24:37,801 INFO L225 Difference]: With dead ends: 375 [2020-12-09 14:24:37,801 INFO L226 Difference]: Without dead ends: 340 [2020-12-09 14:24:37,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4956 ImplicationChecksByTransitivity, 48.2s TimeCoverageRelationStatistics Valid=2728, Invalid=14302, Unknown=0, NotChecked=0, Total=17030 [2020-12-09 14:24:37,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-12-09 14:24:37,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 104. [2020-12-09 14:24:37,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-09 14:24:37,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2020-12-09 14:24:37,819 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 29 [2020-12-09 14:24:37,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:24:37,819 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2020-12-09 14:24:37,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-09 14:24:37,820 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2020-12-09 14:24:37,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-09 14:24:37,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:24:37,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:24:38,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 mathsat -unsat_core_generation=3,15 cvc4 --incremental --print-success --lang smt [2020-12-09 14:24:38,423 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:24:38,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:24:38,424 INFO L82 PathProgramCache]: Analyzing trace with hash -43549283, now seen corresponding path program 1 times [2020-12-09 14:24:38,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:24:38,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941652656] [2020-12-09 14:24:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2020-12-09 14:24:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:24:38,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 14:24:38,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:24:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 14:24:38,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 14:24:38,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941652656] [2020-12-09 14:24:38,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:24:38,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-09 14:24:38,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305441598] [2020-12-09 14:24:38,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 14:24:38,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:24:38,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 14:24:38,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-09 14:24:38,618 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand 9 states. [2020-12-09 14:24:38,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:24:38,998 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2020-12-09 14:24:38,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 14:24:38,998 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-12-09 14:24:38,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:24:38,999 INFO L225 Difference]: With dead ends: 106 [2020-12-09 14:24:38,999 INFO L226 Difference]: Without dead ends: 66 [2020-12-09 14:24:38,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-09 14:24:38,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-09 14:24:39,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-09 14:24:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-09 14:24:39,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2020-12-09 14:24:39,006 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 31 [2020-12-09 14:24:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:24:39,006 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2020-12-09 14:24:39,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 14:24:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2020-12-09 14:24:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-09 14:24:39,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:24:39,007 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:24:39,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 mathsat -unsat_core_generation=3 [2020-12-09 14:24:39,208 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:24:39,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:24:39,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1848545290, now seen corresponding path program 1 times [2020-12-09 14:24:39,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:24:39,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777357668] [2020-12-09 14:24:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2020-12-09 14:24:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:24:39,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 14:24:39,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:24:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 14:24:39,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:24:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 14:24:42,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777357668] [2020-12-09 14:24:42,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [254111786] [2020-12-09 14:24:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt [2020-12-09 14:24:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:24:42,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 14:24:42,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:24:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 14:24:43,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:24:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 14:24:44,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53374404] [2020-12-09 14:24:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:24:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:24:44,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 14:24:44,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:24:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 14:24:45,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:24:48,712 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-12-09 14:24:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 14:24:48,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 14:24:48,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14, 14, 11, 9] total 50 [2020-12-09 14:24:48,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511594243] [2020-12-09 14:24:48,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-09 14:24:48,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:24:48,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-09 14:24:48,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2096, Unknown=0, NotChecked=0, Total=2450 [2020-12-09 14:24:48,725 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand 50 states. [2020-12-09 14:24:54,047 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 25 [2020-12-09 14:24:54,652 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 27 [2020-12-09 14:24:55,020 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2020-12-09 14:24:55,548 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-12-09 14:24:55,738 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2020-12-09 14:24:56,489 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-12-09 14:24:56,843 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 32 [2020-12-09 14:24:57,509 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 34 [2020-12-09 14:24:57,867 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2020-12-09 14:24:58,278 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-12-09 14:24:59,566 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2020-12-09 14:25:01,408 WARN L197 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-12-09 14:25:03,937 WARN L197 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2020-12-09 14:25:06,971 WARN L197 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-09 14:25:10,104 WARN L197 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-12-09 14:25:11,529 WARN L197 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2020-12-09 14:25:12,640 WARN L197 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-12-09 14:25:13,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:25:13,369 INFO L93 Difference]: Finished difference Result 202 states and 253 transitions. [2020-12-09 14:25:13,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-09 14:25:13,376 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 33 [2020-12-09 14:25:13,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:25:13,377 INFO L225 Difference]: With dead ends: 202 [2020-12-09 14:25:13,377 INFO L226 Difference]: Without dead ends: 175 [2020-12-09 14:25:13,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=1860, Invalid=7070, Unknown=0, NotChecked=0, Total=8930 [2020-12-09 14:25:13,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-09 14:25:13,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 83. [2020-12-09 14:25:13,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-09 14:25:13,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-12-09 14:25:13,391 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 33 [2020-12-09 14:25:13,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:25:13,391 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-12-09 14:25:13,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-09 14:25:13,391 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-12-09 14:25:13,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-09 14:25:13,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:25:13,392 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:25:13,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 mathsat -unsat_core_generation=3,19 cvc4 --incremental --print-success --lang smt,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:25:13,995 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:25:13,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:25:13,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1396885975, now seen corresponding path program 1 times [2020-12-09 14:25:13,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:25:13,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779612491] [2020-12-09 14:25:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/mathsat Starting monitored process 21 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with mathsat -unsat_core_generation=3 [2020-12-09 14:25:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:25:14,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-09 14:25:14,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:25:14,361 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 14:25:14,361 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 14:25:14,387 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 14:25:14,388 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 14:25:14,388 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:35 [2020-12-09 14:25:14,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 14:25:14,533 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 14:25:14,536 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 14:25:14,536 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 39 [2020-12-09 14:25:14,537 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 14:25:14,560 INFO L625 ElimStorePlain]: treesize reduction 18, result has 53.8 percent of original size [2020-12-09 14:25:14,562 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 14:25:14,562 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:11 [2020-12-09 14:25:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 14:25:14,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:25:15,246 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 106 treesize of output 98 [2020-12-09 14:25:15,469 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-12-09 14:25:15,470 INFO L348 Elim1Store]: treesize reduction 15, result has 76.9 percent of original size [2020-12-09 14:25:15,470 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1544 treesize of output 1325 [2020-12-09 14:25:15,476 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,477 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,480 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,481 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,482 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,483 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,484 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,484 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,485 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,485 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,486 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,487 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,488 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,491 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,491 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,492 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:15,494 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,495 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,496 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,497 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,498 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,500 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,501 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,501 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,502 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,502 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,503 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,504 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,505 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,507 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,508 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,509 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:15,510 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,511 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,512 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,513 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,513 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,516 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:15,516 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:15,517 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,518 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,518 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,520 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,520 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,521 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,522 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:15,523 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,523 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,524 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:15,525 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,526 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,527 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,528 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,533 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,534 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:15,535 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,535 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,536 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,537 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,538 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,538 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,539 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:15,540 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,540 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,541 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:15,542 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,544 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,544 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,545 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,546 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,548 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:15,548 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:15,549 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 14:25:15,550 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:15,550 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:15,551 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:15,552 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,553 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:15,554 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,556 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:15,557 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,558 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:15,559 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,560 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,560 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,560 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,561 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,561 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,562 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,562 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,563 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,565 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,566 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,566 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:15,568 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,568 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,569 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,570 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,571 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,573 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,573 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,574 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,574 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,575 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,576 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:15,577 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,577 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,578 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,580 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,580 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,581 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,583 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:15,583 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:15,584 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:15,585 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,586 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:15,587 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,588 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,589 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,590 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,590 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,591 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,591 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,592 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,592 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,593 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,595 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,596 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,596 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:15,597 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,598 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,599 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,600 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:15,600 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,603 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,603 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,603 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:15,604 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,604 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:15,604 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 14:25:15,605 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-12-09 14:25:15,605 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 14:25:15,605 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:15,606 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,606 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:15,607 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:15,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779612491] [2020-12-09 14:25:15,608 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-12-09 14:25:15,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [250418844] [2020-12-09 14:25:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/cvc4 Starting monitored process 22 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4 --incremental --print-success --lang smt [2020-12-09 14:25:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:25:15,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-09 14:25:15,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:25:16,324 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 14:25:16,325 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 14:25:16,348 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 14:25:16,349 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 14:25:16,349 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:35 [2020-12-09 14:25:16,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 14:25:16,365 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 14:25:16,368 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 14:25:16,368 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 39 [2020-12-09 14:25:16,369 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 14:25:16,391 INFO L625 ElimStorePlain]: treesize reduction 18, result has 53.8 percent of original size [2020-12-09 14:25:16,393 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 14:25:16,394 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:11 [2020-12-09 14:25:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:25:16,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:25:16,420 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 106 treesize of output 98 [2020-12-09 14:25:16,627 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-12-09 14:25:16,627 INFO L348 Elim1Store]: treesize reduction 15, result has 76.9 percent of original size [2020-12-09 14:25:16,628 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1516 treesize of output 1297 [2020-12-09 14:25:16,632 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,633 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,633 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,633 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,635 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,636 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,636 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,637 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,637 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:16,638 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,639 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,639 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,639 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:16,640 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,641 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,641 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:16,641 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,643 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,644 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:16,644 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,645 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,646 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:16,646 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,647 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,647 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 14:25:16,648 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,649 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:16,649 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,650 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,651 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,651 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,652 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,652 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,653 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,653 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 14:25:16,654 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,654 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:16,654 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,655 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,656 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 14:25:16,656 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,657 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:16,658 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,659 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:16,659 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,660 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,661 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 14:25:16,661 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-12-09 14:25:16,662 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 14:25:16,662 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 14:25:16,663 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 14:25:16,663 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,664 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 14:25:16,665 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,666 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 14:25:16,667 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,668 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,669 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,670 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,671 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,671 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 14:25:16,671 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,672 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:16,672 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,673 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,674 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 14:25:16,674 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,675 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:16,676 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,677 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:16,677 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,678 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,678 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,679 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,680 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:16,680 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,681 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,681 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,682 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:16,682 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,683 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,684 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:16,684 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,685 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,686 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:16,687 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,687 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,688 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:16,688 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,689 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,690 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 14:25:16,690 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,691 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:16,692 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,693 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,693 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,694 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,695 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,695 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:16,695 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,696 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,697 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 14:25:16,698 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 14:25:16,698 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 14:25:16,699 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 14:25:16,699 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,700 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 14:25:16,701 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,702 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,702 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:16,703 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,704 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,705 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,705 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:16,706 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,706 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,708 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,708 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,708 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:16,709 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,710 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,710 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,711 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:16,711 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,712 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,712 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:16,713 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,714 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,714 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:16,715 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,716 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,717 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:16,717 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,718 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,718 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 14:25:16,719 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,720 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 14:25:16,720 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,722 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:16,722 INFO L639 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-12-09 14:25:16,722 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,723 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,723 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,724 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,724 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,725 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,725 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,727 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,727 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,728 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,728 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,729 INFO L639 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-12-09 14:25:16,729 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,730 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,730 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:16,731 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,731 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,732 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,732 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,733 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,734 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,734 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,735 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,735 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,736 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,737 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,737 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,738 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,738 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,739 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,740 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,740 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,741 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,742 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:16,745 INFO L639 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-12-09 14:25:16,745 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:16,746 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-12-09 14:25:16,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177394510] [2020-12-09 14:25:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e47964f-7c67-4fc3-8dc5-097ccdd02c35/bin/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:25:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:25:16,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-09 14:25:16,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:25:17,789 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 14:25:17,789 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 14:25:17,812 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 14:25:17,813 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 14:25:17,813 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:37 [2020-12-09 14:25:18,151 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 14:25:18,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 14:25:18,154 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 14:25:18,155 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 39 [2020-12-09 14:25:18,156 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 14:25:18,183 INFO L625 ElimStorePlain]: treesize reduction 21, result has 55.3 percent of original size [2020-12-09 14:25:18,184 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 14:25:18,184 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:28 [2020-12-09 14:25:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 14:25:18,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:25:19,397 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 106 treesize of output 98 [2020-12-09 14:25:19,682 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-12-09 14:25:19,682 INFO L348 Elim1Store]: treesize reduction 15, result has 76.9 percent of original size [2020-12-09 14:25:19,683 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 764 treesize of output 679 [2020-12-09 14:25:19,686 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:19,687 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:19,688 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 14:25:19,688 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:19,688 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:19,689 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:19,689 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:25:19,690 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:19,690 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:19,691 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 14:25:19,691 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 14:25:19,691 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:19,692 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 14:25:19,692 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-12-09 14:25:19,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:25:19,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 14:25:19,692 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2020-12-09 14:25:19,692 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 14:25:20,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 mathsat -unsat_core_generation=3,22 cvc4 --incremental --print-success --lang smt,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:25:20,314 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 14:25:20,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 02:25:20 BoogieIcfgContainer [2020-12-09 14:25:20,315 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 14:25:20,315 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 14:25:20,315 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 14:25:20,315 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 14:25:20,315 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:23:32" (3/4) ... [2020-12-09 14:25:20,318 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 14:25:20,318 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 14:25:20,319 INFO L168 Benchmark]: Toolchain (without parser) took 108423.26 ms. Allocated memory was 75.5 MB in the beginning and 119.5 MB in the end (delta: 44.0 MB). Free memory was 41.0 MB in the beginning and 41.8 MB in the end (delta: -825.5 kB). Peak memory consumption was 46.7 MB. Max. memory is 16.1 GB. [2020-12-09 14:25:20,319 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 75.5 MB. Free memory is still 57.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 14:25:20,319 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.85 ms. Allocated memory is still 75.5 MB. Free memory was 40.8 MB in the beginning and 57.3 MB in the end (delta: -16.5 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. [2020-12-09 14:25:20,319 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.48 ms. Allocated memory is still 75.5 MB. Free memory was 57.1 MB in the beginning and 55.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 14:25:20,320 INFO L168 Benchmark]: Boogie Preprocessor took 32.11 ms. Allocated memory is still 75.5 MB. Free memory was 55.2 MB in the beginning and 53.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 14:25:20,320 INFO L168 Benchmark]: RCFGBuilder took 367.57 ms. Allocated memory was 75.5 MB in the beginning and 98.6 MB in the end (delta: 23.1 MB). Free memory was 53.4 MB in the beginning and 75.6 MB in the end (delta: -22.1 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. [2020-12-09 14:25:20,320 INFO L168 Benchmark]: TraceAbstraction took 107743.18 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 75.2 MB in the beginning and 41.8 MB in the end (delta: 33.3 MB). Peak memory consumption was 53.0 MB. Max. memory is 16.1 GB. [2020-12-09 14:25:20,321 INFO L168 Benchmark]: Witness Printer took 2.96 ms. Allocated memory is still 119.5 MB. Free memory is still 41.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 14:25:20,323 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 75.5 MB. Free memory is still 57.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 232.85 ms. Allocated memory is still 75.5 MB. Free memory was 40.8 MB in the beginning and 57.3 MB in the end (delta: -16.5 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.48 ms. Allocated memory is still 75.5 MB. Free memory was 57.1 MB in the beginning and 55.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.11 ms. Allocated memory is still 75.5 MB. Free memory was 55.2 MB in the beginning and 53.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 367.57 ms. Allocated memory was 75.5 MB in the beginning and 98.6 MB in the end (delta: 23.1 MB). Free memory was 53.4 MB in the beginning and 75.6 MB in the end (delta: -22.1 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 107743.18 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 75.2 MB in the beginning and 41.8 MB in the end (delta: 33.3 MB). Peak memory consumption was 53.0 MB. Max. memory is 16.1 GB. * Witness Printer took 2.96 ms. Allocated memory is still 119.5 MB. Free memory is still 41.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L61] int n = __VERIFIER_nondet_int(); [L6] COND FALSE !(!cond) [L47] COND TRUE ((x % 2) == 0) && x > 1 [L48] x /= 2 [L47] COND FALSE !(((x % 2) == 0) && x > 1) [L49] return (x == 1); [L6] COND FALSE !(!cond) [L65] int *a = calloc(n, sizeof(int)); [L67] int *a0 = calloc(n, sizeof(int)); [L68] int i; [L69] i=0 [L69] COND TRUE i 0 [L34] int right = space*2 - 1; [L35] COND TRUE right < n [L36] int left = right - space; [L37] EXPR a[right] [L37] int temp = a[right]; [L38] EXPR a[left] [L38] EXPR a[right] [L38] a[right] = a[left] + a[right] [L39] a[left] = temp [L40] right = right + space*2 [L35] COND FALSE !(right < n) [L33] space=space/2 [L33] COND FALSE !(space > 0) [L53] int i, sum = 0; [L54] i=0 [L54] COND TRUE i