./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/ludcmp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/ludcmp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8 --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 f0546d8df91f3f30520fbe3b4dbdbfd43e8efce3 .......................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/ludcmp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8 --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 f0546d8df91f3f30520fbe3b4dbdbfd43e8efce3 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:14:20,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:14:20,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:14:20,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:14:20,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:14:20,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:14:20,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:14:20,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:14:20,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:14:20,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:14:20,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:14:20,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:14:20,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:14:20,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:14:20,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:14:20,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:14:20,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:14:20,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:14:20,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:14:20,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:14:20,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:14:20,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:14:20,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:14:20,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:14:20,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:14:20,850 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:14:20,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:14:20,853 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:14:20,853 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:14:20,855 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:14:20,855 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:14:20,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:14:20,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:14:20,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:14:20,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:14:20,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:14:20,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:14:20,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:14:20,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:14:20,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:14:20,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:14:20,864 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:14:20,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:14:20,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:14:20,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:14:20,907 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:14:20,907 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:14:20,908 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:14:20,908 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:14:20,908 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:14:20,908 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:14:20,908 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:14:20,915 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:14:20,915 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:14:20,916 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:14:20,916 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:14:20,916 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:14:20,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:14:20,917 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:14:20,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:14:20,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:14:20,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:14:20,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:14:20,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:14:20,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:14:20,919 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:14:20,919 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:14:20,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:14:20,919 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:14:20,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:14:20,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:14:20,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:14:20,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:14:20,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:14:20,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:14:20,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:14:20,922 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:14:20,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:14:20,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:14:20,923 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:14:20,923 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:14:20,924 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0546d8df91f3f30520fbe3b4dbdbfd43e8efce3 [2021-10-13 07:14:21,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:14:21,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:14:21,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:14:21,250 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:14:21,250 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:14:21,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loops/ludcmp.c [2021-10-13 07:14:21,310 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/data/ea764e91d/fca712e9587e47cdbc13d74e173b22ec/FLAGb0232cf3a [2021-10-13 07:14:21,749 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:14:21,750 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/sv-benchmarks/c/loops/ludcmp.c [2021-10-13 07:14:21,757 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/data/ea764e91d/fca712e9587e47cdbc13d74e173b22ec/FLAGb0232cf3a [2021-10-13 07:14:22,147 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/data/ea764e91d/fca712e9587e47cdbc13d74e173b22ec [2021-10-13 07:14:22,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:14:22,152 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:14:22,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:14:22,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:14:22,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:14:22,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:14:22" (1/1) ... [2021-10-13 07:14:22,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70cc7b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:22, skipping insertion in model container [2021-10-13 07:14:22,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:14:22" (1/1) ... [2021-10-13 07:14:22,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:14:22,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:14:22,402 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/sv-benchmarks/c/loops/ludcmp.c[318,331] [2021-10-13 07:14:22,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:14:22,479 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:14:22,493 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/sv-benchmarks/c/loops/ludcmp.c[318,331] [2021-10-13 07:14:22,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:14:22,527 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:14:22,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:22 WrapperNode [2021-10-13 07:14:22,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:14:22,529 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:14:22,529 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:14:22,529 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:14:22,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:22" (1/1) ... [2021-10-13 07:14:22,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:22" (1/1) ... [2021-10-13 07:14:22,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:14:22,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:14:22,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:14:22,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:14:22,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:22" (1/1) ... [2021-10-13 07:14:22,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:22" (1/1) ... [2021-10-13 07:14:22,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:22" (1/1) ... [2021-10-13 07:14:22,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:22" (1/1) ... [2021-10-13 07:14:22,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:22" (1/1) ... [2021-10-13 07:14:22,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:22" (1/1) ... [2021-10-13 07:14:22,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:22" (1/1) ... [2021-10-13 07:14:22,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:14:22,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:14:22,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:14:22,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:14:22,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:22" (1/1) ... [2021-10-13 07:14:22,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:14:22,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:14:22,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:14:22,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:14:22,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:14:22,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:14:22,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-10-13 07:14:22,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-13 07:14:22,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:14:22,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:14:22,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:14:23,381 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:14:23,382 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-13 07:14:23,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:14:23 BoogieIcfgContainer [2021-10-13 07:14:23,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:14:23,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:14:23,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:14:23,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:14:23,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:14:22" (1/3) ... [2021-10-13 07:14:23,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662ffe21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:14:23, skipping insertion in model container [2021-10-13 07:14:23,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:22" (2/3) ... [2021-10-13 07:14:23,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662ffe21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:14:23, skipping insertion in model container [2021-10-13 07:14:23,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:14:23" (3/3) ... [2021-10-13 07:14:23,393 INFO L111 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2021-10-13 07:14:23,397 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:14:23,397 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:14:23,431 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:14:23,436 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:14:23,437 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:14:23,449 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:23,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:14:23,455 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:23,456 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:14:23,456 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:23,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:23,461 INFO L82 PathProgramCache]: Analyzing trace with hash 219396429, now seen corresponding path program 1 times [2021-10-13 07:14:23,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:14:23,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716596603] [2021-10-13 07:14:23,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:23,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:14:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:23,743 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:14:23,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716596603] [2021-10-13 07:14:23,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716596603] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:14:23,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:14:23,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:14:23,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25147380] [2021-10-13 07:14:23,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:14:23,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:14:23,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:14:23,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:14:23,765 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:23,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:23,801 INFO L93 Difference]: Finished difference Result 44 states and 73 transitions. [2021-10-13 07:14:23,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:14:23,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 07:14:23,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:23,810 INFO L225 Difference]: With dead ends: 44 [2021-10-13 07:14:23,810 INFO L226 Difference]: Without dead ends: 8 [2021-10-13 07:14:23,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:14:23,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-13 07:14:23,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-13 07:14:23,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-10-13 07:14:23,840 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2021-10-13 07:14:23,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:23,840 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-13 07:14:23,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-10-13 07:14:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:14:23,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:23,842 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:14:23,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:14:23,842 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:23,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1788574205, now seen corresponding path program 1 times [2021-10-13 07:14:23,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:14:23,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614074955] [2021-10-13 07:14:23,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:23,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:14:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:23,957 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:14:23,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614074955] [2021-10-13 07:14:23,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614074955] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:14:23,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390052054] [2021-10-13 07:14:23,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:23,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:14:23,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:14:23,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:14:23,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:14:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:24,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:14:24,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:24,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:24,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390052054] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:14:24,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2093517847] [2021-10-13 07:14:24,230 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-13 07:14:24,231 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:14:24,237 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:14:24,243 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:14:24,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:14:24,280 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:24,290 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:14:24,292 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:24,293 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-10-13 07:14:24,294 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:14:24,295 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:24,295 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-10-13 07:14:24,296 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:14:24,297 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:24,298 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-13 07:14:24,307 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 255 [2021-10-13 07:14:24,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:24,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:24,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:24,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:24,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:24,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:24,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:24,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:24,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:24,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:24,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:24,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:24,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:24,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:24,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:24,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 31 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2021-10-13 07:14:24,416 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:24,428 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-10-13 07:14:24,430 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:24,432 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-10-13 07:14:24,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:14:24,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:14:24,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:24,521 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:24,533 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 260 [2021-10-13 07:14:24,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:14:24,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:251, output treesize:260 [2021-10-13 07:14:24,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:24,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:14:24,756 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_29| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:14:24,760 INFO L168 Benchmark]: Toolchain (without parser) took 2606.46 ms. Allocated memory was 109.1 MB in the beginning and 153.1 MB in the end (delta: 44.0 MB). Free memory was 69.3 MB in the beginning and 89.9 MB in the end (delta: -20.7 MB). Peak memory consumption was 23.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:14:24,760 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 109.1 MB. Free memory was 85.7 MB in the beginning and 85.6 MB in the end (delta: 62.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:14:24,761 INFO L168 Benchmark]: CACSL2BoogieTranslator took 371.14 ms. Allocated memory is still 109.1 MB. Free memory was 69.1 MB in the beginning and 82.1 MB in the end (delta: -13.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:14:24,761 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.69 ms. Allocated memory is still 109.1 MB. Free memory was 82.1 MB in the beginning and 79.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:14:24,762 INFO L168 Benchmark]: Boogie Preprocessor took 31.53 ms. Allocated memory is still 109.1 MB. Free memory was 79.7 MB in the beginning and 77.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:14:24,763 INFO L168 Benchmark]: RCFGBuilder took 752.82 ms. Allocated memory is still 109.1 MB. Free memory was 77.9 MB in the beginning and 53.1 MB in the end (delta: 24.8 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:14:24,763 INFO L168 Benchmark]: TraceAbstraction took 1372.28 ms. Allocated memory was 109.1 MB in the beginning and 153.1 MB in the end (delta: 44.0 MB). Free memory was 52.8 MB in the beginning and 89.9 MB in the end (delta: -37.1 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:14:24,767 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 109.1 MB. Free memory was 85.7 MB in the beginning and 85.6 MB in the end (delta: 62.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 371.14 ms. Allocated memory is still 109.1 MB. Free memory was 69.1 MB in the beginning and 82.1 MB in the end (delta: -13.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 69.69 ms. Allocated memory is still 109.1 MB. Free memory was 82.1 MB in the beginning and 79.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.53 ms. Allocated memory is still 109.1 MB. Free memory was 79.7 MB in the beginning and 77.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 752.82 ms. Allocated memory is still 109.1 MB. Free memory was 77.9 MB in the beginning and 53.1 MB in the end (delta: 24.8 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1372.28 ms. Allocated memory was 109.1 MB in the beginning and 153.1 MB in the end (delta: 44.0 MB). Free memory was 52.8 MB in the beginning and 89.9 MB in the end (delta: -37.1 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_29| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_29|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:14:24,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:14:27,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:14:27,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:14:27,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:14:27,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:14:27,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:14:27,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:14:27,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:14:27,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:14:27,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:14:27,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:14:27,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:14:27,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:14:27,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:14:27,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:14:27,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:14:27,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:14:27,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:14:27,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:14:27,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:14:27,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:14:27,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:14:27,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:14:27,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:14:27,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:14:27,601 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:14:27,602 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:14:27,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:14:27,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:14:27,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:14:27,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:14:27,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:14:27,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:14:27,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:14:27,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:14:27,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:14:27,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:14:27,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:14:27,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:14:27,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:14:27,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:14:27,619 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:14:27,676 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:14:27,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:14:27,678 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:14:27,679 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:14:27,679 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:14:27,679 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:14:27,680 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:14:27,680 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:14:27,680 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:14:27,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:14:27,683 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:14:27,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:14:27,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:14:27,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:14:27,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:14:27,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:14:27,685 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:14:27,685 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:14:27,685 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:14:27,686 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:14:27,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:14:27,686 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:14:27,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:14:27,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:14:27,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:14:27,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:14:27,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:14:27,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:14:27,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:14:27,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:14:27,689 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:14:27,689 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:14:27,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:14:27,690 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:14:27,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:14:27,691 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0546d8df91f3f30520fbe3b4dbdbfd43e8efce3 [2021-10-13 07:14:28,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:14:28,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:14:28,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:14:28,129 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:14:28,130 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:14:28,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loops/ludcmp.c [2021-10-13 07:14:28,215 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/data/0561c0422/fe42ae6a72fe4d01973dc86e4905f421/FLAG523a854a9 [2021-10-13 07:14:28,697 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:14:28,698 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/sv-benchmarks/c/loops/ludcmp.c [2021-10-13 07:14:28,711 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/data/0561c0422/fe42ae6a72fe4d01973dc86e4905f421/FLAG523a854a9 [2021-10-13 07:14:29,062 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/data/0561c0422/fe42ae6a72fe4d01973dc86e4905f421 [2021-10-13 07:14:29,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:14:29,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:14:29,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:14:29,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:14:29,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:14:29,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:14:29" (1/1) ... [2021-10-13 07:14:29,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3db5654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:29, skipping insertion in model container [2021-10-13 07:14:29,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:14:29" (1/1) ... [2021-10-13 07:14:29,092 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:14:29,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:14:29,241 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/sv-benchmarks/c/loops/ludcmp.c[318,331] [2021-10-13 07:14:29,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:14:29,294 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:14:29,306 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/sv-benchmarks/c/loops/ludcmp.c[318,331] [2021-10-13 07:14:29,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:14:29,388 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:14:29,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:29 WrapperNode [2021-10-13 07:14:29,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:14:29,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:14:29,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:14:29,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:14:29,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:29" (1/1) ... [2021-10-13 07:14:29,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:29" (1/1) ... [2021-10-13 07:14:29,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:14:29,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:14:29,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:14:29,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:14:29,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:29" (1/1) ... [2021-10-13 07:14:29,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:29" (1/1) ... [2021-10-13 07:14:29,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:29" (1/1) ... [2021-10-13 07:14:29,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:29" (1/1) ... [2021-10-13 07:14:29,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:29" (1/1) ... [2021-10-13 07:14:29,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:29" (1/1) ... [2021-10-13 07:14:29,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:29" (1/1) ... [2021-10-13 07:14:29,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:14:29,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:14:29,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:14:29,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:14:29,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:29" (1/1) ... [2021-10-13 07:14:29,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:14:29,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:14:29,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:14:29,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:14:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-10-13 07:14:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-10-13 07:14:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:14:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:14:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:14:29,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:14:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:14:45,868 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:14:45,869 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-13 07:14:45,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:14:45 BoogieIcfgContainer [2021-10-13 07:14:45,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:14:45,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:14:45,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:14:45,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:14:45,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:14:29" (1/3) ... [2021-10-13 07:14:45,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3740cdc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:14:45, skipping insertion in model container [2021-10-13 07:14:45,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:29" (2/3) ... [2021-10-13 07:14:45,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3740cdc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:14:45, skipping insertion in model container [2021-10-13 07:14:45,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:14:45" (3/3) ... [2021-10-13 07:14:45,880 INFO L111 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2021-10-13 07:14:45,885 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:14:45,885 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:14:45,927 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:14:45,932 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:14:45,932 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:14:45,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:45,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:14:45,951 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:45,951 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:14:45,952 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:45,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:45,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1809811384, now seen corresponding path program 1 times [2021-10-13 07:14:45,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:14:45,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185904843] [2021-10-13 07:14:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:45,970 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:14:45,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:14:45,976 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:14:45,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:14:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:46,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:14:46,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:46,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:46,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:14:46,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185904843] [2021-10-13 07:14:46,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185904843] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:14:46,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:14:46,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:14:46,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014962482] [2021-10-13 07:14:46,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:14:46,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:14:46,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:14:46,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:14:46,515 INFO L87 Difference]: Start difference. First operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:47,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:47,621 INFO L93 Difference]: Finished difference Result 103 states and 162 transitions. [2021-10-13 07:14:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:14:47,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 07:14:47,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:47,638 INFO L225 Difference]: With dead ends: 103 [2021-10-13 07:14:47,638 INFO L226 Difference]: Without dead ends: 18 [2021-10-13 07:14:47,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:14:47,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-13 07:14:47,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-13 07:14:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-10-13 07:14:47,670 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 7 [2021-10-13 07:14:47,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:47,670 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-10-13 07:14:47,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:47,671 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-10-13 07:14:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:14:47,672 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:47,672 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:14:47,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:47,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:14:47,892 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:47,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:47,892 INFO L82 PathProgramCache]: Analyzing trace with hash 116728450, now seen corresponding path program 1 times [2021-10-13 07:14:47,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:14:47,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521469964] [2021-10-13 07:14:47,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:47,894 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:14:47,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:14:47,904 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:14:47,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:14:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:48,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:14:48,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:48,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:49,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:14:49,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521469964] [2021-10-13 07:14:49,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521469964] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:14:49,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [635709322] [2021-10-13 07:14:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:49,064 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:14:49,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:14:49,070 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:14:49,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-10-13 07:14:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:49,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:14:49,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:49,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:49,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [635709322] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:14:49,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657629495] [2021-10-13 07:14:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:49,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:14:49,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:14:49,686 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:14:49,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 07:14:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:49,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:14:49,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:50,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:50,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657629495] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:14:50,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:14:50,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-10-13 07:14:50,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070101157] [2021-10-13 07:14:50,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:14:50,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:14:50,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:14:50,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:14:50,285 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:53,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:53,342 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2021-10-13 07:14:53,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:14:53,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 07:14:53,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:53,347 INFO L225 Difference]: With dead ends: 94 [2021-10-13 07:14:53,347 INFO L226 Difference]: Without dead ends: 78 [2021-10-13 07:14:53,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 356.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:14:53,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-13 07:14:53,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-10-13 07:14:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:53,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-10-13 07:14:53,363 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 15 [2021-10-13 07:14:53,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:53,364 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-10-13 07:14:53,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:53,364 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-10-13 07:14:53,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:14:53,365 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:53,365 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:14:53,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:53,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:53,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:53,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:14:53,991 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:53,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:53,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1891735812, now seen corresponding path program 1 times [2021-10-13 07:14:53,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:14:53,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752030940] [2021-10-13 07:14:53,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:53,993 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:14:53,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:14:53,994 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:14:53,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:14:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:54,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:14:54,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:54,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:55,202 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:14:55,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752030940] [2021-10-13 07:14:55,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752030940] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:14:55,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2109606401] [2021-10-13 07:14:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:55,204 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:14:55,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:14:55,211 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:14:55,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 07:14:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:55,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:14:55,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:56,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:56,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2109606401] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:14:56,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879906119] [2021-10-13 07:14:56,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:56,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:14:56,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:14:56,194 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:14:56,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 07:14:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:56,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:14:56,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:56,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:56,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879906119] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:14:56,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:14:56,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-10-13 07:14:56,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003588547] [2021-10-13 07:14:56,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:14:56,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:14:56,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:14:56,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:14:56,928 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:59,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:59,569 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2021-10-13 07:14:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:14:59,579 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 07:14:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:59,581 INFO L225 Difference]: With dead ends: 121 [2021-10-13 07:14:59,581 INFO L226 Difference]: Without dead ends: 98 [2021-10-13 07:14:59,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 594.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:14:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-13 07:14:59,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-10-13 07:14:59,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 97 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:59,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2021-10-13 07:14:59,602 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 15 [2021-10-13 07:14:59,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:59,602 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2021-10-13 07:14:59,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:59,602 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2021-10-13 07:14:59,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 07:14:59,603 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:59,603 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:14:59,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:59,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:15:00,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:15:00,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:15:00,204 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:15:00,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:00,205 INFO L82 PathProgramCache]: Analyzing trace with hash -642360546, now seen corresponding path program 2 times [2021-10-13 07:15:00,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:15:00,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864100548] [2021-10-13 07:15:00,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:15:00,206 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:15:00,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:15:00,207 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:15:00,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:15:00,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:15:00,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:15:00,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:15:00,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:15:01,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:15:02,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:15:02,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864100548] [2021-10-13 07:15:02,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864100548] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:15:02,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1194733589] [2021-10-13 07:15:02,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:15:02,430 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:15:02,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:15:02,439 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:15:02,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-13 07:15:02,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:15:02,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:15:02,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:15:02,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:15:03,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:15:03,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1194733589] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:15:03,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549963037] [2021-10-13 07:15:03,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:15:03,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:15:03,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:15:03,851 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:15:03,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 07:15:04,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:15:04,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:15:04,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:15:04,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:15:05,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:15:05,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549963037] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:15:05,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:15:05,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2021-10-13 07:15:05,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901543604] [2021-10-13 07:15:05,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 07:15:05,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:15:05,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 07:15:05,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:15:05,494 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:15,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:15:15,353 INFO L93 Difference]: Finished difference Result 448 states and 518 transitions. [2021-10-13 07:15:15,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-13 07:15:15,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-13 07:15:15,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:15:15,357 INFO L225 Difference]: With dead ends: 448 [2021-10-13 07:15:15,357 INFO L226 Difference]: Without dead ends: 374 [2021-10-13 07:15:15,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 2728.8ms TimeCoverageRelationStatistics Valid=460, Invalid=1100, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 07:15:15,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-10-13 07:15:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 183. [2021-10-13 07:15:15,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.1538461538461537) internal successors, (210), 182 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:15,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 210 transitions. [2021-10-13 07:15:15,388 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 210 transitions. Word has length 31 [2021-10-13 07:15:15,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:15:15,389 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 210 transitions. [2021-10-13 07:15:15,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:15:15,389 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 210 transitions. [2021-10-13 07:15:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 07:15:15,391 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:15:15,391 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:15:15,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-10-13 07:15:15,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:15:15,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:15:15,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:15:15,994 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:15:15,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:15:15,995 INFO L82 PathProgramCache]: Analyzing trace with hash 58704032, now seen corresponding path program 3 times [2021-10-13 07:15:15,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:15:15,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135810417] [2021-10-13 07:15:15,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:15:15,996 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:15:15,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:15:15,997 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:15:15,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 07:15:17,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-13 07:15:17,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-13 07:15:17,475 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:15:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:15:18,567 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:15:18,582 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:15:18,584 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:15:18,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:15:18,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:15:18,792 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:15:18,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:15:18 BoogieIcfgContainer [2021-10-13 07:15:18,879 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:15:18,879 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:15:18,880 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:15:18,880 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:15:18,880 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:14:45" (3/4) ... [2021-10-13 07:15:18,884 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:15:18,947 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:15:18,947 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:15:18,949 INFO L168 Benchmark]: Toolchain (without parser) took 49874.87 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 47.6 MB in the beginning and 24.9 MB in the end (delta: 22.7 MB). Peak memory consumption was 39.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:15:18,949 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 65.0 MB. Free memory is still 46.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:15:18,950 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.14 ms. Allocated memory is still 65.0 MB. Free memory was 47.4 MB in the beginning and 48.3 MB in the end (delta: -890.3 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:15:18,950 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.27 ms. Allocated memory is still 65.0 MB. Free memory was 48.3 MB in the beginning and 45.8 MB in the end (delta: 2.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:15:18,951 INFO L168 Benchmark]: Boogie Preprocessor took 45.16 ms. Allocated memory is still 65.0 MB. Free memory was 45.8 MB in the beginning and 43.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:15:18,952 INFO L168 Benchmark]: RCFGBuilder took 16383.71 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 43.7 MB in the beginning and 61.1 MB in the end (delta: -17.4 MB). Peak memory consumption was 22.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:15:18,952 INFO L168 Benchmark]: TraceAbstraction took 33005.71 ms. Allocated memory is still 81.8 MB. Free memory was 60.4 MB in the beginning and 28.5 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:15:18,953 INFO L168 Benchmark]: Witness Printer took 67.97 ms. Allocated memory is still 81.8 MB. Free memory was 28.5 MB in the beginning and 24.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:15:18,956 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 65.0 MB. Free memory is still 46.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 311.14 ms. Allocated memory is still 65.0 MB. Free memory was 47.4 MB in the beginning and 48.3 MB in the end (delta: -890.3 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.27 ms. Allocated memory is still 65.0 MB. Free memory was 48.3 MB in the beginning and 45.8 MB in the end (delta: 2.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.16 ms. Allocated memory is still 65.0 MB. Free memory was 45.8 MB in the beginning and 43.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 16383.71 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 43.7 MB in the beginning and 61.1 MB in the end (delta: -17.4 MB). Peak memory consumption was 22.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 33005.71 ms. Allocated memory is still 81.8 MB. Free memory was 60.4 MB in the beginning and 28.5 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.3 MB. Max. memory is 16.1 GB. * Witness Printer took 67.97 ms. Allocated memory is still 81.8 MB. Free memory was 28.5 MB in the beginning and 24.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L71] double a[50][50], b[50], x[50]; VAL [a={10:0}, b={14:0}, x={11:0}] [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 VAL [a={10:0}, b={14:0}, x={11:0}] [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={10:0}, b={14:0}, x={11:0}] [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={10:0}, b={14:0}, x={11:0}] [L99] COND FALSE !(i == j) VAL [a={10:0}, b={14:0}, x={11:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={10:0}, b={14:0}, x={11:0}] [L99] COND FALSE !(i == j) VAL [a={10:0}, b={14:0}, x={11:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={10:0}, b={14:0}, x={11:0}] [L99] COND FALSE !(i == j) VAL [a={10:0}, b={14:0}, x={11:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={10:0}, b={14:0}, x={11:0}] [L99] COND FALSE !(i == j) VAL [a={10:0}, b={14:0}, x={11:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={10:0}, b={14:0}, x={11:0}] [L99] COND FALSE !(i == j) VAL [a={10:0}, b={14:0}, x={11:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND FALSE !(j <= n) VAL [a={10:0}, b={14:0}, x={11:0}] [L6] COND TRUE !(cond) VAL [a={10:0}, b={14:0}, x={11:0}] [L7] reach_error() VAL [a={10:0}, b={14:0}, x={11:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 32864.7ms, OverallIterations: 5, TraceHistogramMax: 6, EmptinessCheckTime: 12.3ms, AutomataDifference: 16726.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 89 SDtfs, 571 SDslu, 251 SDs, 0 SdLazy, 524 SolverSat, 125 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13110.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 392 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3893.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=4, InterpolantAutomatonStates: 60, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 79.1ms AutomataMinimizationTime, 4 MinimizatonAttempts, 222 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 102.1ms SsaConstructionTime, 4350.0ms SatisfiabilityAnalysisTime, 7090.2ms InterpolantComputationTime, 221 NumberOfCodeBlocks, 221 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 360 ConstructedInterpolants, 0 QuantifiedInterpolants, 1446 SizeOfPredicates, 20 NumberOfNonLiveVariables, 680 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 228/468 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 07:15:19,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4aae54-80c5-41c2-b179-3952a5e1a3ac/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...