./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s2iff.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_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/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_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s2iff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/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_1e206d25-076b-40dd-b4b4-0574110adee0/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 a22ecd7dbca86ce676366b458aa720e60c3fd1ca ............................................................................................................................................................................................................................................................................................................................................................................................................. 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_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/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_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s2iff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/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_1e206d25-076b-40dd-b4b4-0574110adee0/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 a22ecd7dbca86ce676366b458aa720e60c3fd1ca ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:42:06,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:42:06,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:42:06,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:42:06,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:42:06,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:42:06,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:42:06,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:42:06,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:42:06,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:42:06,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:42:06,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:42:06,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:42:06,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:42:06,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:42:06,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:42:06,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:42:06,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:42:06,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:42:06,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:42:06,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:42:06,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:42:06,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:42:06,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:42:06,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:42:06,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:42:06,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:42:06,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:42:06,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:42:06,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:42:06,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:42:06,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:42:06,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:42:06,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:42:06,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:42:06,996 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:42:06,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:42:06,997 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:42:06,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:42:06,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:42:06,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:42:07,000 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:42:07,041 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:42:07,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:42:07,043 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:42:07,043 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:42:07,043 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:42:07,044 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:42:07,044 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:42:07,044 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:42:07,044 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:42:07,045 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:42:07,046 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:42:07,046 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:42:07,046 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:42:07,047 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:42:07,047 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:42:07,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:42:07,048 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:42:07,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:42:07,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:42:07,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:42:07,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:42:07,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:42:07,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:42:07,050 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:42:07,050 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:42:07,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:42:07,050 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:42:07,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:42:07,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:42:07,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:42:07,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:42:07,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:42:07,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:42:07,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:42:07,054 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:42:07,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:42:07,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:42:07,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:42:07,055 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:42:07,055 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_1e206d25-076b-40dd-b4b4-0574110adee0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a22ecd7dbca86ce676366b458aa720e60c3fd1ca [2021-10-13 07:42:07,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:42:07,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:42:07,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:42:07,349 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:42:07,350 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:42:07,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-fpi/s2iff.c [2021-10-13 07:42:07,407 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/data/549e3457f/7a7f5e2d33484a6aad19417a7badf69f/FLAG52eafa540 [2021-10-13 07:42:07,826 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:42:07,827 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/sv-benchmarks/c/array-fpi/s2iff.c [2021-10-13 07:42:07,833 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/data/549e3457f/7a7f5e2d33484a6aad19417a7badf69f/FLAG52eafa540 [2021-10-13 07:42:07,845 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/data/549e3457f/7a7f5e2d33484a6aad19417a7badf69f [2021-10-13 07:42:07,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:42:07,848 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:42:07,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:42:07,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:42:07,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:42:07,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:42:07" (1/1) ... [2021-10-13 07:42:07,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@137a2252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:07, skipping insertion in model container [2021-10-13 07:42:07,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:42:07" (1/1) ... [2021-10-13 07:42:07,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:42:07,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:42:08,089 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_1e206d25-076b-40dd-b4b4-0574110adee0/sv-benchmarks/c/array-fpi/s2iff.c[588,601] [2021-10-13 07:42:08,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:42:08,112 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:42:08,126 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_1e206d25-076b-40dd-b4b4-0574110adee0/sv-benchmarks/c/array-fpi/s2iff.c[588,601] [2021-10-13 07:42:08,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:42:08,160 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:42:08,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:08 WrapperNode [2021-10-13 07:42:08,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:42:08,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:42:08,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:42:08,161 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:42:08,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:08" (1/1) ... [2021-10-13 07:42:08,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:08" (1/1) ... [2021-10-13 07:42:08,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:42:08,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:42:08,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:42:08,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:42:08,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:08" (1/1) ... [2021-10-13 07:42:08,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:08" (1/1) ... [2021-10-13 07:42:08,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:08" (1/1) ... [2021-10-13 07:42:08,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:08" (1/1) ... [2021-10-13 07:42:08,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:08" (1/1) ... [2021-10-13 07:42:08,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:08" (1/1) ... [2021-10-13 07:42:08,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:08" (1/1) ... [2021-10-13 07:42:08,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:42:08,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:42:08,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:42:08,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:42:08,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:08" (1/1) ... [2021-10-13 07:42:08,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:42:08,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:42:08,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:42:08,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:42:08,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:42:08,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:42:08,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:42:08,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:42:08,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:42:08,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:42:08,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:42:08,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:42:08,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:42:08,714 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-13 07:42:08,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:42:08 BoogieIcfgContainer [2021-10-13 07:42:08,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:42:08,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:42:08,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:42:08,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:42:08,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:42:07" (1/3) ... [2021-10-13 07:42:08,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1cbeda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:42:08, skipping insertion in model container [2021-10-13 07:42:08,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:08" (2/3) ... [2021-10-13 07:42:08,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1cbeda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:42:08, skipping insertion in model container [2021-10-13 07:42:08,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:42:08" (3/3) ... [2021-10-13 07:42:08,728 INFO L111 eAbstractionObserver]: Analyzing ICFG s2iff.c [2021-10-13 07:42:08,732 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:42:08,733 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:42:08,777 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:42:08,783 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 07:42:08,783 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:42:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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 07:42:08,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:42:08,796 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:42:08,797 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:42:08,797 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:42:08,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:42:08,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1569409207, now seen corresponding path program 1 times [2021-10-13 07:42:08,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:42:08,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589011735] [2021-10-13 07:42:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:08,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:42:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:42:09,031 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 07:42:09,031 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:42:09,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589011735] [2021-10-13 07:42:09,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589011735] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:42:09,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:42:09,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:42:09,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338956345] [2021-10-13 07:42:09,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:42:09,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:42:09,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:42:09,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:42:09,054 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:42:09,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:42:09,082 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-10-13 07:42:09,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:42:09,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:42:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:42:09,091 INFO L225 Difference]: With dead ends: 18 [2021-10-13 07:42:09,092 INFO L226 Difference]: Without dead ends: 8 [2021-10-13 07:42:09,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:42:09,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-13 07:42:09,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-13 07:42:09,121 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 07:42:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-10-13 07:42:09,123 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-10-13 07:42:09,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:42:09,124 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-13 07:42:09,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:42:09,124 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-10-13 07:42:09,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:42:09,125 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:42:09,125 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:42:09,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:42:09,126 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:42:09,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:42:09,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1413550180, now seen corresponding path program 1 times [2021-10-13 07:42:09,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:42:09,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233808844] [2021-10-13 07:42:09,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:09,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:42:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:42:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:42:09,207 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:42:09,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233808844] [2021-10-13 07:42:09,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233808844] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:42:09,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:42:09,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:42:09,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333804012] [2021-10-13 07:42:09,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:42:09,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:42:09,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:42:09,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:42:09,216 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:42:09,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:42:09,261 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-10-13 07:42:09,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:42:09,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 07:42:09,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:42:09,262 INFO L225 Difference]: With dead ends: 12 [2021-10-13 07:42:09,262 INFO L226 Difference]: Without dead ends: 9 [2021-10-13 07:42:09,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:42:09,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-13 07:42:09,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-13 07:42:09,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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 07:42:09,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-13 07:42:09,266 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-10-13 07:42:09,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:42:09,266 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-13 07:42:09,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:42:09,267 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-13 07:42:09,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:42:09,267 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:42:09,267 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:42:09,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:42:09,268 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:42:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:42:09,269 INFO L82 PathProgramCache]: Analyzing trace with hash -870274037, now seen corresponding path program 1 times [2021-10-13 07:42:09,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:42:09,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750298526] [2021-10-13 07:42:09,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:09,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:42:09,303 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:42:09,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230289887] [2021-10-13 07:42:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:09,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:42:09,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:42:09,310 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:42:09,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:42:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:42:09,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 07:42:09,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:09,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:42:09,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-13 07:42:09,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 07:42:09,859 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-10-13 07:42:09,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 27 [2021-10-13 07:42:10,005 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:42:10,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 40 [2021-10-13 07:42:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:10,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:10,644 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:42:10,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750298526] [2021-10-13 07:42:10,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:42:10,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230289887] [2021-10-13 07:42:10,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230289887] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:10,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1821927175] [2021-10-13 07:42:10,671 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-13 07:42:10,671 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:42:10,675 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:42:10,679 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:42:10,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:42:10,702 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:42:10,703 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:42:10,704 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:42:10,704 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:42:10,705 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:42:10,706 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:42:10,706 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:42:10,708 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-10-13 07:42:10,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:42:10,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:42:10,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:42:10,764 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-13 07:42:10,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-13 07:42:10,766 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:42:10,769 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 07:42:10,770 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:42:10,770 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 07:42:10,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:42:10,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:42:10,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:42:10,803 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:42:10,804 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-10-13 07:42:10,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:42:10,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:124, output treesize:108 [2021-10-13 07:42:10,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-13 07:42:11,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:42:11,030 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_17| 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 07:42:11,033 INFO L168 Benchmark]: Toolchain (without parser) took 3184.68 ms. Allocated memory was 86.0 MB in the beginning and 107.0 MB in the end (delta: 21.0 MB). Free memory was 49.4 MB in the beginning and 51.4 MB in the end (delta: -2.0 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:42:11,034 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 86.0 MB. Free memory was 65.9 MB in the beginning and 65.8 MB in the end (delta: 70.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:42:11,034 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.93 ms. Allocated memory was 86.0 MB in the beginning and 107.0 MB in the end (delta: 21.0 MB). Free memory was 49.2 MB in the beginning and 82.3 MB in the end (delta: -33.2 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:42:11,035 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.79 ms. Allocated memory is still 107.0 MB. Free memory was 82.3 MB in the beginning and 80.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:42:11,035 INFO L168 Benchmark]: Boogie Preprocessor took 41.00 ms. Allocated memory is still 107.0 MB. Free memory was 80.7 MB in the beginning and 79.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:42:11,035 INFO L168 Benchmark]: RCFGBuilder took 478.13 ms. Allocated memory is still 107.0 MB. Free memory was 79.6 MB in the beginning and 65.3 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:42:11,036 INFO L168 Benchmark]: TraceAbstraction took 2314.29 ms. Allocated memory is still 107.0 MB. Free memory was 64.7 MB in the beginning and 51.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:42:11,038 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 86.0 MB. Free memory was 65.9 MB in the beginning and 65.8 MB in the end (delta: 70.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 310.93 ms. Allocated memory was 86.0 MB in the beginning and 107.0 MB in the end (delta: 21.0 MB). Free memory was 49.2 MB in the beginning and 82.3 MB in the end (delta: -33.2 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.79 ms. Allocated memory is still 107.0 MB. Free memory was 82.3 MB in the beginning and 80.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.00 ms. Allocated memory is still 107.0 MB. Free memory was 80.7 MB in the beginning and 79.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 478.13 ms. Allocated memory is still 107.0 MB. Free memory was 79.6 MB in the beginning and 65.3 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2314.29 ms. Allocated memory is still 107.0 MB. Free memory was 64.7 MB in the beginning and 51.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_17| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_17|: 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 07:42:11,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:42:13,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:42:13,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:42:13,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:42:13,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:42:13,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:42:13,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:42:13,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:42:13,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:42:13,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:42:13,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:42:13,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:42:13,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:42:13,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:42:13,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:42:13,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:42:13,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:42:13,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:42:13,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:42:13,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:42:13,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:42:13,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:42:13,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:42:13,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:42:13,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:42:13,507 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:42:13,508 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:42:13,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:42:13,509 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:42:13,510 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:42:13,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:42:13,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:42:13,512 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:42:13,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:42:13,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:42:13,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:42:13,516 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:42:13,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:42:13,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:42:13,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:42:13,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:42:13,519 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:42:13,545 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:42:13,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:42:13,547 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:42:13,547 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:42:13,547 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:42:13,547 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:42:13,548 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:42:13,548 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:42:13,548 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:42:13,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:42:13,549 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:42:13,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:42:13,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:42:13,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:42:13,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:42:13,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:42:13,550 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:42:13,551 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:42:13,551 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:42:13,551 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:42:13,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:42:13,551 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:42:13,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:42:13,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:42:13,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:42:13,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:42:13,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:42:13,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:42:13,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:42:13,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:42:13,553 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:42:13,554 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:42:13,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:42:13,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:42:13,554 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:42:13,555 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_1e206d25-076b-40dd-b4b4-0574110adee0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a22ecd7dbca86ce676366b458aa720e60c3fd1ca [2021-10-13 07:42:13,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:42:13,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:42:13,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:42:13,920 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:42:13,921 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:42:13,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-fpi/s2iff.c [2021-10-13 07:42:14,010 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/data/cbc18d635/dc966d28c458401abab1f1d624898c55/FLAGe84bddb18 [2021-10-13 07:42:14,538 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:42:14,539 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/sv-benchmarks/c/array-fpi/s2iff.c [2021-10-13 07:42:14,546 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/data/cbc18d635/dc966d28c458401abab1f1d624898c55/FLAGe84bddb18 [2021-10-13 07:42:14,885 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/data/cbc18d635/dc966d28c458401abab1f1d624898c55 [2021-10-13 07:42:14,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:42:14,889 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:42:14,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:42:14,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:42:14,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:42:14,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:42:14" (1/1) ... [2021-10-13 07:42:14,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4156a10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:14, skipping insertion in model container [2021-10-13 07:42:14,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:42:14" (1/1) ... [2021-10-13 07:42:14,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:42:14,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:42:15,068 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_1e206d25-076b-40dd-b4b4-0574110adee0/sv-benchmarks/c/array-fpi/s2iff.c[588,601] [2021-10-13 07:42:15,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:42:15,096 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:42:15,130 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_1e206d25-076b-40dd-b4b4-0574110adee0/sv-benchmarks/c/array-fpi/s2iff.c[588,601] [2021-10-13 07:42:15,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:42:15,188 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:42:15,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:15 WrapperNode [2021-10-13 07:42:15,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:42:15,189 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:42:15,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:42:15,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:42:15,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:15" (1/1) ... [2021-10-13 07:42:15,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:15" (1/1) ... [2021-10-13 07:42:15,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:42:15,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:42:15,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:42:15,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:42:15,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:15" (1/1) ... [2021-10-13 07:42:15,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:15" (1/1) ... [2021-10-13 07:42:15,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:15" (1/1) ... [2021-10-13 07:42:15,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:15" (1/1) ... [2021-10-13 07:42:15,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:15" (1/1) ... [2021-10-13 07:42:15,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:15" (1/1) ... [2021-10-13 07:42:15,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:15" (1/1) ... [2021-10-13 07:42:15,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:42:15,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:42:15,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:42:15,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:42:15,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:15" (1/1) ... [2021-10-13 07:42:15,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:42:15,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:42:15,303 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:42:15,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:42:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:42:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:42:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-10-13 07:42:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:42:15,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:42:15,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:42:15,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:42:15,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-10-13 07:42:15,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:42:15,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:42:15,657 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:42:15,657 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-13 07:42:15,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:42:15 BoogieIcfgContainer [2021-10-13 07:42:15,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:42:15,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:42:15,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:42:15,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:42:15,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:42:14" (1/3) ... [2021-10-13 07:42:15,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f56112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:42:15, skipping insertion in model container [2021-10-13 07:42:15,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:15" (2/3) ... [2021-10-13 07:42:15,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f56112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:42:15, skipping insertion in model container [2021-10-13 07:42:15,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:42:15" (3/3) ... [2021-10-13 07:42:15,666 INFO L111 eAbstractionObserver]: Analyzing ICFG s2iff.c [2021-10-13 07:42:15,671 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:42:15,671 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:42:15,736 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:42:15,745 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 07:42:15,745 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:42:15,760 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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 07:42:15,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:42:15,776 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:42:15,777 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:42:15,778 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:42:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:42:15,786 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2021-10-13 07:42:15,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:42:15,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852322397] [2021-10-13 07:42:15,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:15,799 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:42:15,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:42:15,808 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:42:15,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:42:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:42:15,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:42:15,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:16,006 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 07:42:16,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:16,072 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 07:42:16,073 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:42:16,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852322397] [2021-10-13 07:42:16,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852322397] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:42:16,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:42:16,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:42:16,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340670601] [2021-10-13 07:42:16,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:42:16,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:42:16,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:42:16,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:42:16,121 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:42:16,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:42:16,134 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-10-13 07:42:16,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:42:16,135 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 07:42:16,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:42:16,142 INFO L225 Difference]: With dead ends: 34 [2021-10-13 07:42:16,142 INFO L226 Difference]: Without dead ends: 15 [2021-10-13 07:42:16,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:42:16,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-13 07:42:16,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-13 07:42:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:42:16,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-10-13 07:42:16,172 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-10-13 07:42:16,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:42:16,172 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-13 07:42:16,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:42:16,173 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-10-13 07:42:16,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:42:16,173 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:42:16,173 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:42:16,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:16,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:42:16,385 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:42:16,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:42:16,386 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2021-10-13 07:42:16,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:42:16,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862177772] [2021-10-13 07:42:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:16,387 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:42:16,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:42:16,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:42:16,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:42:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:42:16,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:42:16,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:16,641 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 07:42:16,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:16,741 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 07:42:16,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:42:16,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862177772] [2021-10-13 07:42:16,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862177772] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:42:16,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:42:16,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 07:42:16,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359539305] [2021-10-13 07:42:16,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:42:16,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:42:16,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:42:16,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:42:16,746 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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 07:42:17,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:42:17,066 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-10-13 07:42:17,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:42:17,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 07:42:17,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:42:17,068 INFO L225 Difference]: With dead ends: 28 [2021-10-13 07:42:17,068 INFO L226 Difference]: Without dead ends: 20 [2021-10-13 07:42:17,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:42:17,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-13 07:42:17,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-10-13 07:42:17,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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 07:42:17,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-13 07:42:17,074 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-10-13 07:42:17,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:42:17,074 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-13 07:42:17,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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 07:42:17,074 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-13 07:42:17,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:42:17,075 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:42:17,075 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:42:17,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:17,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:42:17,287 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:42:17,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:42:17,287 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2021-10-13 07:42:17,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:42:17,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216784324] [2021-10-13 07:42:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:17,289 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:42:17,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:42:17,296 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:42:17,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:42:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:42:17,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:42:17,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:17,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:42:17,610 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-13 07:42:17,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2021-10-13 07:42:17,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-10-13 07:42:17,737 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 07:42:17,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-10-13 07:42:18,379 INFO L354 Elim1Store]: treesize reduction 134, result has 13.5 percent of original size [2021-10-13 07:42:18,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 53 [2021-10-13 07:42:18,670 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-13 07:42:18,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 68 [2021-10-13 07:42:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:18,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:25,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:42:25,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:42:25,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:42:25,840 INFO L354 Elim1Store]: treesize reduction 87, result has 26.3 percent of original size [2021-10-13 07:42:25,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 837 treesize of output 531 [2021-10-13 07:42:25,868 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:42:25,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 531 treesize of output 509 [2021-10-13 07:42:25,892 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 07:42:25,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 669 treesize of output 663 [2021-10-13 07:42:25,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 651 treesize of output 649 [2021-10-13 07:42:25,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 643 treesize of output 641 [2021-10-13 07:42:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:26,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:42:26,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216784324] [2021-10-13 07:42:26,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216784324] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:26,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [441482240] [2021-10-13 07:42:26,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:26,619 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:42:26,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:42:26,621 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:42:26,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 07:42:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:42:26,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:42:26,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:27,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:42:27,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:42:27,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2021-10-13 07:42:27,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:42:27,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:42:27,289 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-13 07:42:27,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2021-10-13 07:42:28,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:42:28,314 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-10-13 07:42:28,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 55 [2021-10-13 07:42:28,746 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:42:28,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 90 [2021-10-13 07:42:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:28,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:31,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:42:31,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:42:31,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:42:31,494 INFO L354 Elim1Store]: treesize reduction 17, result has 63.0 percent of original size [2021-10-13 07:42:31,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 184 treesize of output 136 [2021-10-13 07:42:31,513 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:42:31,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 126 [2021-10-13 07:42:31,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2021-10-13 07:42:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:31,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [441482240] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:31,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848705453] [2021-10-13 07:42:31,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:31,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:42:31,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:42:31,709 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:42:31,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 07:42:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:42:31,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:42:31,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:31,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:42:31,928 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-13 07:42:31,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2021-10-13 07:42:31,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-10-13 07:42:31,994 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 07:42:31,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-10-13 07:42:32,477 INFO L354 Elim1Store]: treesize reduction 280, result has 10.3 percent of original size [2021-10-13 07:42:32,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 67 [2021-10-13 07:42:32,750 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-13 07:42:32,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 68 [2021-10-13 07:42:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:32,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:48,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:42:48,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:42:48,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:42:48,618 INFO L354 Elim1Store]: treesize reduction 110, result has 32.5 percent of original size [2021-10-13 07:42:48,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 1540 treesize of output 831 [2021-10-13 07:42:48,640 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:42:48,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 831 treesize of output 777 [2021-10-13 07:42:48,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1215 treesize of output 1065 [2021-10-13 07:42:48,686 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:42:48,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 539 treesize of output 517 [2021-10-13 07:42:48,716 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 07:42:48,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 677 treesize of output 671 [2021-10-13 07:42:48,751 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 07:42:48,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 659 treesize of output 653 [2021-10-13 07:42:48,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 641 treesize of output 639 [2021-10-13 07:42:48,779 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:42:48,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 183 [2021-10-13 07:42:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:48,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848705453] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:48,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:42:48,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 11, 11] total 33 [2021-10-13 07:42:48,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350954737] [2021-10-13 07:42:48,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-13 07:42:48,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:42:48,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-13 07:42:48,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=842, Unknown=10, NotChecked=0, Total=1056 [2021-10-13 07:42:48,902 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 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 07:42:54,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:42:54,001 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-10-13 07:42:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 07:42:54,002 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 07:42:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:42:54,004 INFO L225 Difference]: With dead ends: 35 [2021-10-13 07:42:54,004 INFO L226 Difference]: Without dead ends: 26 [2021-10-13 07:42:54,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 28279.3ms TimeCoverageRelationStatistics Valid=385, Invalid=1497, Unknown=10, NotChecked=0, Total=1892 [2021-10-13 07:42:54,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-13 07:42:54,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-10-13 07:42:54,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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 07:42:54,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-10-13 07:42:54,012 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2021-10-13 07:42:54,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:42:54,012 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-10-13 07:42:54,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 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 07:42:54,013 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-10-13 07:42:54,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:42:54,014 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:42:54,014 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:42:54,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:54,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:54,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-13 07:42:54,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:42:54,616 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:42:54,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:42:54,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2021-10-13 07:42:54,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:42:54,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895013851] [2021-10-13 07:42:54,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:42:54,618 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:42:54,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:42:54,619 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:42:54,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:42:54,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:42:54,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:42:54,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:42:54,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:55,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:55,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:42:55,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895013851] [2021-10-13 07:42:55,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895013851] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:55,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [160137489] [2021-10-13 07:42:55,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:42:55,541 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:42:55,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:42:55,546 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:42:55,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 07:42:55,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:42:55,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:42:55,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:42:55,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:56,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:56,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [160137489] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:56,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001714215] [2021-10-13 07:42:56,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:42:56,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:42:56,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:42:56,206 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:42:56,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 07:42:56,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:42:56,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:42:56,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:42:56,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:56,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:56,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001714215] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:56,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:42:56,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 9, 7] total 22 [2021-10-13 07:42:56,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916856178] [2021-10-13 07:42:56,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 07:42:56,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:42:56,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 07:42:56,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-10-13 07:42:56,836 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 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 07:42:58,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:42:58,389 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2021-10-13 07:42:58,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 07:42:58,390 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 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 18 [2021-10-13 07:42:58,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:42:58,391 INFO L225 Difference]: With dead ends: 54 [2021-10-13 07:42:58,391 INFO L226 Difference]: Without dead ends: 47 [2021-10-13 07:42:58,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1136.6ms TimeCoverageRelationStatistics Valid=325, Invalid=797, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 07:42:58,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-13 07:42:58,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2021-10-13 07:42:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 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 07:42:58,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-10-13 07:42:58,413 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 18 [2021-10-13 07:42:58,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:42:58,413 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-10-13 07:42:58,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 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 07:42:58,414 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-10-13 07:42:58,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 07:42:58,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:42:58,415 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:42:58,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:58,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:58,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-10-13 07:42:59,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:42:59,042 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:42:59,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:42:59,043 INFO L82 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2021-10-13 07:42:59,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:42:59,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475379466] [2021-10-13 07:42:59,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:42:59,043 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:42:59,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:42:59,044 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:42:59,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:42:59,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 07:42:59,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:42:59,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:42:59,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:59,553 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 07:42:59,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:59,719 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 07:42:59,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:42:59,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475379466] [2021-10-13 07:42:59,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475379466] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:59,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1350660543] [2021-10-13 07:42:59,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:42:59,721 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:42:59,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:42:59,725 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:42:59,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 07:43:00,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 07:43:00,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:43:00,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:43:00,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:00,250 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 07:43:00,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:00,338 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 07:43:00,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1350660543] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:00,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480005105] [2021-10-13 07:43:00,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:43:00,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:43:00,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:43:00,342 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:43:00,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 07:43:00,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 07:43:00,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:43:00,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:43:00,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:00,742 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 07:43:00,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:00,853 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 07:43:00,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480005105] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:00,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:43:00,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9, 7, 9, 7] total 14 [2021-10-13 07:43:00,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085695781] [2021-10-13 07:43:00,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 07:43:00,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:43:00,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 07:43:00,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:43:00,855 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:43:01,584 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-10-13 07:43:01,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:43:01,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 07:43:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:43:01,585 INFO L225 Difference]: With dead ends: 46 [2021-10-13 07:43:01,585 INFO L226 Difference]: Without dead ends: 34 [2021-10-13 07:43:01,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 446.2ms TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-10-13 07:43:01,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-13 07:43:01,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-10-13 07:43:01,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:01,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-10-13 07:43:01,593 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2021-10-13 07:43:01,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:43:01,593 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-10-13 07:43:01,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:01,594 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-10-13 07:43:01,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 07:43:01,595 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:43:01,595 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:43:01,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:01,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:02,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:02,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:43:02,208 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:43:02,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:43:02,209 INFO L82 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2021-10-13 07:43:02,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:43:02,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54514697] [2021-10-13 07:43:02,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 07:43:02,210 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:43:02,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:43:02,211 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:43:02,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 07:43:02,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 07:43:02,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-13 07:43:02,513 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:43:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:43:02,618 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:43:02,619 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:43:02,619 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:43:02,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:43:02,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:43:02,827 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:43:02,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:43:02 BoogieIcfgContainer [2021-10-13 07:43:02,873 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:43:02,874 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:43:02,874 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:43:02,874 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:43:02,875 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:42:15" (3/4) ... [2021-10-13 07:43:02,876 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:43:02,946 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e206d25-076b-40dd-b4b4-0574110adee0/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:43:02,947 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:43:02,948 INFO L168 Benchmark]: Toolchain (without parser) took 48058.73 ms. Allocated memory was 83.9 MB in the beginning and 157.3 MB in the end (delta: 73.4 MB). Free memory was 67.3 MB in the beginning and 96.0 MB in the end (delta: -28.7 MB). Peak memory consumption was 44.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:02,948 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 83.9 MB. Free memory is still 63.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:43:02,949 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.66 ms. Allocated memory is still 83.9 MB. Free memory was 67.1 MB in the beginning and 66.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:02,954 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.20 ms. Allocated memory is still 83.9 MB. Free memory was 66.0 MB in the beginning and 64.2 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:43:02,954 INFO L168 Benchmark]: Boogie Preprocessor took 47.11 ms. Allocated memory is still 83.9 MB. Free memory was 64.2 MB in the beginning and 62.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:02,955 INFO L168 Benchmark]: RCFGBuilder took 384.90 ms. Allocated memory is still 83.9 MB. Free memory was 62.9 MB in the beginning and 51.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:02,955 INFO L168 Benchmark]: TraceAbstraction took 47213.08 ms. Allocated memory was 83.9 MB in the beginning and 157.3 MB in the end (delta: 73.4 MB). Free memory was 51.0 MB in the beginning and 98.1 MB in the end (delta: -47.1 MB). Peak memory consumption was 26.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:02,956 INFO L168 Benchmark]: Witness Printer took 73.05 ms. Allocated memory is still 157.3 MB. Free memory was 98.1 MB in the beginning and 96.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:43:02,958 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 83.9 MB. Free memory is still 63.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 298.66 ms. Allocated memory is still 83.9 MB. Free memory was 67.1 MB in the beginning and 66.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.20 ms. Allocated memory is still 83.9 MB. Free memory was 66.0 MB in the beginning and 64.2 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.11 ms. Allocated memory is still 83.9 MB. Free memory was 64.2 MB in the beginning and 62.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 384.90 ms. Allocated memory is still 83.9 MB. Free memory was 62.9 MB in the beginning and 51.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 47213.08 ms. Allocated memory was 83.9 MB in the beginning and 157.3 MB in the end (delta: 73.4 MB). Free memory was 51.0 MB in the beginning and 98.1 MB in the end (delta: -47.1 MB). Peak memory consumption was 26.5 MB. Max. memory is 16.1 GB. * Witness Printer took 73.05 ms. Allocated memory is still 157.3 MB. Free memory was 98.1 MB in the beginning and 96.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=2] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [N=2] [L32] COND TRUE i