./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/brs2.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_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/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_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/brs2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/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_6233dbe1-06f7-4254-9a54-376cfe804ed9/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 1b27fdd299a28d370d55195d89f8bfee7ce48e24 ............................................................................................................................................................................................................................................................................................................................................................................................................. 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_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/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_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/brs2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/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_6233dbe1-06f7-4254-9a54-376cfe804ed9/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 1b27fdd299a28d370d55195d89f8bfee7ce48e24 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:15:15,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:15:15,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:15:16,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:15:16,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:15:16,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:15:16,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:15:16,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:15:16,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:15:16,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:15:16,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:15:16,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:15:16,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:15:16,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:15:16,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:15:16,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:15:16,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:15:16,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:15:16,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:15:16,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:15:16,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:15:16,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:15:16,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:15:16,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:15:16,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:15:16,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:15:16,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:15:16,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:15:16,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:15:16,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:15:16,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:15:16,113 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:15:16,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:15:16,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:15:16,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:15:16,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:15:16,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:15:16,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:15:16,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:15:16,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:15:16,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:15:16,122 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:15:16,168 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:15:16,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:15:16,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:15:16,171 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:15:16,171 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:15:16,171 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:15:16,171 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:15:16,172 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:15:16,172 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:15:16,172 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:15:16,173 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:15:16,173 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:15:16,174 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:15:16,174 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:15:16,174 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:15:16,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:15:16,176 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:15:16,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:15:16,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:15:16,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:15:16,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:15:16,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:15:16,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:15:16,178 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:15:16,178 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:15:16,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:15:16,178 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:15:16,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:15:16,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:15:16,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:15:16,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:15:16,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:15:16,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:15:16,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:15:16,182 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:15:16,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:15:16,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:15:16,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:15:16,183 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:15:16,183 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_6233dbe1-06f7-4254-9a54-376cfe804ed9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b27fdd299a28d370d55195d89f8bfee7ce48e24 [2021-10-13 08:15:16,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:15:16,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:15:16,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:15:16,520 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:15:16,520 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:15:16,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-fpi/brs2.c [2021-10-13 08:15:16,595 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/data/019d54571/a1dbf6fb7dbd457b8e91ae05dd2dd296/FLAGd07128b1c [2021-10-13 08:15:17,130 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:15:17,131 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/sv-benchmarks/c/array-fpi/brs2.c [2021-10-13 08:15:17,137 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/data/019d54571/a1dbf6fb7dbd457b8e91ae05dd2dd296/FLAGd07128b1c [2021-10-13 08:15:17,488 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/data/019d54571/a1dbf6fb7dbd457b8e91ae05dd2dd296 [2021-10-13 08:15:17,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:15:17,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:15:17,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:15:17,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:15:17,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:15:17,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:15:17" (1/1) ... [2021-10-13 08:15:17,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c2d9db3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:17, skipping insertion in model container [2021-10-13 08:15:17,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:15:17" (1/1) ... [2021-10-13 08:15:17,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:15:17,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:15:17,710 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_6233dbe1-06f7-4254-9a54-376cfe804ed9/sv-benchmarks/c/array-fpi/brs2.c[587,600] [2021-10-13 08:15:17,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:15:17,733 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:15:17,746 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_6233dbe1-06f7-4254-9a54-376cfe804ed9/sv-benchmarks/c/array-fpi/brs2.c[587,600] [2021-10-13 08:15:17,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:15:17,765 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:15:17,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:17 WrapperNode [2021-10-13 08:15:17,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:15:17,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:15:17,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:15:17,767 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:15:17,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:17" (1/1) ... [2021-10-13 08:15:17,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:17" (1/1) ... [2021-10-13 08:15:17,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:15:17,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:15:17,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:15:17,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:15:17,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:17" (1/1) ... [2021-10-13 08:15:17,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:17" (1/1) ... [2021-10-13 08:15:17,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:17" (1/1) ... [2021-10-13 08:15:17,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:17" (1/1) ... [2021-10-13 08:15:17,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:17" (1/1) ... [2021-10-13 08:15:17,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:17" (1/1) ... [2021-10-13 08:15:17,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:17" (1/1) ... [2021-10-13 08:15:17,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:15:17,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:15:17,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:15:17,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:15:17,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:17" (1/1) ... [2021-10-13 08:15:17,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:15:17,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:15:17,867 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:15:17,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:15:17,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:15:17,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:15:17,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 08:15:17,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 08:15:17,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:15:17,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:15:17,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 08:15:17,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 08:15:18,354 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:15:18,355 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-13 08:15:18,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:15:18 BoogieIcfgContainer [2021-10-13 08:15:18,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:15:18,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:15:18,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:15:18,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:15:18,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:15:17" (1/3) ... [2021-10-13 08:15:18,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@764a422a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:15:18, skipping insertion in model container [2021-10-13 08:15:18,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:17" (2/3) ... [2021-10-13 08:15:18,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@764a422a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:15:18, skipping insertion in model container [2021-10-13 08:15:18,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:15:18" (3/3) ... [2021-10-13 08:15:18,377 INFO L111 eAbstractionObserver]: Analyzing ICFG brs2.c [2021-10-13 08:15:18,385 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:15:18,386 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:15:18,430 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:15:18,437 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 08:15:18,437 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:15:18,451 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 08:15:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 08:15:18,456 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:15:18,457 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 08:15:18,457 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:15:18,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:15:18,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1448994786, now seen corresponding path program 1 times [2021-10-13 08:15:18,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:15:18,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289400143] [2021-10-13 08:15:18,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:15:18,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:15:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:15:18,657 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 08:15:18,657 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:15:18,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289400143] [2021-10-13 08:15:18,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289400143] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:15:18,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:15:18,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:15:18,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348348468] [2021-10-13 08:15:18,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:15:18,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:15:18,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:15:18,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:15:18,680 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 08:15:18,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:15:18,712 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-10-13 08:15:18,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:15:18,713 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 08:15:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:15:18,721 INFO L225 Difference]: With dead ends: 18 [2021-10-13 08:15:18,721 INFO L226 Difference]: Without dead ends: 8 [2021-10-13 08:15:18,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:15:18,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-13 08:15:18,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-13 08:15:18,752 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 08:15:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-10-13 08:15:18,754 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-10-13 08:15:18,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:15:18,754 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-13 08:15:18,754 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 08:15:18,755 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-10-13 08:15:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 08:15:18,755 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:15:18,755 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:15:18,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:15:18,756 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:15:18,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:15:18,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1973441861, now seen corresponding path program 1 times [2021-10-13 08:15:18,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:15:18,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585856098] [2021-10-13 08:15:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:15:18,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:15:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:15:18,829 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 08:15:18,829 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:15:18,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585856098] [2021-10-13 08:15:18,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585856098] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:15:18,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:15:18,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 08:15:18,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847618097] [2021-10-13 08:15:18,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:15:18,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:15:18,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:15:18,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:15:18,833 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 08:15:18,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:15:18,857 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-10-13 08:15:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:15:18,857 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 08:15:18,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:15:18,858 INFO L225 Difference]: With dead ends: 12 [2021-10-13 08:15:18,858 INFO L226 Difference]: Without dead ends: 9 [2021-10-13 08:15:18,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:15:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-13 08:15:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-13 08:15:18,876 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 08:15:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-13 08:15:18,876 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-10-13 08:15:18,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:15:18,877 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-13 08:15:18,877 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 08:15:18,877 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-13 08:15:18,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:15:18,878 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:15:18,878 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:15:18,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 08:15:18,878 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:15:18,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:15:18,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1046873979, now seen corresponding path program 1 times [2021-10-13 08:15:18,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:15:18,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347530946] [2021-10-13 08:15:18,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:15:18,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:15:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:15:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:15:18,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:15:18,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347530946] [2021-10-13 08:15:18,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347530946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:15:18,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167614696] [2021-10-13 08:15:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:15:18,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:15:18,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:15:18,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:15:19,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:15:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:15:19,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:15:19,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:15:19,151 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 08:15:19,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-10-13 08:15:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:15:19,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:15:19,433 INFO L354 Elim1Store]: treesize reduction 48, result has 64.2 percent of original size [2021-10-13 08:15:19,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 66 treesize of output 121 [2021-10-13 08:15:19,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:15:19,701 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 71 treesize of output 70 [2021-10-13 08:15:19,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:15:19,748 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 82 treesize of output 77 [2021-10-13 08:15:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:15:19,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167614696] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:15:19,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1774165433] [2021-10-13 08:15:19,839 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-13 08:15:19,839 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:15:19,843 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:15:19,849 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:15:19,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:15:19,878 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:15:19,880 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:15:19,881 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:15:19,882 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 08:15:19,883 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:15:19,883 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:15:19,884 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 08:15:19,924 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-10-13 08:15:19,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:15:19,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:15:19,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:15:19,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 08:15:19,971 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:15:19,972 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 08:15:19,973 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:15:19,973 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 08:15:19,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:15:19,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:15:20,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:15:20,023 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:15:20,026 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-10-13 08:15:20,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 08:15:20,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:185, output treesize:188 [2021-10-13 08:15:20,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:15:20,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:15:20,251 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_20| 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 08:15:20,254 INFO L168 Benchmark]: Toolchain (without parser) took 2761.43 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 71.0 MB in the beginning and 104.4 MB in the end (delta: -33.4 MB). Peak memory consumption was 45.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:15:20,255 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 113.2 MB. Free memory is still 87.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:15:20,255 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.27 ms. Allocated memory is still 113.2 MB. Free memory was 70.8 MB in the beginning and 86.6 MB in the end (delta: -15.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:15:20,256 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.28 ms. Allocated memory is still 113.2 MB. Free memory was 86.6 MB in the beginning and 85.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:15:20,256 INFO L168 Benchmark]: Boogie Preprocessor took 27.86 ms. Allocated memory is still 113.2 MB. Free memory was 85.0 MB in the beginning and 83.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:15:20,257 INFO L168 Benchmark]: RCFGBuilder took 524.62 ms. Allocated memory is still 113.2 MB. Free memory was 83.6 MB in the beginning and 68.5 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:15:20,258 INFO L168 Benchmark]: TraceAbstraction took 1893.22 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 68.2 MB in the beginning and 104.4 MB in the end (delta: -36.2 MB). Peak memory consumption was 45.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:15:20,261 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 113.2 MB. Free memory is still 87.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 272.27 ms. Allocated memory is still 113.2 MB. Free memory was 70.8 MB in the beginning and 86.6 MB in the end (delta: -15.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.28 ms. Allocated memory is still 113.2 MB. Free memory was 86.6 MB in the beginning and 85.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.86 ms. Allocated memory is still 113.2 MB. Free memory was 85.0 MB in the beginning and 83.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 524.62 ms. Allocated memory is still 113.2 MB. Free memory was 83.6 MB in the beginning and 68.5 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1893.22 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 68.2 MB in the beginning and 104.4 MB in the end (delta: -36.2 MB). Peak memory consumption was 45.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_20| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_20|: 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 08:15:20,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:15:22,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:15:22,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:15:22,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:15:22,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:15:22,752 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:15:22,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:15:22,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:15:22,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:15:22,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:15:22,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:15:22,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:15:22,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:15:22,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:15:22,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:15:22,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:15:22,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:15:22,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:15:22,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:15:22,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:15:22,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:15:22,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:15:22,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:15:22,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:15:22,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:15:22,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:15:22,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:15:22,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:15:22,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:15:22,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:15:22,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:15:22,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:15:22,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:15:22,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:15:22,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:15:22,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:15:22,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:15:22,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:15:22,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:15:22,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:15:22,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:15:22,810 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 08:15:22,858 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:15:22,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:15:22,859 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:15:22,859 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:15:22,860 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:15:22,860 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:15:22,860 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:15:22,860 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:15:22,861 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:15:22,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:15:22,869 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:15:22,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:15:22,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:15:22,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:15:22,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:15:22,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:15:22,870 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:15:22,870 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:15:22,870 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:15:22,870 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:15:22,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:15:22,871 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:15:22,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:15:22,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:15:22,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:15:22,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:15:22,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:15:22,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:15:22,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:15:22,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:15:22,873 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:15:22,873 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:15:22,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:15:22,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:15:22,874 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:15:22,874 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_6233dbe1-06f7-4254-9a54-376cfe804ed9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b27fdd299a28d370d55195d89f8bfee7ce48e24 [2021-10-13 08:15:23,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:15:23,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:15:23,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:15:23,319 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:15:23,321 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:15:23,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-fpi/brs2.c [2021-10-13 08:15:23,403 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/data/cd7094a0c/40ab0e9ad68a4483a063f1915ea87e4e/FLAGb97ee0aac [2021-10-13 08:15:24,041 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:15:24,047 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/sv-benchmarks/c/array-fpi/brs2.c [2021-10-13 08:15:24,057 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/data/cd7094a0c/40ab0e9ad68a4483a063f1915ea87e4e/FLAGb97ee0aac [2021-10-13 08:15:24,071 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/data/cd7094a0c/40ab0e9ad68a4483a063f1915ea87e4e [2021-10-13 08:15:24,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:15:24,075 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:15:24,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:15:24,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:15:24,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:15:24,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:15:24" (1/1) ... [2021-10-13 08:15:24,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fca1fc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:24, skipping insertion in model container [2021-10-13 08:15:24,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:15:24" (1/1) ... [2021-10-13 08:15:24,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:15:24,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:15:24,271 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_6233dbe1-06f7-4254-9a54-376cfe804ed9/sv-benchmarks/c/array-fpi/brs2.c[587,600] [2021-10-13 08:15:24,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:15:24,300 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:15:24,322 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_6233dbe1-06f7-4254-9a54-376cfe804ed9/sv-benchmarks/c/array-fpi/brs2.c[587,600] [2021-10-13 08:15:24,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:15:24,358 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:15:24,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:24 WrapperNode [2021-10-13 08:15:24,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:15:24,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:15:24,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:15:24,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:15:24,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:24" (1/1) ... [2021-10-13 08:15:24,399 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:24" (1/1) ... [2021-10-13 08:15:24,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:15:24,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:15:24,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:15:24,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:15:24,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:24" (1/1) ... [2021-10-13 08:15:24,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:24" (1/1) ... [2021-10-13 08:15:24,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:24" (1/1) ... [2021-10-13 08:15:24,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:24" (1/1) ... [2021-10-13 08:15:24,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:24" (1/1) ... [2021-10-13 08:15:24,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:24" (1/1) ... [2021-10-13 08:15:24,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:24" (1/1) ... [2021-10-13 08:15:24,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:15:24,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:15:24,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:15:24,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:15:24,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:24" (1/1) ... [2021-10-13 08:15:24,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:15:24,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:15:24,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:15:24,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:15:24,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 08:15:24,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:15:24,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-10-13 08:15:24,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 08:15:24,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 08:15:24,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:15:24,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:15:24,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-10-13 08:15:24,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 08:15:24,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 08:15:24,861 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:15:24,861 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-13 08:15:24,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:15:24 BoogieIcfgContainer [2021-10-13 08:15:24,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:15:24,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:15:24,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:15:24,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:15:24,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:15:24" (1/3) ... [2021-10-13 08:15:24,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271b1c8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:15:24, skipping insertion in model container [2021-10-13 08:15:24,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:15:24" (2/3) ... [2021-10-13 08:15:24,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271b1c8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:15:24, skipping insertion in model container [2021-10-13 08:15:24,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:15:24" (3/3) ... [2021-10-13 08:15:24,872 INFO L111 eAbstractionObserver]: Analyzing ICFG brs2.c [2021-10-13 08:15:24,877 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:15:24,877 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:15:24,935 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:15:24,956 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 08:15:24,956 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:15:24,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:15:24,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 08:15:24,986 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:15:24,987 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:15:24,988 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:15:24,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:15:24,993 INFO L82 PathProgramCache]: Analyzing trace with hash 361760665, now seen corresponding path program 1 times [2021-10-13 08:15:25,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:15:25,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20326948] [2021-10-13 08:15:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:15:25,014 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:15:25,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:15:25,088 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:15:25,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:15:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:15:25,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 08:15:25,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:15:25,258 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 08:15:25,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:15:25,291 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 08:15:25,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:15:25,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20326948] [2021-10-13 08:15:25,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20326948] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:15:25,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:15:25,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:15:25,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225991127] [2021-10-13 08:15:25,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:15:25,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:15:25,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:15:25,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:15:25,316 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 08:15:25,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:15:25,331 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2021-10-13 08:15:25,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:15:25,333 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 08:15:25,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:15:25,341 INFO L225 Difference]: With dead ends: 36 [2021-10-13 08:15:25,342 INFO L226 Difference]: Without dead ends: 16 [2021-10-13 08:15:25,344 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 08:15:25,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-13 08:15:25,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-13 08:15:25,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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 08:15:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-10-13 08:15:25,380 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2021-10-13 08:15:25,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:15:25,381 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-10-13 08:15:25,381 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 08:15:25,381 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-10-13 08:15:25,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 08:15:25,382 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:15:25,383 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:15:25,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:15:25,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:15:25,607 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:15:25,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:15:25,608 INFO L82 PathProgramCache]: Analyzing trace with hash -447913662, now seen corresponding path program 1 times [2021-10-13 08:15:25,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:15:25,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279366513] [2021-10-13 08:15:25,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:15:25,609 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:15:25,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:15:25,613 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:15:25,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:15:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:15:25,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:15:25,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:15:25,971 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 08:15:25,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:15:26,074 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 08:15:26,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:15:26,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279366513] [2021-10-13 08:15:26,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279366513] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:15:26,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:15:26,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 08:15:26,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138602393] [2021-10-13 08:15:26,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:15:26,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:15:26,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:15:26,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:15:26,084 INFO L87 Difference]: Start difference. First operand 16 states and 19 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 08:15:26,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:15:26,399 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-10-13 08:15:26,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:15:26,401 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 08:15:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:15:26,402 INFO L225 Difference]: With dead ends: 33 [2021-10-13 08:15:26,402 INFO L226 Difference]: Without dead ends: 22 [2021-10-13 08:15:26,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-10-13 08:15:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-13 08:15:26,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-10-13 08:15:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:15:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-10-13 08:15:26,414 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2021-10-13 08:15:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:15:26,415 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-10-13 08:15:26,415 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 08:15:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-10-13 08:15:26,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 08:15:26,417 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:15:26,417 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:15:26,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:15:26,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:15:26,618 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:15:26,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:15:26,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1044113915, now seen corresponding path program 1 times [2021-10-13 08:15:26,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:15:26,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603847743] [2021-10-13 08:15:26,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:15:26,620 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:15:26,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:15:26,622 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:15:26,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:15:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:15:26,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 08:15:26,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:15:27,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:15:27,100 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-13 08:15:27,102 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 1 case distinctions, treesize of input 20 treesize of output 21 [2021-10-13 08:15:27,290 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 08:15:27,292 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 75 treesize of output 45 [2021-10-13 08:15:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:15:27,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:15:27,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-10-13 08:15:27,773 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 08:15:27,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:15:27,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603847743] [2021-10-13 08:15:27,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603847743] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:15:27,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [339646050] [2021-10-13 08:15:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:15:27,775 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:15:27,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:15:27,780 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:15:27,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 08:15:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:15:27,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 08:15:27,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:15:28,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:15:28,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:15:28,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2021-10-13 08:15:28,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:15:28,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 69 treesize of output 45 [2021-10-13 08:15:28,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:15:28,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:15:28,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-10-13 08:15:28,643 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 08:15:28,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [339646050] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:15:28,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085593894] [2021-10-13 08:15:28,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:15:28,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:15:28,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:15:28,647 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:15:28,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 08:15:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:15:28,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 08:15:28,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:15:28,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:15:28,975 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-13 08:15:28,976 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 1 case distinctions, treesize of input 20 treesize of output 21 [2021-10-13 08:15:29,132 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 08:15:29,133 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 75 treesize of output 45 [2021-10-13 08:15:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:15:29,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:15:29,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-10-13 08:15:29,331 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 08:15:29,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085593894] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:15:29,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:15:29,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 9, 9] total 21 [2021-10-13 08:15:29,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592857550] [2021-10-13 08:15:29,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 08:15:29,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:15:29,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 08:15:29,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-10-13 08:15:29,337 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 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 08:15:30,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:15:30,535 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2021-10-13 08:15:30,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 08:15:30,536 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 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 17 [2021-10-13 08:15:30,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:15:30,537 INFO L225 Difference]: With dead ends: 50 [2021-10-13 08:15:30,537 INFO L226 Difference]: Without dead ends: 28 [2021-10-13 08:15:30,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1335.5ms TimeCoverageRelationStatistics Valid=346, Invalid=844, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 08:15:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-13 08:15:30,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-10-13 08:15:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:15:30,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-10-13 08:15:30,545 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2021-10-13 08:15:30,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:15:30,545 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-10-13 08:15:30,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 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 08:15:30,546 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-10-13 08:15:30,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 08:15:30,547 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:15:30,547 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:15:30,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:15:30,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:15:30,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 08:15:31,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:15:31,150 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:15:31,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:15:31,151 INFO L82 PathProgramCache]: Analyzing trace with hash 168847774, now seen corresponding path program 1 times [2021-10-13 08:15:31,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:15:31,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451323536] [2021-10-13 08:15:31,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:15:31,152 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:15:31,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:15:31,154 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:15:31,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 08:15:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:15:31,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 08:15:31,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:15:31,397 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 08:15:31,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 08:15:31,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:15:31,741 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-13 08:15:31,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2021-10-13 08:15:32,077 INFO L354 Elim1Store]: treesize reduction 152, result has 13.1 percent of original size [2021-10-13 08:15:32,078 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 94 treesize of output 55 [2021-10-13 08:15:32,378 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-13 08:15:32,379 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 115 treesize of output 67 [2021-10-13 08:15:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:15:32,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:15:34,907 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#sum~0.offset| (_ BitVec 32))) (bvsle (let ((.cse5 ((_ sign_extend 32) (_ bv0 32)))) (let ((.cse3 (bvadd (_ bv4 32) |ULTIMATE.start_main_~#sum~0.offset|)) (.cse4 ((_ extract 63 32) .cse5))) (let ((.cse1 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|) |ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse5)) .cse3 .cse4))) (let ((.cse2 (bvadd ((_ sign_extend 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| .cse1) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)) c_ULTIMATE.start_main_~a~0.offset))) (concat .cse4 (select .cse1 |ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse0 ((_ extract 63 32) .cse2))) (concat .cse0 (select (store (store .cse1 |ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse2)) .cse3 .cse0) |ULTIMATE.start_main_~#sum~0.offset|))))))) ((_ sign_extend 32) (bvmul c_~N~0 (_ bv2 32))))) is different from false [2021-10-13 08:15:36,004 INFO L354 Elim1Store]: treesize reduction 24, result has 55.6 percent of original size [2021-10-13 08:15:36,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23206 treesize of output 16803 [2021-10-13 08:15:36,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:15:36,086 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 16803 treesize of output 15783 [2021-10-13 08:15:36,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:15:36,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451323536] [2021-10-13 08:15:36,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 08:15:36,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1002734675] [2021-10-13 08:15:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:15:36,162 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:15:36,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:15:36,166 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:15:36,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 08:15:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:15:36,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 08:15:36,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:15:37,420 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 15 treesize of output 11 [2021-10-13 08:15:38,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:15:38,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:15:38,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:15:38,111 INFO L354 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2021-10-13 08:15:38,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2021-10-13 08:15:38,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:15:38,714 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-10-13 08:15:38,714 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 08:15:39,095 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 08:15:39,096 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 97 treesize of output 69 [2021-10-13 08:15:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:15:39,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:15:42,590 INFO L354 Elim1Store]: treesize reduction 24, result has 55.6 percent of original size [2021-10-13 08:15:42,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23206 treesize of output 16803 [2021-10-13 08:15:42,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:15:42,654 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 16803 treesize of output 15783 [2021-10-13 08:15:42,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 08:15:42,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432364642] [2021-10-13 08:15:42,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:15:42,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:15:42,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:15:42,720 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:15:42,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 08:15:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:15:42,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 08:15:42,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:15:43,015 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 13 treesize of output 11 [2021-10-13 08:15:43,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 08:15:44,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:15:44,068 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-13 08:15:44,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2021-10-13 08:15:44,527 INFO L354 Elim1Store]: treesize reduction 134, result has 13.5 percent of original size [2021-10-13 08:15:44,527 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 08:15:44,815 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-13 08:15:44,815 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 109 treesize of output 67 [2021-10-13 08:15:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:15:44,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:15:46,328 INFO L354 Elim1Store]: treesize reduction 24, result has 55.6 percent of original size [2021-10-13 08:15:46,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23206 treesize of output 16803 [2021-10-13 08:15:46,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:15:46,401 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 16803 treesize of output 15783 [2021-10-13 08:15:46,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 08:15:46,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:15:46,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 08:15:46,461 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 08:15:46,461 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 08:15:46,469 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:15:46,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 08:15:46,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-13 08:15:46,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-13 08:15:47,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6233dbe1-06f7-4254-9a54-376cfe804ed9/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:15:47,105 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:15:47,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:15:47 BoogieIcfgContainer [2021-10-13 08:15:47,120 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:15:47,120 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:15:47,121 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:15:47,121 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:15:47,121 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:15:24" (3/4) ... [2021-10-13 08:15:47,126 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 08:15:47,126 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:15:47,127 INFO L168 Benchmark]: Toolchain (without parser) took 23051.45 ms. Allocated memory was 65.0 MB in the beginning and 113.2 MB in the end (delta: 48.2 MB). Free memory was 47.6 MB in the beginning and 65.2 MB in the end (delta: -17.6 MB). Peak memory consumption was 30.8 MB. Max. memory is 16.1 GB. [2021-10-13 08:15:47,130 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 65.0 MB. Free memory was 46.3 MB in the beginning and 46.3 MB in the end (delta: 54.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:15:47,131 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.10 ms. Allocated memory is still 65.0 MB. Free memory was 47.4 MB in the beginning and 48.7 MB in the end (delta: -1.2 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2021-10-13 08:15:47,131 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.44 ms. Allocated memory is still 65.0 MB. Free memory was 48.7 MB in the beginning and 46.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:15:47,132 INFO L168 Benchmark]: Boogie Preprocessor took 30.06 ms. Allocated memory is still 65.0 MB. Free memory was 46.8 MB in the beginning and 45.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:15:47,132 INFO L168 Benchmark]: RCFGBuilder took 411.97 ms. Allocated memory is still 65.0 MB. Free memory was 45.3 MB in the beginning and 33.8 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:15:47,133 INFO L168 Benchmark]: TraceAbstraction took 22254.91 ms. Allocated memory was 65.0 MB in the beginning and 113.2 MB in the end (delta: 48.2 MB). Free memory was 33.4 MB in the beginning and 65.2 MB in the end (delta: -31.7 MB). Peak memory consumption was 53.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:15:47,134 INFO L168 Benchmark]: Witness Printer took 5.73 ms. Allocated memory is still 113.2 MB. Free memory is still 65.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:15:47,137 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 65.0 MB. Free memory was 46.3 MB in the beginning and 46.3 MB in the end (delta: 54.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 282.10 ms. Allocated memory is still 65.0 MB. Free memory was 47.4 MB in the beginning and 48.7 MB in the end (delta: -1.2 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.44 ms. Allocated memory is still 65.0 MB. Free memory was 48.7 MB in the beginning and 46.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.06 ms. Allocated memory is still 65.0 MB. Free memory was 46.8 MB in the beginning and 45.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 411.97 ms. Allocated memory is still 65.0 MB. Free memory was 45.3 MB in the beginning and 33.8 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22254.91 ms. Allocated memory was 65.0 MB in the beginning and 113.2 MB in the end (delta: 48.2 MB). Free memory was 33.4 MB in the beginning and 65.2 MB in the end (delta: -31.7 MB). Peak memory consumption was 53.1 MB. Max. memory is 16.1 GB. * Witness Printer took 5.73 ms. Allocated memory is still 113.2 MB. Free memory is still 65.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 [L31] COND TRUE i