./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_1b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d0d0c57-fe94-4aec-8134-f969990b55c2/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d0d0c57-fe94-4aec-8134-f969990b55c2/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d0d0c57-fe94-4aec-8134-f969990b55c2/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d0d0c57-fe94-4aec-8134-f969990b55c2/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_1b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d0d0c57-fe94-4aec-8134-f969990b55c2/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d0d0c57-fe94-4aec-8134-f969990b55c2/bin/utaipan-WLngWcDbfI --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 c1836be5ce35667bc02ed393f2cbc8396b48b5bb .................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:23:20,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:23:20,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:23:20,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:23:20,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:23:20,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:23:20,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:23:20,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:23:20,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:23:20,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:23:20,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:23:20,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:23:20,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:23:20,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:23:20,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:23:20,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:23:20,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:23:20,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:23:20,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:23:20,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:23:20,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:23:20,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:23:20,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:23:20,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:23:20,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:23:20,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:23:20,186 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:23:20,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:23:20,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:23:20,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:23:20,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:23:20,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:23:20,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:23:20,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:23:20,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:23:20,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:23:20,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:23:20,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:23:20,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:23:20,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:23:20,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:23:20,205 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d0d0c57-fe94-4aec-8134-f969990b55c2/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:23:20,250 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:23:20,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:23:20,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:23:20,252 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:23:20,252 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:23:20,253 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:23:20,253 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:23:20,253 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:23:20,253 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:23:20,254 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:23:20,254 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:23:20,254 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:23:20,254 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:23:20,255 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:23:20,255 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:23:20,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:23:20,256 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:23:20,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:23:20,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:23:20,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:23:20,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:23:20,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:23:20,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:23:20,258 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:23:20,258 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:23:20,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:23:20,258 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:23:20,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:23:20,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:23:20,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:23:20,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:20,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:23:20,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:23:20,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:23:20,261 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:23:20,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:23:20,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:23:20,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:23:20,261 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:23:20,262 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_0d0d0c57-fe94-4aec-8134-f969990b55c2/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d0d0c57-fe94-4aec-8134-f969990b55c2/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1836be5ce35667bc02ed393f2cbc8396b48b5bb [2021-10-11 02:23:20,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:23:20,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:23:20,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:23:20,677 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:23:20,678 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:23:20,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d0d0c57-fe94-4aec-8134-f969990b55c2/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/loop-simple/nested_1b.c [2021-10-11 02:23:20,766 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d0d0c57-fe94-4aec-8134-f969990b55c2/bin/utaipan-WLngWcDbfI/data/e70f226ae/5d8e7edd55de46c9b0d7681fd7259264/FLAG4a2080913 [2021-10-11 02:23:21,335 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:23:21,338 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d0d0c57-fe94-4aec-8134-f969990b55c2/sv-benchmarks/c/loop-simple/nested_1b.c [2021-10-11 02:23:21,348 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d0d0c57-fe94-4aec-8134-f969990b55c2/bin/utaipan-WLngWcDbfI/data/e70f226ae/5d8e7edd55de46c9b0d7681fd7259264/FLAG4a2080913 [2021-10-11 02:23:21,691 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d0d0c57-fe94-4aec-8134-f969990b55c2/bin/utaipan-WLngWcDbfI/data/e70f226ae/5d8e7edd55de46c9b0d7681fd7259264 [2021-10-11 02:23:21,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:23:21,696 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:23:21,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:21,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:23:21,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:23:21,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:21" (1/1) ... [2021-10-11 02:23:21,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4de9930c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:21, skipping insertion in model container [2021-10-11 02:23:21,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:21" (1/1) ... [2021-10-11 02:23:21,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:23:21,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:23:21,982 WARN L226 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_0d0d0c57-fe94-4aec-8134-f969990b55c2/sv-benchmarks/c/loop-simple/nested_1b.c[674,687] [2021-10-11 02:23:21,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:22,015 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:23:22,036 WARN L226 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_0d0d0c57-fe94-4aec-8134-f969990b55c2/sv-benchmarks/c/loop-simple/nested_1b.c[674,687] [2021-10-11 02:23:22,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:22,054 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:23:22,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:22 WrapperNode [2021-10-11 02:23:22,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:22,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:22,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:23:22,059 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:23:22,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:22" (1/1) ... [2021-10-11 02:23:22,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:22" (1/1) ... [2021-10-11 02:23:22,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:22,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:23:22,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:23:22,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:23:22,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:22" (1/1) ... [2021-10-11 02:23:22,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:22" (1/1) ... [2021-10-11 02:23:22,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:22" (1/1) ... [2021-10-11 02:23:22,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:22" (1/1) ... [2021-10-11 02:23:22,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:22" (1/1) ... [2021-10-11 02:23:22,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:22" (1/1) ... [2021-10-11 02:23:22,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:22" (1/1) ... [2021-10-11 02:23:22,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:23:22,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:23:22,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:23:22,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:23:22,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:22" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d0d0c57-fe94-4aec-8134-f969990b55c2/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:22,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:23:22,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:23:22,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:23:22,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:23:22,627 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:23:22,627 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-11 02:23:22,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:22 BoogieIcfgContainer [2021-10-11 02:23:22,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:23:22,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:23:22,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:23:22,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:23:22,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:23:21" (1/3) ... [2021-10-11 02:23:22,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c45379d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:22, skipping insertion in model container [2021-10-11 02:23:22,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:22" (2/3) ... [2021-10-11 02:23:22,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c45379d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:22, skipping insertion in model container [2021-10-11 02:23:22,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:22" (3/3) ... [2021-10-11 02:23:22,641 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1b.c [2021-10-11 02:23:22,656 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:23:22,660 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:23:22,673 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:23:22,699 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:23:22,699 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:23:22,699 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:23:22,699 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:23:22,700 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:23:22,700 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:23:22,700 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:23:22,700 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:23:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2021-10-11 02:23:22,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:23:22,718 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:22,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:23:22,719 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:22,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:22,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1788998, now seen corresponding path program 1 times [2021-10-11 02:23:22,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:22,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705783872] [2021-10-11 02:23:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:22,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705783872] [2021-10-11 02:23:22,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:22,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:23:22,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47276009] [2021-10-11 02:23:22,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:23:22,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:23,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:23:23,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:23,016 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2021-10-11 02:23:23,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:23,065 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-10-11 02:23:23,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:23:23,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2021-10-11 02:23:23,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:23,088 INFO L225 Difference]: With dead ends: 13 [2021-10-11 02:23:23,092 INFO L226 Difference]: Without dead ends: 6 [2021-10-11 02:23:23,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:23,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-10-11 02:23:23,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-10-11 02:23:23,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-11 02:23:23,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-10-11 02:23:23,133 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-10-11 02:23:23,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:23,134 INFO L481 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-10-11 02:23:23,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:23:23,134 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-10-11 02:23:23,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:23:23,135 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:23,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:23:23,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:23:23,136 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:23,142 INFO L82 PathProgramCache]: Analyzing trace with hash 55383007, now seen corresponding path program 1 times [2021-10-11 02:23:23,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:23,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281957193] [2021-10-11 02:23:23,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:23,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281957193] [2021-10-11 02:23:23,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000187248] [2021-10-11 02:23:23,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d0d0c57-fe94-4aec-8134-f969990b55c2/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:23,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:23:23,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:23,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:23,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1793487947] [2021-10-11 02:23:23,521 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-11 02:23:23,521 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:23:23,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:23:23,532 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:23:23,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:23:24,078 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:23:24,325 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:24,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:23:24,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-10-11 02:23:24,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712369378] [2021-10-11 02:23:24,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:23:24,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:24,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:23:24,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:23:24,330 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 7 states. [2021-10-11 02:23:24,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:24,350 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-10-11 02:23:24,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:23:24,361 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 5 [2021-10-11 02:23:24,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:24,362 INFO L225 Difference]: With dead ends: 12 [2021-10-11 02:23:24,362 INFO L226 Difference]: Without dead ends: 9 [2021-10-11 02:23:24,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:23:24,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-11 02:23:24,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-11 02:23:24,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 02:23:24,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-11 02:23:24,366 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-10-11 02:23:24,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:24,367 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-11 02:23:24,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:23:24,367 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-11 02:23:24,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:23:24,368 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:24,368 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-10-11 02:23:24,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-11 02:23:24,584 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:24,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:24,585 INFO L82 PathProgramCache]: Analyzing trace with hash 572320390, now seen corresponding path program 2 times [2021-10-11 02:23:24,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:24,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993845617] [2021-10-11 02:23:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:24,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993845617] [2021-10-11 02:23:24,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347563787] [2021-10-11 02:23:24,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d0d0c57-fe94-4aec-8134-f969990b55c2/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:24,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-11 02:23:24,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:23:24,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:23:24,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:24,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:24,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [753890391] [2021-10-11 02:23:24,841 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-11 02:23:24,841 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:23:24,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:23:24,842 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:23:24,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:23:25,187 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:23:25,476 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:25,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:23:25,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2021-10-11 02:23:25,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127027121] [2021-10-11 02:23:25,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 02:23:25,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:25,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 02:23:25,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:23:25,482 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2021-10-11 02:23:25,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:25,514 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-10-11 02:23:25,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:23:25,515 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2021-10-11 02:23:25,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:25,516 INFO L225 Difference]: With dead ends: 14 [2021-10-11 02:23:25,516 INFO L226 Difference]: Without dead ends: 11 [2021-10-11 02:23:25,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:23:25,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-11 02:23:25,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-11 02:23:25,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:23:25,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-11 02:23:25,526 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-10-11 02:23:25,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:25,527 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-11 02:23:25,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 02:23:25,527 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-11 02:23:25,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:23:25,528 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:25,528 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2021-10-11 02:23:25,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-11 02:23:25,757 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:25,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:25,757 INFO L82 PathProgramCache]: Analyzing trace with hash 241651110, now seen corresponding path program 3 times [2021-10-11 02:23:25,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:25,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204844891] [2021-10-11 02:23:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:23:25,774 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:23:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:23:25,789 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:23:25,806 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:23:25,806 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:23:25,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-11 02:23:25,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:23:25 BoogieIcfgContainer [2021-10-11 02:23:25,838 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:23:25,839 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:23:25,839 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:23:25,839 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:23:25,840 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:22" (3/4) ... [2021-10-11 02:23:25,841 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:23:25,895 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d0d0c57-fe94-4aec-8134-f969990b55c2/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:23:25,896 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:23:25,897 INFO L168 Benchmark]: Toolchain (without parser) took 4200.48 ms. Allocated memory was 88.1 MB in the beginning and 130.0 MB in the end (delta: 41.9 MB). Free memory was 52.7 MB in the beginning and 46.2 MB in the end (delta: 6.5 MB). Peak memory consumption was 48.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:25,898 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 88.1 MB. Free memory is still 68.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:25,901 INFO L168 Benchmark]: CACSL2BoogieTranslator took 359.15 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 52.5 MB in the beginning and 84.4 MB in the end (delta: -31.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:25,904 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.27 ms. Allocated memory is still 107.0 MB. Free memory was 84.4 MB in the beginning and 83.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:25,905 INFO L168 Benchmark]: Boogie Preprocessor took 40.17 ms. Allocated memory is still 107.0 MB. Free memory was 83.2 MB in the beginning and 82.3 MB in the end (delta: 894.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:25,905 INFO L168 Benchmark]: RCFGBuilder took 487.83 ms. Allocated memory is still 107.0 MB. Free memory was 82.3 MB in the beginning and 69.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:25,906 INFO L168 Benchmark]: TraceAbstraction took 3205.77 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 69.0 MB in the beginning and 48.3 MB in the end (delta: 20.7 MB). Peak memory consumption was 46.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:25,906 INFO L168 Benchmark]: Witness Printer took 57.21 ms. Allocated memory is still 130.0 MB. Free memory was 48.3 MB in the beginning and 46.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:25,914 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 88.1 MB. Free memory is still 68.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 359.15 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 52.5 MB in the beginning and 84.4 MB in the end (delta: -31.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.27 ms. Allocated memory is still 107.0 MB. Free memory was 84.4 MB in the beginning and 83.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.17 ms. Allocated memory is still 107.0 MB. Free memory was 83.2 MB in the beginning and 82.3 MB in the end (delta: 894.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 487.83 ms. Allocated memory is still 107.0 MB. Free memory was 82.3 MB in the beginning and 69.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3205.77 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 69.0 MB in the beginning and 48.3 MB in the end (delta: 20.7 MB). Peak memory consumption was 46.9 MB. Max. memory is 16.1 GB. * Witness Printer took 57.21 ms. Allocated memory is still 130.0 MB. Free memory was 48.3 MB in the beginning and 46.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 23]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int a = 6; [L19] a = 0 [L19] COND TRUE a < 6 [L19] ++a [L19] COND TRUE a < 6 [L19] ++a [L19] COND TRUE a < 6 [L19] ++a [L19] COND TRUE a < 6 [L19] ++a [L19] COND TRUE a < 6 [L19] ++a [L19] COND TRUE a < 6 [L19] ++a [L19] COND FALSE !(a < 6) [L22] COND TRUE a == 6 [L23] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.1s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 0 SDslu, 9 SDs, 0 SdLazy, 32 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 468 SizeOfPredicates, 0 NumberOfNonLiveVariables, 89 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...