./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_15-2.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_56d74dfb-f415-4f68-bd70-59c76feaaae4/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d74dfb-f415-4f68-bd70-59c76feaaae4/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_56d74dfb-f415-4f68-bd70-59c76feaaae4/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d74dfb-f415-4f68-bd70-59c76feaaae4/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_15-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d74dfb-f415-4f68-bd70-59c76feaaae4/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_56d74dfb-f415-4f68-bd70-59c76feaaae4/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 87d55100d8515cc1c8c9aa61ce99443e0eafb474 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:33:02,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:33:02,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:33:02,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:33:02,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:33:02,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:33:02,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:33:02,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:33:02,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:33:02,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:33:02,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:33:02,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:33:02,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:33:02,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:33:02,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:33:02,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:33:02,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:33:02,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:33:02,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:33:02,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:33:02,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:33:02,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:33:02,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:33:02,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:33:02,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:33:02,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:33:02,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:33:02,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:33:02,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:33:02,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:33:02,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:33:02,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:33:02,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:33:02,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:33:02,221 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:33:02,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:33:02,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:33:02,223 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:33:02,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:33:02,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:33:02,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:33:02,227 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d74dfb-f415-4f68-bd70-59c76feaaae4/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:33:02,249 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:33:02,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:33:02,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:33:02,251 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:33:02,252 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:33:02,252 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:33:02,252 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:33:02,253 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:33:02,253 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:33:02,253 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:33:02,254 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:33:02,254 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:33:02,255 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:33:02,255 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:33:02,255 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:33:02,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:33:02,257 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:33:02,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:33:02,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:33:02,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:33:02,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:33:02,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:33:02,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:33:02,259 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:33:02,260 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:33:02,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:33:02,260 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:33:02,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:33:02,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:33:02,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:33:02,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:33:02,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:33:02,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:33:02,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:33:02,262 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:33:02,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:33:02,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:33:02,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:33:02,263 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:33:02,263 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_56d74dfb-f415-4f68-bd70-59c76feaaae4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d74dfb-f415-4f68-bd70-59c76feaaae4/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87d55100d8515cc1c8c9aa61ce99443e0eafb474 [2021-10-11 02:33:02,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:33:02,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:33:02,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:33:02,622 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:33:02,623 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:33:02,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d74dfb-f415-4f68-bd70-59c76feaaae4/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/locks/test_locks_15-2.c [2021-10-11 02:33:02,698 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d74dfb-f415-4f68-bd70-59c76feaaae4/bin/utaipan-WLngWcDbfI/data/bbb128c02/1bb47bd740604e5183d87ec3b84e7818/FLAGda1e8ebde [2021-10-11 02:33:03,152 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:33:03,156 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d74dfb-f415-4f68-bd70-59c76feaaae4/sv-benchmarks/c/locks/test_locks_15-2.c [2021-10-11 02:33:03,172 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d74dfb-f415-4f68-bd70-59c76feaaae4/bin/utaipan-WLngWcDbfI/data/bbb128c02/1bb47bd740604e5183d87ec3b84e7818/FLAGda1e8ebde [2021-10-11 02:33:03,524 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d74dfb-f415-4f68-bd70-59c76feaaae4/bin/utaipan-WLngWcDbfI/data/bbb128c02/1bb47bd740604e5183d87ec3b84e7818 [2021-10-11 02:33:03,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:33:03,528 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:33:03,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:33:03,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:33:03,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:33:03,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:33:03" (1/1) ... [2021-10-11 02:33:03,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@791b8872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:03, skipping insertion in model container [2021-10-11 02:33:03,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:33:03" (1/1) ... [2021-10-11 02:33:03,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:33:03,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:33:03,775 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_56d74dfb-f415-4f68-bd70-59c76feaaae4/sv-benchmarks/c/locks/test_locks_15-2.c[5628,5641] [2021-10-11 02:33:03,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:33:03,791 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:33:03,821 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_56d74dfb-f415-4f68-bd70-59c76feaaae4/sv-benchmarks/c/locks/test_locks_15-2.c[5628,5641] [2021-10-11 02:33:03,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:33:03,835 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:33:03,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:03 WrapperNode [2021-10-11 02:33:03,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:33:03,837 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:33:03,837 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:33:03,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:33:03,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:03" (1/1) ... [2021-10-11 02:33:03,864 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:03" (1/1) ... [2021-10-11 02:33:03,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:33:03,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:33:03,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:33:03,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:33:03,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:03" (1/1) ... [2021-10-11 02:33:03,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:03" (1/1) ... [2021-10-11 02:33:03,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:03" (1/1) ... [2021-10-11 02:33:03,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:03" (1/1) ... [2021-10-11 02:33:03,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:03" (1/1) ... [2021-10-11 02:33:03,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:03" (1/1) ... [2021-10-11 02:33:03,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:03" (1/1) ... [2021-10-11 02:33:03,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:33:03,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:33:03,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:33:03,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:33:03,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:03" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d74dfb-f415-4f68-bd70-59c76feaaae4/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 02:33:04,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:33:04,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:33:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:33:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:33:05,144 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:33:05,144 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-11 02:33:05,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:05 BoogieIcfgContainer [2021-10-11 02:33:05,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:33:05,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:33:05,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:33:05,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:33:05,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:33:03" (1/3) ... [2021-10-11 02:33:05,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342542dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:33:05, skipping insertion in model container [2021-10-11 02:33:05,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:03" (2/3) ... [2021-10-11 02:33:05,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342542dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:33:05, skipping insertion in model container [2021-10-11 02:33:05,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:05" (3/3) ... [2021-10-11 02:33:05,159 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_15-2.c [2021-10-11 02:33:05,175 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:33:05,179 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:33:05,189 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:33:05,224 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:33:05,224 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:33:05,224 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:33:05,225 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:33:05,225 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:33:05,225 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:33:05,225 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:33:05,225 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:33:05,240 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2021-10-11 02:33:05,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:33:05,246 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:05,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:33:05,247 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:05,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:05,252 INFO L82 PathProgramCache]: Analyzing trace with hash 390611274, now seen corresponding path program 1 times [2021-10-11 02:33:05,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:05,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077930610] [2021-10-11 02:33:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:05,558 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 02:33:05,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077930610] [2021-10-11 02:33:05,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:05,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:05,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249307317] [2021-10-11 02:33:05,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:05,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:05,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:05,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:05,583 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2021-10-11 02:33:05,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:05,661 INFO L93 Difference]: Finished difference Result 78 states and 137 transitions. [2021-10-11 02:33:05,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:05,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-10-11 02:33:05,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:05,686 INFO L225 Difference]: With dead ends: 78 [2021-10-11 02:33:05,687 INFO L226 Difference]: Without dead ends: 67 [2021-10-11 02:33:05,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-11 02:33:05,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 35. [2021-10-11 02:33:05,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 02:33:05,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 63 transitions. [2021-10-11 02:33:05,739 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 63 transitions. Word has length 6 [2021-10-11 02:33:05,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:05,739 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 63 transitions. [2021-10-11 02:33:05,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:05,740 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 63 transitions. [2021-10-11 02:33:05,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:33:05,740 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:05,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:05,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:33:05,741 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:05,744 INFO L82 PathProgramCache]: Analyzing trace with hash -775740666, now seen corresponding path program 1 times [2021-10-11 02:33:05,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:05,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96441774] [2021-10-11 02:33:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:05,833 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 02:33:05,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96441774] [2021-10-11 02:33:05,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:05,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:05,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190731384] [2021-10-11 02:33:05,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:05,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:05,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:05,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:05,837 INFO L87 Difference]: Start difference. First operand 35 states and 63 transitions. Second operand 4 states. [2021-10-11 02:33:05,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:05,862 INFO L93 Difference]: Finished difference Result 67 states and 119 transitions. [2021-10-11 02:33:05,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:05,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:33:05,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:05,864 INFO L225 Difference]: With dead ends: 67 [2021-10-11 02:33:05,864 INFO L226 Difference]: Without dead ends: 65 [2021-10-11 02:33:05,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-11 02:33:05,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 35. [2021-10-11 02:33:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 02:33:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 62 transitions. [2021-10-11 02:33:05,871 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 62 transitions. Word has length 7 [2021-10-11 02:33:05,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:05,871 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 62 transitions. [2021-10-11 02:33:05,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:05,872 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 62 transitions. [2021-10-11 02:33:05,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:33:05,872 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:05,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:05,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:33:05,873 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:05,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:05,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1722055199, now seen corresponding path program 1 times [2021-10-11 02:33:05,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:05,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610389143] [2021-10-11 02:33:05,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:05,953 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 02:33:05,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610389143] [2021-10-11 02:33:05,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:05,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:05,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541246055] [2021-10-11 02:33:05,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:05,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:05,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:05,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:05,958 INFO L87 Difference]: Start difference. First operand 35 states and 62 transitions. Second operand 4 states. [2021-10-11 02:33:05,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:05,993 INFO L93 Difference]: Finished difference Result 65 states and 114 transitions. [2021-10-11 02:33:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:05,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-10-11 02:33:05,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:06,000 INFO L225 Difference]: With dead ends: 65 [2021-10-11 02:33:06,000 INFO L226 Difference]: Without dead ends: 63 [2021-10-11 02:33:06,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-11 02:33:06,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 35. [2021-10-11 02:33:06,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 02:33:06,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 61 transitions. [2021-10-11 02:33:06,012 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 61 transitions. Word has length 8 [2021-10-11 02:33:06,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:06,012 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 61 transitions. [2021-10-11 02:33:06,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:06,012 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 61 transitions. [2021-10-11 02:33:06,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:33:06,013 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:06,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:06,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:33:06,013 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:06,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:06,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1844316027, now seen corresponding path program 1 times [2021-10-11 02:33:06,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:06,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935224195] [2021-10-11 02:33:06,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:06,098 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 02:33:06,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935224195] [2021-10-11 02:33:06,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:06,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:06,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357693183] [2021-10-11 02:33:06,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:06,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:06,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:06,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,100 INFO L87 Difference]: Start difference. First operand 35 states and 61 transitions. Second operand 4 states. [2021-10-11 02:33:06,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:06,120 INFO L93 Difference]: Finished difference Result 63 states and 109 transitions. [2021-10-11 02:33:06,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:06,121 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-10-11 02:33:06,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:06,122 INFO L225 Difference]: With dead ends: 63 [2021-10-11 02:33:06,122 INFO L226 Difference]: Without dead ends: 61 [2021-10-11 02:33:06,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-11 02:33:06,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2021-10-11 02:33:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 02:33:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 60 transitions. [2021-10-11 02:33:06,128 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 60 transitions. Word has length 9 [2021-10-11 02:33:06,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:06,128 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 60 transitions. [2021-10-11 02:33:06,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:06,128 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 60 transitions. [2021-10-11 02:33:06,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:33:06,129 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:06,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:06,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:33:06,130 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:06,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:06,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1339434740, now seen corresponding path program 1 times [2021-10-11 02:33:06,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:06,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810487239] [2021-10-11 02:33:06,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:06,170 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 02:33:06,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810487239] [2021-10-11 02:33:06,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:06,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:06,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976848600] [2021-10-11 02:33:06,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:06,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:06,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:06,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,173 INFO L87 Difference]: Start difference. First operand 35 states and 60 transitions. Second operand 4 states. [2021-10-11 02:33:06,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:06,192 INFO L93 Difference]: Finished difference Result 61 states and 104 transitions. [2021-10-11 02:33:06,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:06,193 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2021-10-11 02:33:06,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:06,193 INFO L225 Difference]: With dead ends: 61 [2021-10-11 02:33:06,194 INFO L226 Difference]: Without dead ends: 59 [2021-10-11 02:33:06,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-11 02:33:06,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2021-10-11 02:33:06,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 02:33:06,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 59 transitions. [2021-10-11 02:33:06,198 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 59 transitions. Word has length 10 [2021-10-11 02:33:06,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:06,199 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 59 transitions. [2021-10-11 02:33:06,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:06,199 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 59 transitions. [2021-10-11 02:33:06,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:33:06,199 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:06,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:06,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:33:06,200 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:06,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:06,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1426982928, now seen corresponding path program 1 times [2021-10-11 02:33:06,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:06,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637773878] [2021-10-11 02:33:06,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:06,248 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 02:33:06,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637773878] [2021-10-11 02:33:06,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:06,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:06,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947700662] [2021-10-11 02:33:06,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:06,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:06,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:06,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,251 INFO L87 Difference]: Start difference. First operand 35 states and 59 transitions. Second operand 4 states. [2021-10-11 02:33:06,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:06,282 INFO L93 Difference]: Finished difference Result 59 states and 99 transitions. [2021-10-11 02:33:06,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:06,284 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 02:33:06,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:06,286 INFO L225 Difference]: With dead ends: 59 [2021-10-11 02:33:06,286 INFO L226 Difference]: Without dead ends: 57 [2021-10-11 02:33:06,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-11 02:33:06,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2021-10-11 02:33:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 02:33:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 58 transitions. [2021-10-11 02:33:06,292 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 58 transitions. Word has length 11 [2021-10-11 02:33:06,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:06,295 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 58 transitions. [2021-10-11 02:33:06,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:06,295 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 58 transitions. [2021-10-11 02:33:06,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:33:06,296 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:06,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:06,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:33:06,297 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:06,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:06,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1286584375, now seen corresponding path program 1 times [2021-10-11 02:33:06,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:06,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001757789] [2021-10-11 02:33:06,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:06,363 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 02:33:06,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001757789] [2021-10-11 02:33:06,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:06,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:06,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805169705] [2021-10-11 02:33:06,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:06,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:06,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:06,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,366 INFO L87 Difference]: Start difference. First operand 35 states and 58 transitions. Second operand 4 states. [2021-10-11 02:33:06,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:06,389 INFO L93 Difference]: Finished difference Result 57 states and 94 transitions. [2021-10-11 02:33:06,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:06,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-10-11 02:33:06,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:06,392 INFO L225 Difference]: With dead ends: 57 [2021-10-11 02:33:06,392 INFO L226 Difference]: Without dead ends: 55 [2021-10-11 02:33:06,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-11 02:33:06,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2021-10-11 02:33:06,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 02:33:06,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 57 transitions. [2021-10-11 02:33:06,400 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 57 transitions. Word has length 12 [2021-10-11 02:33:06,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:06,400 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 57 transitions. [2021-10-11 02:33:06,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:06,400 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 57 transitions. [2021-10-11 02:33:06,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:33:06,401 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:06,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:06,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:33:06,402 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:06,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:06,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1229196187, now seen corresponding path program 1 times [2021-10-11 02:33:06,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:06,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58455967] [2021-10-11 02:33:06,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:06,463 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 02:33:06,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58455967] [2021-10-11 02:33:06,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:06,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:06,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243451007] [2021-10-11 02:33:06,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:06,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:06,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:06,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,465 INFO L87 Difference]: Start difference. First operand 35 states and 57 transitions. Second operand 4 states. [2021-10-11 02:33:06,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:06,484 INFO L93 Difference]: Finished difference Result 55 states and 89 transitions. [2021-10-11 02:33:06,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:06,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-10-11 02:33:06,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:06,487 INFO L225 Difference]: With dead ends: 55 [2021-10-11 02:33:06,487 INFO L226 Difference]: Without dead ends: 53 [2021-10-11 02:33:06,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-11 02:33:06,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2021-10-11 02:33:06,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 02:33:06,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 56 transitions. [2021-10-11 02:33:06,500 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 56 transitions. Word has length 13 [2021-10-11 02:33:06,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:06,500 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 56 transitions. [2021-10-11 02:33:06,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:06,501 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 56 transitions. [2021-10-11 02:33:06,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 02:33:06,504 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:06,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:06,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:33:06,504 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:06,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:06,505 INFO L82 PathProgramCache]: Analyzing trace with hash 549837982, now seen corresponding path program 1 times [2021-10-11 02:33:06,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:06,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123999098] [2021-10-11 02:33:06,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:06,555 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 02:33:06,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123999098] [2021-10-11 02:33:06,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:06,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:06,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393045005] [2021-10-11 02:33:06,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:06,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:06,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:06,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,562 INFO L87 Difference]: Start difference. First operand 35 states and 56 transitions. Second operand 4 states. [2021-10-11 02:33:06,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:06,584 INFO L93 Difference]: Finished difference Result 53 states and 84 transitions. [2021-10-11 02:33:06,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:06,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2021-10-11 02:33:06,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:06,586 INFO L225 Difference]: With dead ends: 53 [2021-10-11 02:33:06,586 INFO L226 Difference]: Without dead ends: 51 [2021-10-11 02:33:06,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-11 02:33:06,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 35. [2021-10-11 02:33:06,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 02:33:06,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 55 transitions. [2021-10-11 02:33:06,601 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 55 transitions. Word has length 14 [2021-10-11 02:33:06,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:06,602 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 55 transitions. [2021-10-11 02:33:06,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:06,605 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 55 transitions. [2021-10-11 02:33:06,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-11 02:33:06,606 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:06,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:06,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-11 02:33:06,606 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:06,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:06,607 INFO L82 PathProgramCache]: Analyzing trace with hash -134677286, now seen corresponding path program 1 times [2021-10-11 02:33:06,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:06,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215061024] [2021-10-11 02:33:06,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:06,666 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 02:33:06,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215061024] [2021-10-11 02:33:06,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:06,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:06,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962341893] [2021-10-11 02:33:06,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:06,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:06,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:06,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,668 INFO L87 Difference]: Start difference. First operand 35 states and 55 transitions. Second operand 4 states. [2021-10-11 02:33:06,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:06,687 INFO L93 Difference]: Finished difference Result 51 states and 79 transitions. [2021-10-11 02:33:06,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:06,688 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2021-10-11 02:33:06,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:06,689 INFO L225 Difference]: With dead ends: 51 [2021-10-11 02:33:06,689 INFO L226 Difference]: Without dead ends: 49 [2021-10-11 02:33:06,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-11 02:33:06,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2021-10-11 02:33:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 02:33:06,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 54 transitions. [2021-10-11 02:33:06,693 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 54 transitions. Word has length 15 [2021-10-11 02:33:06,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:06,693 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 54 transitions. [2021-10-11 02:33:06,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:06,694 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 54 transitions. [2021-10-11 02:33:06,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 02:33:06,695 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:06,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:06,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-11 02:33:06,695 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:06,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:06,696 INFO L82 PathProgramCache]: Analyzing trace with hash 120186227, now seen corresponding path program 1 times [2021-10-11 02:33:06,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:06,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449305333] [2021-10-11 02:33:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:06,739 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 02:33:06,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449305333] [2021-10-11 02:33:06,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:06,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:06,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028989751] [2021-10-11 02:33:06,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:06,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:06,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:06,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,742 INFO L87 Difference]: Start difference. First operand 35 states and 54 transitions. Second operand 4 states. [2021-10-11 02:33:06,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:06,766 INFO L93 Difference]: Finished difference Result 49 states and 74 transitions. [2021-10-11 02:33:06,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:06,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2021-10-11 02:33:06,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:06,767 INFO L225 Difference]: With dead ends: 49 [2021-10-11 02:33:06,767 INFO L226 Difference]: Without dead ends: 47 [2021-10-11 02:33:06,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-11 02:33:06,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2021-10-11 02:33:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 02:33:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 53 transitions. [2021-10-11 02:33:06,780 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 53 transitions. Word has length 16 [2021-10-11 02:33:06,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:06,781 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 53 transitions. [2021-10-11 02:33:06,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:06,781 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 53 transitions. [2021-10-11 02:33:06,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 02:33:06,782 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:06,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:06,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-11 02:33:06,782 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:06,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:06,783 INFO L82 PathProgramCache]: Analyzing trace with hash -568979121, now seen corresponding path program 1 times [2021-10-11 02:33:06,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:06,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960055917] [2021-10-11 02:33:06,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:06,824 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 02:33:06,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960055917] [2021-10-11 02:33:06,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:06,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:06,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735196087] [2021-10-11 02:33:06,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:06,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:06,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:06,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,826 INFO L87 Difference]: Start difference. First operand 35 states and 53 transitions. Second operand 4 states. [2021-10-11 02:33:06,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:06,845 INFO L93 Difference]: Finished difference Result 47 states and 69 transitions. [2021-10-11 02:33:06,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:06,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-10-11 02:33:06,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:06,846 INFO L225 Difference]: With dead ends: 47 [2021-10-11 02:33:06,846 INFO L226 Difference]: Without dead ends: 45 [2021-10-11 02:33:06,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-11 02:33:06,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2021-10-11 02:33:06,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 02:33:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 52 transitions. [2021-10-11 02:33:06,848 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 52 transitions. Word has length 17 [2021-10-11 02:33:06,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:06,849 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 52 transitions. [2021-10-11 02:33:06,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:06,849 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 52 transitions. [2021-10-11 02:33:06,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:33:06,849 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:06,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:06,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-11 02:33:06,850 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:06,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:06,850 INFO L82 PathProgramCache]: Analyzing trace with hash -458268088, now seen corresponding path program 1 times [2021-10-11 02:33:06,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:06,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507974711] [2021-10-11 02:33:06,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:06,886 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 02:33:06,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507974711] [2021-10-11 02:33:06,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:06,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:06,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884372179] [2021-10-11 02:33:06,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:06,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:06,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:06,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,890 INFO L87 Difference]: Start difference. First operand 35 states and 52 transitions. Second operand 4 states. [2021-10-11 02:33:06,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:06,908 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2021-10-11 02:33:06,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:06,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-10-11 02:33:06,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:06,911 INFO L225 Difference]: With dead ends: 45 [2021-10-11 02:33:06,911 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 02:33:06,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 02:33:06,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2021-10-11 02:33:06,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 02:33:06,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 51 transitions. [2021-10-11 02:33:06,919 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 51 transitions. Word has length 18 [2021-10-11 02:33:06,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:06,920 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 51 transitions. [2021-10-11 02:33:06,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:06,920 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 51 transitions. [2021-10-11 02:33:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-11 02:33:06,921 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:06,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:06,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-11 02:33:06,921 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:06,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:06,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1321193020, now seen corresponding path program 1 times [2021-10-11 02:33:06,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:06,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876746646] [2021-10-11 02:33:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:06,976 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 02:33:06,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876746646] [2021-10-11 02:33:06,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:06,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:06,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986325731] [2021-10-11 02:33:06,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:06,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:06,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:06,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:06,979 INFO L87 Difference]: Start difference. First operand 35 states and 51 transitions. Second operand 4 states. [2021-10-11 02:33:06,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:06,996 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2021-10-11 02:33:06,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:06,997 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-10-11 02:33:06,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:06,997 INFO L225 Difference]: With dead ends: 43 [2021-10-11 02:33:06,998 INFO L226 Difference]: Without dead ends: 41 [2021-10-11 02:33:06,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-11 02:33:07,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2021-10-11 02:33:07,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 02:33:07,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 50 transitions. [2021-10-11 02:33:07,003 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 50 transitions. Word has length 19 [2021-10-11 02:33:07,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:07,003 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 50 transitions. [2021-10-11 02:33:07,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:07,003 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 50 transitions. [2021-10-11 02:33:07,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-11 02:33:07,005 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:07,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:07,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-11 02:33:07,005 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:07,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:07,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1992905501, now seen corresponding path program 1 times [2021-10-11 02:33:07,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:07,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634934916] [2021-10-11 02:33:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:07,046 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 02:33:07,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634934916] [2021-10-11 02:33:07,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:07,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:07,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383962504] [2021-10-11 02:33:07,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:07,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:07,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:07,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:07,055 INFO L87 Difference]: Start difference. First operand 35 states and 50 transitions. Second operand 4 states. [2021-10-11 02:33:07,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:07,071 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2021-10-11 02:33:07,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:07,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-10-11 02:33:07,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:07,072 INFO L225 Difference]: With dead ends: 37 [2021-10-11 02:33:07,072 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:33:07,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:07,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:33:07,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:33:07,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:33:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:33:07,076 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-10-11 02:33:07,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:07,076 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:33:07,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:07,077 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:33:07,077 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:33:07,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-11 02:33:07,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:33:07,092 INFO L265 CegarLoopResult]: At program point L234(lines 6 235) the Hoare annotation is: true [2021-10-11 02:33:07,093 INFO L262 CegarLoopResult]: For program point L201(line 201) no Hoare annotation was computed. [2021-10-11 02:33:07,093 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:33:07,093 INFO L262 CegarLoopResult]: For program point L185-1(lines 56 230) no Hoare annotation was computed. [2021-10-11 02:33:07,093 INFO L262 CegarLoopResult]: For program point L186(line 186) no Hoare annotation was computed. [2021-10-11 02:33:07,093 INFO L262 CegarLoopResult]: For program point L170-1(lines 56 230) no Hoare annotation was computed. [2021-10-11 02:33:07,093 INFO L262 CegarLoopResult]: For program point L220-1(lines 56 230) no Hoare annotation was computed. [2021-10-11 02:33:07,093 INFO L262 CegarLoopResult]: For program point L171(line 171) no Hoare annotation was computed. [2021-10-11 02:33:07,094 INFO L262 CegarLoopResult]: For program point L221(line 221) no Hoare annotation was computed. [2021-10-11 02:33:07,094 INFO L262 CegarLoopResult]: For program point L155-1(lines 56 230) no Hoare annotation was computed. [2021-10-11 02:33:07,094 INFO L262 CegarLoopResult]: For program point L205-1(lines 56 230) no Hoare annotation was computed. [2021-10-11 02:33:07,094 INFO L262 CegarLoopResult]: For program point L156(line 156) no Hoare annotation was computed. [2021-10-11 02:33:07,095 INFO L262 CegarLoopResult]: For program point L206(line 206) no Hoare annotation was computed. [2021-10-11 02:33:07,095 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:33:07,095 INFO L262 CegarLoopResult]: For program point L190-1(lines 56 230) no Hoare annotation was computed. [2021-10-11 02:33:07,096 INFO L262 CegarLoopResult]: For program point L58(lines 58 60) no Hoare annotation was computed. [2021-10-11 02:33:07,096 INFO L262 CegarLoopResult]: For program point L191(line 191) no Hoare annotation was computed. [2021-10-11 02:33:07,096 INFO L262 CegarLoopResult]: For program point L175-1(lines 56 230) no Hoare annotation was computed. [2021-10-11 02:33:07,096 INFO L265 CegarLoopResult]: At program point L225-1(lines 56 230) the Hoare annotation is: true [2021-10-11 02:33:07,096 INFO L262 CegarLoopResult]: For program point L176(line 176) no Hoare annotation was computed. [2021-10-11 02:33:07,096 INFO L262 CegarLoopResult]: For program point L226(line 226) no Hoare annotation was computed. [2021-10-11 02:33:07,097 INFO L258 CegarLoopResult]: At program point L226-1(lines 7 235) the Hoare annotation is: false [2021-10-11 02:33:07,097 INFO L262 CegarLoopResult]: For program point L160-1(lines 56 230) no Hoare annotation was computed. [2021-10-11 02:33:07,097 INFO L262 CegarLoopResult]: For program point L210-1(lines 56 230) no Hoare annotation was computed. [2021-10-11 02:33:07,097 INFO L262 CegarLoopResult]: For program point L161(line 161) no Hoare annotation was computed. [2021-10-11 02:33:07,097 INFO L262 CegarLoopResult]: For program point L211(line 211) no Hoare annotation was computed. [2021-10-11 02:33:07,097 INFO L262 CegarLoopResult]: For program point L195-1(lines 56 230) no Hoare annotation was computed. [2021-10-11 02:33:07,097 INFO L262 CegarLoopResult]: For program point L196(line 196) no Hoare annotation was computed. [2021-10-11 02:33:07,098 INFO L262 CegarLoopResult]: For program point L180-1(lines 56 230) no Hoare annotation was computed. [2021-10-11 02:33:07,098 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 233) no Hoare annotation was computed. [2021-10-11 02:33:07,098 INFO L262 CegarLoopResult]: For program point L181(line 181) no Hoare annotation was computed. [2021-10-11 02:33:07,098 INFO L265 CegarLoopResult]: At program point L231(lines 7 235) the Hoare annotation is: true [2021-10-11 02:33:07,098 INFO L262 CegarLoopResult]: For program point L165-1(lines 56 230) no Hoare annotation was computed. [2021-10-11 02:33:07,098 INFO L262 CegarLoopResult]: For program point L215-1(lines 56 230) no Hoare annotation was computed. [2021-10-11 02:33:07,099 INFO L262 CegarLoopResult]: For program point L149-1(lines 56 230) no Hoare annotation was computed. [2021-10-11 02:33:07,099 INFO L262 CegarLoopResult]: For program point L166(line 166) no Hoare annotation was computed. [2021-10-11 02:33:07,099 INFO L262 CegarLoopResult]: For program point L216(line 216) no Hoare annotation was computed. [2021-10-11 02:33:07,099 INFO L262 CegarLoopResult]: For program point L200-1(lines 56 230) no Hoare annotation was computed. [2021-10-11 02:33:07,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:33:07 BoogieIcfgContainer [2021-10-11 02:33:07,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:33:07,112 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:33:07,112 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:33:07,113 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:33:07,113 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:05" (3/4) ... [2021-10-11 02:33:07,117 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:33:07,135 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-10-11 02:33:07,136 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-11 02:33:07,137 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:33:07,137 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:33:07,225 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d74dfb-f415-4f68-bd70-59c76feaaae4/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:33:07,225 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:33:07,227 INFO L168 Benchmark]: Toolchain (without parser) took 3698.51 ms. Allocated memory was 88.1 MB in the beginning and 138.4 MB in the end (delta: 50.3 MB). Free memory was 53.7 MB in the beginning and 102.4 MB in the end (delta: -48.7 MB). Peak memory consumption was 1.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:07,228 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 88.1 MB. Free memory was 59.1 MB in the beginning and 59.1 MB in the end (delta: 25.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:07,229 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.67 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 53.4 MB in the beginning and 90.3 MB in the end (delta: -36.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:07,229 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.37 ms. Allocated memory is still 115.3 MB. Free memory was 90.3 MB in the beginning and 88.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:07,229 INFO L168 Benchmark]: Boogie Preprocessor took 39.69 ms. Allocated memory is still 115.3 MB. Free memory was 88.2 MB in the beginning and 87.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:07,230 INFO L168 Benchmark]: RCFGBuilder took 1218.95 ms. Allocated memory is still 115.3 MB. Free memory was 87.0 MB in the beginning and 83.1 MB in the end (delta: 3.9 MB). Peak memory consumption was 52.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:07,230 INFO L168 Benchmark]: TraceAbstraction took 1960.86 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 83.1 MB in the beginning and 107.7 MB in the end (delta: -24.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:07,230 INFO L168 Benchmark]: Witness Printer took 113.18 ms. Allocated memory is still 138.4 MB. Free memory was 106.6 MB in the beginning and 102.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:07,235 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 88.1 MB. Free memory was 59.1 MB in the beginning and 59.1 MB in the end (delta: 25.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 296.67 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 53.4 MB in the beginning and 90.3 MB in the end (delta: -36.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.37 ms. Allocated memory is still 115.3 MB. Free memory was 90.3 MB in the beginning and 88.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.69 ms. Allocated memory is still 115.3 MB. Free memory was 88.2 MB in the beginning and 87.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1218.95 ms. Allocated memory is still 115.3 MB. Free memory was 87.0 MB in the beginning and 83.1 MB in the end (delta: 3.9 MB). Peak memory consumption was 52.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1960.86 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 83.1 MB in the beginning and 107.7 MB in the end (delta: -24.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 113.18 ms. Allocated memory is still 138.4 MB. Free memory was 106.6 MB in the beginning and 102.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 233]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 815 SDtfs, 692 SDslu, 1219 SDs, 0 SdLazy, 135 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 266 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 9 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 195 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 13120 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 15 PerfectInterpolantSequences, 0/0 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 correct! Received shutdown request...