./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_10.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-vcloud-master/worker/run_dir_14aa74fd-a728-47e9-8df2-b19d8a11269c/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_14aa74fd-a728-47e9-8df2-b19d8a11269c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_14aa74fd-a728-47e9-8df2-b19d8a11269c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_14aa74fd-a728-47e9-8df2-b19d8a11269c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_10.c -s /tmp/vcloud-vcloud-master/worker/run_dir_14aa74fd-a728-47e9-8df2-b19d8a11269c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_14aa74fd-a728-47e9-8df2-b19d8a11269c/bin/utaipan --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 6423b7e5fbcc52c08e52aff49c79db620dd407c4 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 05:56:46,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 05:56:46,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 05:56:46,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 05:56:46,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 05:56:46,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 05:56:46,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 05:56:46,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 05:56:46,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 05:56:46,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 05:56:46,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 05:56:46,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 05:56:46,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 05:56:46,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 05:56:46,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 05:56:46,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 05:56:46,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 05:56:46,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 05:56:46,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 05:56:46,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 05:56:46,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 05:56:46,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 05:56:46,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 05:56:46,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 05:56:46,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 05:56:46,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 05:56:46,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 05:56:46,177 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 05:56:46,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 05:56:46,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 05:56:46,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 05:56:46,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 05:56:46,180 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 05:56:46,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 05:56:46,182 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 05:56:46,182 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 05:56:46,183 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 05:56:46,183 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 05:56:46,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 05:56:46,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 05:56:46,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 05:56:46,185 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_14aa74fd-a728-47e9-8df2-b19d8a11269c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 05:56:46,207 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 05:56:46,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 05:56:46,208 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 05:56:46,208 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 05:56:46,208 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 05:56:46,208 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 05:56:46,208 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 05:56:46,208 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 05:56:46,208 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 05:56:46,208 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 05:56:46,209 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 05:56:46,209 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 05:56:46,209 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 05:56:46,209 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 05:56:46,209 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 05:56:46,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 05:56:46,210 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 05:56:46,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 05:56:46,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 05:56:46,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 05:56:46,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 05:56:46,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 05:56:46,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 05:56:46,211 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 05:56:46,211 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 05:56:46,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 05:56:46,211 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 05:56:46,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 05:56:46,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 05:56:46,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 05:56:46,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:56:46,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 05:56:46,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 05:56:46,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 05:56:46,212 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 05:56:46,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 05:56:46,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 05:56:46,213 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 05:56:46,213 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 05:56:46,213 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-vcloud-master/worker/run_dir_14aa74fd-a728-47e9-8df2-b19d8a11269c/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_14aa74fd-a728-47e9-8df2-b19d8a11269c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6423b7e5fbcc52c08e52aff49c79db620dd407c4 [2020-12-09 05:56:46,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 05:56:46,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 05:56:46,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 05:56:46,413 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 05:56:46,414 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 05:56:46,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_14aa74fd-a728-47e9-8df2-b19d8a11269c/bin/utaipan/../../sv-benchmarks/c/locks/test_locks_10.c [2020-12-09 05:56:46,456 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_14aa74fd-a728-47e9-8df2-b19d8a11269c/bin/utaipan/data/ce31c32e1/0a87c35e48a24f75b3b1cb566f2d7dde/FLAG3edaa293f [2020-12-09 05:56:46,820 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 05:56:46,821 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_14aa74fd-a728-47e9-8df2-b19d8a11269c/sv-benchmarks/c/locks/test_locks_10.c [2020-12-09 05:56:46,826 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_14aa74fd-a728-47e9-8df2-b19d8a11269c/bin/utaipan/data/ce31c32e1/0a87c35e48a24f75b3b1cb566f2d7dde/FLAG3edaa293f [2020-12-09 05:56:46,838 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_14aa74fd-a728-47e9-8df2-b19d8a11269c/bin/utaipan/data/ce31c32e1/0a87c35e48a24f75b3b1cb566f2d7dde [2020-12-09 05:56:46,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 05:56:46,842 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 05:56:46,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 05:56:46,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 05:56:46,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 05:56:46,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:56:46" (1/1) ... [2020-12-09 05:56:46,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77e4a7f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:56:46, skipping insertion in model container [2020-12-09 05:56:46,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:56:46" (1/1) ... [2020-12-09 05:56:46,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 05:56:46,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 05:56:46,989 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_14aa74fd-a728-47e9-8df2-b19d8a11269c/sv-benchmarks/c/locks/test_locks_10.c[3901,3914] [2020-12-09 05:56:46,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:56:47,002 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 05:56:47,026 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_14aa74fd-a728-47e9-8df2-b19d8a11269c/sv-benchmarks/c/locks/test_locks_10.c[3901,3914] [2020-12-09 05:56:47,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:56:47,040 INFO L208 MainTranslator]: Completed translation [2020-12-09 05:56:47,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:56:47 WrapperNode [2020-12-09 05:56:47,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 05:56:47,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 05:56:47,042 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 05:56:47,042 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 05:56:47,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:56:47" (1/1) ... [2020-12-09 05:56:47,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:56:47" (1/1) ... [2020-12-09 05:56:47,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 05:56:47,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 05:56:47,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 05:56:47,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 05:56:47,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:56:47" (1/1) ... [2020-12-09 05:56:47,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:56:47" (1/1) ... [2020-12-09 05:56:47,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:56:47" (1/1) ... [2020-12-09 05:56:47,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:56:47" (1/1) ... [2020-12-09 05:56:47,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:56:47" (1/1) ... [2020-12-09 05:56:47,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:56:47" (1/1) ... [2020-12-09 05:56:47,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:56:47" (1/1) ... [2020-12-09 05:56:47,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 05:56:47,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 05:56:47,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 05:56:47,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 05:56:47,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:56:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_14aa74fd-a728-47e9-8df2-b19d8a11269c/bin/utaipan/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 [2020-12-09 05:56:47,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 05:56:47,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 05:56:47,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 05:56:47,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 05:56:47,546 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 05:56:47,546 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-09 05:56:47,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:56:47 BoogieIcfgContainer [2020-12-09 05:56:47,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 05:56:47,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 05:56:47,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 05:56:47,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 05:56:47,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:56:46" (1/3) ... [2020-12-09 05:56:47,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b0b67f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:56:47, skipping insertion in model container [2020-12-09 05:56:47,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:56:47" (2/3) ... [2020-12-09 05:56:47,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b0b67f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:56:47, skipping insertion in model container [2020-12-09 05:56:47,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:56:47" (3/3) ... [2020-12-09 05:56:47,556 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-12-09 05:56:47,566 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 05:56:47,569 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 05:56:47,577 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 05:56:47,605 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 05:56:47,606 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 05:56:47,606 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 05:56:47,606 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 05:56:47,606 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 05:56:47,606 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 05:56:47,607 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 05:56:47,607 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 05:56:47,626 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-12-09 05:56:47,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 05:56:47,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:56:47,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 05:56:47,630 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:56:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:56:47,634 INFO L82 PathProgramCache]: Analyzing trace with hash -2045726551, now seen corresponding path program 1 times [2020-12-09 05:56:47,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:56:47,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067015114] [2020-12-09 05:56:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:56:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:56:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:56:47,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067015114] [2020-12-09 05:56:47,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:56:47,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 05:56:47,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476878815] [2020-12-09 05:56:47,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:56:47,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:56:47,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:56:47,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:56:47,813 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2020-12-09 05:56:47,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:56:47,851 INFO L93 Difference]: Finished difference Result 58 states and 97 transitions. [2020-12-09 05:56:47,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:56:47,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 05:56:47,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:56:47,859 INFO L225 Difference]: With dead ends: 58 [2020-12-09 05:56:47,859 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 05:56:47,861 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 [2020-12-09 05:56:47,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 05:56:47,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 25. [2020-12-09 05:56:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 05:56:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 43 transitions. [2020-12-09 05:56:47,886 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 43 transitions. Word has length 6 [2020-12-09 05:56:47,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:56:47,887 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 43 transitions. [2020-12-09 05:56:47,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:56:47,887 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 43 transitions. [2020-12-09 05:56:47,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 05:56:47,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:56:47,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:56:47,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 05:56:47,887 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:56:47,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:56:47,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1007199707, now seen corresponding path program 1 times [2020-12-09 05:56:47,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:56:47,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332413021] [2020-12-09 05:56:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:56:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:56:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:56:47,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332413021] [2020-12-09 05:56:47,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:56:47,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 05:56:47,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905897559] [2020-12-09 05:56:47,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:56:47,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:56:47,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:56:47,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:56:47,935 INFO L87 Difference]: Start difference. First operand 25 states and 43 transitions. Second operand 4 states. [2020-12-09 05:56:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:56:47,951 INFO L93 Difference]: Finished difference Result 47 states and 79 transitions. [2020-12-09 05:56:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:56:47,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 05:56:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:56:47,952 INFO L225 Difference]: With dead ends: 47 [2020-12-09 05:56:47,952 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 05:56:47,953 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 [2020-12-09 05:56:47,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 05:56:47,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 25. [2020-12-09 05:56:47,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 05:56:47,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 42 transitions. [2020-12-09 05:56:47,956 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 42 transitions. Word has length 7 [2020-12-09 05:56:47,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:56:47,956 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 42 transitions. [2020-12-09 05:56:47,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:56:47,956 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 42 transitions. [2020-12-09 05:56:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 05:56:47,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:56:47,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:56:47,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 05:56:47,957 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:56:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:56:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1158633534, now seen corresponding path program 1 times [2020-12-09 05:56:47,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:56:47,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427669011] [2020-12-09 05:56:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:56:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:56:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:56:47,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427669011] [2020-12-09 05:56:47,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:56:47,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 05:56:47,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232617920] [2020-12-09 05:56:47,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:56:47,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:56:47,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:56:47,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:56:47,991 INFO L87 Difference]: Start difference. First operand 25 states and 42 transitions. Second operand 4 states. [2020-12-09 05:56:48,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:56:48,006 INFO L93 Difference]: Finished difference Result 45 states and 74 transitions. [2020-12-09 05:56:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:56:48,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 05:56:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:56:48,007 INFO L225 Difference]: With dead ends: 45 [2020-12-09 05:56:48,007 INFO L226 Difference]: Without dead ends: 43 [2020-12-09 05:56:48,007 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 [2020-12-09 05:56:48,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-09 05:56:48,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 25. [2020-12-09 05:56:48,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 05:56:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 41 transitions. [2020-12-09 05:56:48,011 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 41 transitions. Word has length 8 [2020-12-09 05:56:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:56:48,011 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 41 transitions. [2020-12-09 05:56:48,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:56:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 41 transitions. [2020-12-09 05:56:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 05:56:48,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:56:48,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:56:48,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 05:56:48,012 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:56:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:56:48,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1558115216, now seen corresponding path program 1 times [2020-12-09 05:56:48,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:56:48,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322248566] [2020-12-09 05:56:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:56:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:56:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:56:48,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322248566] [2020-12-09 05:56:48,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:56:48,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 05:56:48,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260270869] [2020-12-09 05:56:48,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:56:48,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:56:48,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:56:48,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:56:48,047 INFO L87 Difference]: Start difference. First operand 25 states and 41 transitions. Second operand 4 states. [2020-12-09 05:56:48,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:56:48,062 INFO L93 Difference]: Finished difference Result 43 states and 69 transitions. [2020-12-09 05:56:48,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:56:48,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 05:56:48,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:56:48,063 INFO L225 Difference]: With dead ends: 43 [2020-12-09 05:56:48,064 INFO L226 Difference]: Without dead ends: 41 [2020-12-09 05:56:48,064 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 [2020-12-09 05:56:48,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-09 05:56:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 25. [2020-12-09 05:56:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 05:56:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 40 transitions. [2020-12-09 05:56:48,068 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 40 transitions. Word has length 9 [2020-12-09 05:56:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:56:48,068 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 40 transitions. [2020-12-09 05:56:48,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:56:48,069 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 40 transitions. [2020-12-09 05:56:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 05:56:48,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:56:48,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:56:48,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 05:56:48,070 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:56:48,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:56:48,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1057145811, now seen corresponding path program 1 times [2020-12-09 05:56:48,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:56:48,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507091236] [2020-12-09 05:56:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:56:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:56:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:56:48,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507091236] [2020-12-09 05:56:48,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:56:48,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 05:56:48,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379690472] [2020-12-09 05:56:48,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:56:48,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:56:48,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:56:48,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:56:48,107 INFO L87 Difference]: Start difference. First operand 25 states and 40 transitions. Second operand 4 states. [2020-12-09 05:56:48,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:56:48,126 INFO L93 Difference]: Finished difference Result 41 states and 64 transitions. [2020-12-09 05:56:48,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:56:48,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 05:56:48,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:56:48,127 INFO L225 Difference]: With dead ends: 41 [2020-12-09 05:56:48,127 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 05:56:48,128 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 [2020-12-09 05:56:48,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 05:56:48,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 25. [2020-12-09 05:56:48,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 05:56:48,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 39 transitions. [2020-12-09 05:56:48,131 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 39 transitions. Word has length 10 [2020-12-09 05:56:48,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:56:48,132 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 39 transitions. [2020-12-09 05:56:48,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:56:48,132 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 39 transitions. [2020-12-09 05:56:48,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 05:56:48,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:56:48,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:56:48,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 05:56:48,133 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:56:48,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:56:48,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1588003515, now seen corresponding path program 1 times [2020-12-09 05:56:48,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:56:48,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363917647] [2020-12-09 05:56:48,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:56:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:56:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:56:48,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363917647] [2020-12-09 05:56:48,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:56:48,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 05:56:48,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977733716] [2020-12-09 05:56:48,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:56:48,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:56:48,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:56:48,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:56:48,169 INFO L87 Difference]: Start difference. First operand 25 states and 39 transitions. Second operand 4 states. [2020-12-09 05:56:48,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:56:48,183 INFO L93 Difference]: Finished difference Result 39 states and 59 transitions. [2020-12-09 05:56:48,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:56:48,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 05:56:48,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:56:48,184 INFO L225 Difference]: With dead ends: 39 [2020-12-09 05:56:48,184 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 05:56:48,184 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 [2020-12-09 05:56:48,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 05:56:48,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2020-12-09 05:56:48,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 05:56:48,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 38 transitions. [2020-12-09 05:56:48,186 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 38 transitions. Word has length 11 [2020-12-09 05:56:48,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:56:48,187 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 38 transitions. [2020-12-09 05:56:48,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:56:48,187 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 38 transitions. [2020-12-09 05:56:48,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 05:56:48,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:56:48,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:56:48,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 05:56:48,187 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:56:48,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:56:48,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1983253656, now seen corresponding path program 1 times [2020-12-09 05:56:48,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:56:48,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332280113] [2020-12-09 05:56:48,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:56:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:56:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:56:48,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332280113] [2020-12-09 05:56:48,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:56:48,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 05:56:48,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98780088] [2020-12-09 05:56:48,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:56:48,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:56:48,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:56:48,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:56:48,211 INFO L87 Difference]: Start difference. First operand 25 states and 38 transitions. Second operand 4 states. [2020-12-09 05:56:48,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:56:48,223 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-12-09 05:56:48,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:56:48,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-09 05:56:48,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:56:48,224 INFO L225 Difference]: With dead ends: 37 [2020-12-09 05:56:48,224 INFO L226 Difference]: Without dead ends: 35 [2020-12-09 05:56:48,224 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 [2020-12-09 05:56:48,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-09 05:56:48,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2020-12-09 05:56:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 05:56:48,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 37 transitions. [2020-12-09 05:56:48,226 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 37 transitions. Word has length 12 [2020-12-09 05:56:48,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:56:48,227 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 37 transitions. [2020-12-09 05:56:48,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:56:48,227 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 37 transitions. [2020-12-09 05:56:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 05:56:48,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:56:48,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:56:48,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 05:56:48,227 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:56:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:56:48,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1351105798, now seen corresponding path program 1 times [2020-12-09 05:56:48,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:56:48,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422189058] [2020-12-09 05:56:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:56:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:56:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:56:48,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422189058] [2020-12-09 05:56:48,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:56:48,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 05:56:48,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314240201] [2020-12-09 05:56:48,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:56:48,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:56:48,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:56:48,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:56:48,253 INFO L87 Difference]: Start difference. First operand 25 states and 37 transitions. Second operand 4 states. [2020-12-09 05:56:48,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:56:48,265 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2020-12-09 05:56:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:56:48,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-09 05:56:48,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:56:48,266 INFO L225 Difference]: With dead ends: 35 [2020-12-09 05:56:48,266 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 05:56:48,266 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 [2020-12-09 05:56:48,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 05:56:48,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-12-09 05:56:48,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 05:56:48,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 36 transitions. [2020-12-09 05:56:48,268 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 36 transitions. Word has length 13 [2020-12-09 05:56:48,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:56:48,268 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 36 transitions. [2020-12-09 05:56:48,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:56:48,268 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2020-12-09 05:56:48,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 05:56:48,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:56:48,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:56:48,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 05:56:48,269 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:56:48,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:56:48,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1065608957, now seen corresponding path program 1 times [2020-12-09 05:56:48,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:56:48,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024712939] [2020-12-09 05:56:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:56:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:56:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:56:48,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024712939] [2020-12-09 05:56:48,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:56:48,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 05:56:48,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561905057] [2020-12-09 05:56:48,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:56:48,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:56:48,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:56:48,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:56:48,301 INFO L87 Difference]: Start difference. First operand 25 states and 36 transitions. Second operand 4 states. [2020-12-09 05:56:48,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:56:48,315 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2020-12-09 05:56:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:56:48,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-09 05:56:48,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:56:48,316 INFO L225 Difference]: With dead ends: 33 [2020-12-09 05:56:48,316 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 05:56:48,316 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 [2020-12-09 05:56:48,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 05:56:48,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-12-09 05:56:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 05:56:48,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2020-12-09 05:56:48,319 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 14 [2020-12-09 05:56:48,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:56:48,319 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2020-12-09 05:56:48,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:56:48,319 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2020-12-09 05:56:48,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 05:56:48,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:56:48,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:56:48,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 05:56:48,320 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:56:48,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:56:48,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1325644625, now seen corresponding path program 1 times [2020-12-09 05:56:48,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:56:48,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351388436] [2020-12-09 05:56:48,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:56:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:56:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:56:48,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351388436] [2020-12-09 05:56:48,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:56:48,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 05:56:48,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620830401] [2020-12-09 05:56:48,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:56:48,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:56:48,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:56:48,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:56:48,351 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand 4 states. [2020-12-09 05:56:48,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:56:48,363 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2020-12-09 05:56:48,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:56:48,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-09 05:56:48,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:56:48,364 INFO L225 Difference]: With dead ends: 27 [2020-12-09 05:56:48,364 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 05:56:48,365 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 [2020-12-09 05:56:48,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 05:56:48,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 05:56:48,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 05:56:48,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 05:56:48,365 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-12-09 05:56:48,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:56:48,365 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 05:56:48,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:56:48,366 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 05:56:48,366 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 05:56:48,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 05:56:48,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 05:56:48,378 INFO L262 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-12-09 05:56:48,378 INFO L262 CegarLoopResult]: For program point L151(line 151) no Hoare annotation was computed. [2020-12-09 05:56:48,378 INFO L262 CegarLoopResult]: For program point L110-1(lines 41 160) no Hoare annotation was computed. [2020-12-09 05:56:48,378 INFO L262 CegarLoopResult]: For program point L135-1(lines 41 160) no Hoare annotation was computed. [2020-12-09 05:56:48,378 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 05:56:48,378 INFO L262 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-12-09 05:56:48,378 INFO L262 CegarLoopResult]: For program point L136(line 136) no Hoare annotation was computed. [2020-12-09 05:56:48,379 INFO L265 CegarLoopResult]: At program point L161(lines 7 165) the Hoare annotation is: true [2020-12-09 05:56:48,379 INFO L262 CegarLoopResult]: For program point L120-1(lines 41 160) no Hoare annotation was computed. [2020-12-09 05:56:48,379 INFO L262 CegarLoopResult]: For program point L145-1(lines 41 160) no Hoare annotation was computed. [2020-12-09 05:56:48,379 INFO L262 CegarLoopResult]: For program point L104-1(lines 41 160) no Hoare annotation was computed. [2020-12-09 05:56:48,379 INFO L262 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-12-09 05:56:48,379 INFO L262 CegarLoopResult]: For program point L146(line 146) no Hoare annotation was computed. [2020-12-09 05:56:48,379 INFO L262 CegarLoopResult]: For program point L130-1(lines 41 160) no Hoare annotation was computed. [2020-12-09 05:56:48,379 INFO L265 CegarLoopResult]: At program point L155-1(lines 41 160) the Hoare annotation is: true [2020-12-09 05:56:48,379 INFO L265 CegarLoopResult]: At program point L164(lines 6 165) the Hoare annotation is: true [2020-12-09 05:56:48,379 INFO L262 CegarLoopResult]: For program point L131(line 131) no Hoare annotation was computed. [2020-12-09 05:56:48,379 INFO L262 CegarLoopResult]: For program point L156(line 156) no Hoare annotation was computed. [2020-12-09 05:56:48,379 INFO L258 CegarLoopResult]: At program point L156-1(lines 7 165) the Hoare annotation is: false [2020-12-09 05:56:48,380 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 163) no Hoare annotation was computed. [2020-12-09 05:56:48,380 INFO L262 CegarLoopResult]: For program point L115-1(lines 41 160) no Hoare annotation was computed. [2020-12-09 05:56:48,380 INFO L262 CegarLoopResult]: For program point L140-1(lines 41 160) no Hoare annotation was computed. [2020-12-09 05:56:48,380 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 05:56:48,380 INFO L262 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-12-09 05:56:48,380 INFO L262 CegarLoopResult]: For program point L141(line 141) no Hoare annotation was computed. [2020-12-09 05:56:48,380 INFO L262 CegarLoopResult]: For program point L125-1(lines 41 160) no Hoare annotation was computed. [2020-12-09 05:56:48,380 INFO L262 CegarLoopResult]: For program point L150-1(lines 41 160) no Hoare annotation was computed. [2020-12-09 05:56:48,380 INFO L262 CegarLoopResult]: For program point L43(lines 43 45) no Hoare annotation was computed. [2020-12-09 05:56:48,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:56:48 BoogieIcfgContainer [2020-12-09 05:56:48,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 05:56:48,389 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 05:56:48,389 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 05:56:48,389 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 05:56:48,390 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:56:47" (3/4) ... [2020-12-09 05:56:48,392 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 05:56:48,402 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-12-09 05:56:48,403 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-09 05:56:48,403 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 05:56:48,403 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 05:56:48,452 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_14aa74fd-a728-47e9-8df2-b19d8a11269c/bin/utaipan/witness.graphml [2020-12-09 05:56:48,452 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 05:56:48,458 INFO L168 Benchmark]: Toolchain (without parser) took 1615.47 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 60.5 MB in the beginning and 84.7 MB in the end (delta: -24.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 16.1 GB. [2020-12-09 05:56:48,458 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 88.1 MB. Free memory is still 47.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:56:48,459 INFO L168 Benchmark]: CACSL2BoogieTranslator took 198.30 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 60.1 MB in the beginning and 84.2 MB in the end (delta: -24.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 05:56:48,459 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.62 ms. Allocated memory is still 107.0 MB. Free memory was 84.2 MB in the beginning and 82.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:56:48,459 INFO L168 Benchmark]: Boogie Preprocessor took 19.67 ms. Allocated memory is still 107.0 MB. Free memory was 82.5 MB in the beginning and 81.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:56:48,459 INFO L168 Benchmark]: RCFGBuilder took 449.84 ms. Allocated memory is still 107.0 MB. Free memory was 81.0 MB in the beginning and 41.1 MB in the end (delta: 39.9 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. [2020-12-09 05:56:48,460 INFO L168 Benchmark]: TraceAbstraction took 838.54 ms. Allocated memory is still 107.0 MB. Free memory was 40.6 MB in the beginning and 40.4 MB in the end (delta: 192.4 kB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2020-12-09 05:56:48,460 INFO L168 Benchmark]: Witness Printer took 67.65 ms. Allocated memory is still 107.0 MB. Free memory was 40.4 MB in the beginning and 84.7 MB in the end (delta: -44.3 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2020-12-09 05:56:48,461 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 88.1 MB. Free memory is still 47.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 198.30 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 60.1 MB in the beginning and 84.2 MB in the end (delta: -24.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.62 ms. Allocated memory is still 107.0 MB. Free memory was 84.2 MB in the beginning and 82.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.67 ms. Allocated memory is still 107.0 MB. Free memory was 82.5 MB in the beginning and 81.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 449.84 ms. Allocated memory is still 107.0 MB. Free memory was 81.0 MB in the beginning and 41.1 MB in the end (delta: 39.9 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 838.54 ms. Allocated memory is still 107.0 MB. Free memory was 40.6 MB in the beginning and 40.4 MB in the end (delta: 192.4 kB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. * Witness Printer took 67.65 ms. Allocated memory is still 107.0 MB. Free memory was 40.4 MB in the beginning and 84.7 MB in the end (delta: -44.3 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 163]: 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: 41]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.7s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 370 SDtfs, 312 SDslu, 539 SDs, 0 SdLazy, 90 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 126 StatesRemovedByMinimization, 9 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, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 105 NumberOfCodeBlocks, 105 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 95 ConstructedInterpolants, 0 QuantifiedInterpolants, 4805 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 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...