./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe009_pso.oepc.i --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_e769fff2-3fef-4db9-a8c8-051fb61a4835/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e769fff2-3fef-4db9-a8c8-051fb61a4835/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e769fff2-3fef-4db9-a8c8-051fb61a4835/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e769fff2-3fef-4db9-a8c8-051fb61a4835/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe009_pso.oepc.i -s /tmp/vcloud-vcloud-master/worker/run_dir_e769fff2-3fef-4db9-a8c8-051fb61a4835/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e769fff2-3fef-4db9-a8c8-051fb61a4835/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 5e3a13afdd4064627690571de84930a283adde5b .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 10:28:01,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 10:28:01,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 10:28:01,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 10:28:01,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 10:28:01,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 10:28:01,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 10:28:01,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 10:28:01,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 10:28:01,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 10:28:01,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 10:28:01,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 10:28:01,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 10:28:01,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 10:28:01,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 10:28:01,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 10:28:01,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 10:28:01,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 10:28:01,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 10:28:01,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 10:28:01,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 10:28:01,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 10:28:01,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 10:28:01,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 10:28:01,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 10:28:01,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 10:28:01,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 10:28:01,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 10:28:01,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 10:28:01,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 10:28:01,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 10:28:01,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 10:28:01,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 10:28:01,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 10:28:01,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 10:28:01,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 10:28:01,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 10:28:01,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 10:28:01,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 10:28:01,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 10:28:01,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 10:28:01,904 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e769fff2-3fef-4db9-a8c8-051fb61a4835/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 10:28:01,921 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 10:28:01,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 10:28:01,922 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 10:28:01,922 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 10:28:01,922 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 10:28:01,923 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 10:28:01,923 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 10:28:01,923 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 10:28:01,923 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 10:28:01,924 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 10:28:01,924 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 10:28:01,924 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 10:28:01,924 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 10:28:01,924 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 10:28:01,925 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 10:28:01,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 10:28:01,925 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 10:28:01,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 10:28:01,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 10:28:01,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 10:28:01,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 10:28:01,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 10:28:01,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 10:28:01,926 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 10:28:01,926 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 10:28:01,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 10:28:01,926 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 10:28:01,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 10:28:01,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 10:28:01,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 10:28:01,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 10:28:01,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 10:28:01,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 10:28:01,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 10:28:01,927 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 10:28:01,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 10:28:01,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 10:28:01,928 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 10:28:01,928 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 10:28:01,928 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_e769fff2-3fef-4db9-a8c8-051fb61a4835/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e769fff2-3fef-4db9-a8c8-051fb61a4835/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5e3a13afdd4064627690571de84930a283adde5b [2020-12-09 10:28:02,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 10:28:02,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 10:28:02,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 10:28:02,129 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 10:28:02,129 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 10:28:02,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e769fff2-3fef-4db9-a8c8-051fb61a4835/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/safe009_pso.oepc.i [2020-12-09 10:28:02,169 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e769fff2-3fef-4db9-a8c8-051fb61a4835/bin/utaipan/data/ee89c774f/60f54329f0444006be7218d00ad528cb/FLAGf3e1fb427 [2020-12-09 10:28:02,582 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 10:28:02,583 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e769fff2-3fef-4db9-a8c8-051fb61a4835/sv-benchmarks/c/pthread-wmm/safe009_pso.oepc.i [2020-12-09 10:28:02,594 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e769fff2-3fef-4db9-a8c8-051fb61a4835/bin/utaipan/data/ee89c774f/60f54329f0444006be7218d00ad528cb/FLAGf3e1fb427 [2020-12-09 10:28:02,972 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e769fff2-3fef-4db9-a8c8-051fb61a4835/bin/utaipan/data/ee89c774f/60f54329f0444006be7218d00ad528cb [2020-12-09 10:28:02,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 10:28:02,981 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 10:28:02,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 10:28:02,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 10:28:02,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 10:28:02,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:28:02" (1/1) ... [2020-12-09 10:28:02,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4361d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:28:02, skipping insertion in model container [2020-12-09 10:28:02,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:28:02" (1/1) ... [2020-12-09 10:28:02,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 10:28:03,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 10:28:03,125 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_e769fff2-3fef-4db9-a8c8-051fb61a4835/sv-benchmarks/c/pthread-wmm/safe009_pso.oepc.i[950,963] [2020-12-09 10:28:03,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:28:03,228 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 10:28:03,237 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_e769fff2-3fef-4db9-a8c8-051fb61a4835/sv-benchmarks/c/pthread-wmm/safe009_pso.oepc.i[950,963] [2020-12-09 10:28:03,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:28:03,316 INFO L208 MainTranslator]: Completed translation [2020-12-09 10:28:03,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:28:03 WrapperNode [2020-12-09 10:28:03,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 10:28:03,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 10:28:03,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 10:28:03,318 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 10:28:03,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:28:03" (1/1) ... [2020-12-09 10:28:03,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:28:03" (1/1) ... [2020-12-09 10:28:03,346 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 10:28:03,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 10:28:03,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 10:28:03,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 10:28:03,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:28:03" (1/1) ... [2020-12-09 10:28:03,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:28:03" (1/1) ... [2020-12-09 10:28:03,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:28:03" (1/1) ... [2020-12-09 10:28:03,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:28:03" (1/1) ... [2020-12-09 10:28:03,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:28:03" (1/1) ... [2020-12-09 10:28:03,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:28:03" (1/1) ... [2020-12-09 10:28:03,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:28:03" (1/1) ... [2020-12-09 10:28:03,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 10:28:03,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 10:28:03,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 10:28:03,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 10:28:03,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:28:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e769fff2-3fef-4db9-a8c8-051fb61a4835/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 10:28:03,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 10:28:03,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-09 10:28:03,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 10:28:03,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 10:28:03,438 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-12-09 10:28:03,438 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-12-09 10:28:03,438 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-12-09 10:28:03,438 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-12-09 10:28:03,438 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-12-09 10:28:03,438 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-12-09 10:28:03,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 10:28:03,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-09 10:28:03,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 10:28:03,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 10:28:03,444 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-09 10:28:03,697 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 10:28:03,697 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 10:28:03,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:28:03 BoogieIcfgContainer [2020-12-09 10:28:03,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 10:28:03,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 10:28:03,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 10:28:03,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 10:28:03,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 10:28:02" (1/3) ... [2020-12-09 10:28:03,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9cefd5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:28:03, skipping insertion in model container [2020-12-09 10:28:03,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:28:03" (2/3) ... [2020-12-09 10:28:03,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9cefd5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:28:03, skipping insertion in model container [2020-12-09 10:28:03,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:28:03" (3/3) ... [2020-12-09 10:28:03,706 INFO L111 eAbstractionObserver]: Analyzing ICFG safe009_pso.oepc.i [2020-12-09 10:28:03,716 WARN L169 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-09 10:28:03,716 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 10:28:03,719 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 10:28:03,719 INFO L354 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-09 10:28:03,738 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,739 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,739 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,739 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,739 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,739 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,739 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,739 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,740 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,740 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,740 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,740 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,740 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,740 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,740 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,741 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,741 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,741 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,741 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,741 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,741 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,741 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,741 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,742 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,742 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,742 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,742 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,742 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,742 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,742 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,742 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,742 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,743 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,743 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,743 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,743 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,745 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,745 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,745 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,745 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,748 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,749 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,749 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,749 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,750 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,750 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,750 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,751 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 10:28:03,752 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-09 10:28:03,759 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-09 10:28:03,774 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 10:28:03,774 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 10:28:03,774 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 10:28:03,774 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 10:28:03,774 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 10:28:03,774 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 10:28:03,774 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 10:28:03,774 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 10:28:03,782 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-09 10:28:03,783 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 73 transitions, 161 flow [2020-12-09 10:28:03,785 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 73 transitions, 161 flow [2020-12-09 10:28:03,787 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 81 places, 73 transitions, 161 flow [2020-12-09 10:28:03,817 INFO L129 PetriNetUnfolder]: 2/70 cut-off events. [2020-12-09 10:28:03,817 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-09 10:28:03,819 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 70 events. 2/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2020-12-09 10:28:03,821 INFO L116 LiptonReduction]: Number of co-enabled transitions 1220 [2020-12-09 10:28:05,395 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-12-09 10:28:05,594 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-12-09 10:28:05,706 INFO L131 LiptonReduction]: Checked pairs total: 2044 [2020-12-09 10:28:05,706 INFO L133 LiptonReduction]: Total number of compositions: 61 [2020-12-09 10:28:05,710 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 22 transitions, 59 flow [2020-12-09 10:28:05,729 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 282 states. [2020-12-09 10:28:05,730 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states. [2020-12-09 10:28:05,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 10:28:05,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:28:05,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:28:05,735 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:28:05,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:28:05,740 INFO L82 PathProgramCache]: Analyzing trace with hash 622846231, now seen corresponding path program 1 times [2020-12-09 10:28:05,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:28:05,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834900189] [2020-12-09 10:28:05,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:28:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:28:05,866 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 10:28:05,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834900189] [2020-12-09 10:28:05,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:28:05,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:28:05,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976665273] [2020-12-09 10:28:05,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 10:28:05,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:28:05,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 10:28:05,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 10:28:05,881 INFO L87 Difference]: Start difference. First operand 282 states. Second operand 2 states. [2020-12-09 10:28:05,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:28:05,900 INFO L93 Difference]: Finished difference Result 282 states and 808 transitions. [2020-12-09 10:28:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 10:28:05,900 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-09 10:28:05,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:28:05,910 INFO L225 Difference]: With dead ends: 282 [2020-12-09 10:28:05,910 INFO L226 Difference]: Without dead ends: 234 [2020-12-09 10:28:05,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 10:28:05,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-12-09 10:28:05,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2020-12-09 10:28:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-12-09 10:28:05,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 656 transitions. [2020-12-09 10:28:05,955 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 656 transitions. Word has length 8 [2020-12-09 10:28:05,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:28:05,956 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 656 transitions. [2020-12-09 10:28:05,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 10:28:05,956 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 656 transitions. [2020-12-09 10:28:05,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 10:28:05,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:28:05,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:28:05,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 10:28:05,957 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:28:05,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:28:05,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2128318799, now seen corresponding path program 1 times [2020-12-09 10:28:05,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:28:05,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698074344] [2020-12-09 10:28:05,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:28:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:28:06,037 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 10:28:06,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698074344] [2020-12-09 10:28:06,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:28:06,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:28:06,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075619825] [2020-12-09 10:28:06,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:28:06,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:28:06,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:28:06,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:28:06,040 INFO L87 Difference]: Start difference. First operand 234 states and 656 transitions. Second operand 4 states. [2020-12-09 10:28:06,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:28:06,071 INFO L93 Difference]: Finished difference Result 402 states and 1050 transitions. [2020-12-09 10:28:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 10:28:06,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 10:28:06,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:28:06,074 INFO L225 Difference]: With dead ends: 402 [2020-12-09 10:28:06,074 INFO L226 Difference]: Without dead ends: 308 [2020-12-09 10:28:06,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:28:06,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-12-09 10:28:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 264. [2020-12-09 10:28:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-12-09 10:28:06,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 712 transitions. [2020-12-09 10:28:06,092 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 712 transitions. Word has length 9 [2020-12-09 10:28:06,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:28:06,092 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 712 transitions. [2020-12-09 10:28:06,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:28:06,092 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 712 transitions. [2020-12-09 10:28:06,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 10:28:06,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:28:06,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:28:06,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 10:28:06,094 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:28:06,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:28:06,095 INFO L82 PathProgramCache]: Analyzing trace with hash 503221834, now seen corresponding path program 1 times [2020-12-09 10:28:06,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:28:06,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143486606] [2020-12-09 10:28:06,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:28:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:28:06,146 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 10:28:06,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143486606] [2020-12-09 10:28:06,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:28:06,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:28:06,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009782467] [2020-12-09 10:28:06,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 10:28:06,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:28:06,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 10:28:06,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:28:06,148 INFO L87 Difference]: Start difference. First operand 264 states and 712 transitions. Second operand 5 states. [2020-12-09 10:28:06,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:28:06,185 INFO L93 Difference]: Finished difference Result 345 states and 864 transitions. [2020-12-09 10:28:06,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 10:28:06,185 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 10:28:06,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:28:06,188 INFO L225 Difference]: With dead ends: 345 [2020-12-09 10:28:06,188 INFO L226 Difference]: Without dead ends: 278 [2020-12-09 10:28:06,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 10:28:06,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-12-09 10:28:06,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 246. [2020-12-09 10:28:06,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-12-09 10:28:06,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 648 transitions. [2020-12-09 10:28:06,204 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 648 transitions. Word has length 10 [2020-12-09 10:28:06,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:28:06,204 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 648 transitions. [2020-12-09 10:28:06,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 10:28:06,204 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 648 transitions. [2020-12-09 10:28:06,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 10:28:06,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:28:06,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:28:06,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 10:28:06,207 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:28:06,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:28:06,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1553300282, now seen corresponding path program 1 times [2020-12-09 10:28:06,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:28:06,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105488689] [2020-12-09 10:28:06,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:28:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:28:06,265 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 10:28:06,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105488689] [2020-12-09 10:28:06,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:28:06,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:28:06,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61248378] [2020-12-09 10:28:06,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 10:28:06,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:28:06,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 10:28:06,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:28:06,268 INFO L87 Difference]: Start difference. First operand 246 states and 648 transitions. Second operand 5 states. [2020-12-09 10:28:06,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:28:06,306 INFO L93 Difference]: Finished difference Result 298 states and 740 transitions. [2020-12-09 10:28:06,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 10:28:06,307 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 10:28:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:28:06,309 INFO L225 Difference]: With dead ends: 298 [2020-12-09 10:28:06,309 INFO L226 Difference]: Without dead ends: 254 [2020-12-09 10:28:06,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 10:28:06,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-12-09 10:28:06,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 222. [2020-12-09 10:28:06,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-09 10:28:06,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 576 transitions. [2020-12-09 10:28:06,318 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 576 transitions. Word has length 10 [2020-12-09 10:28:06,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:28:06,318 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 576 transitions. [2020-12-09 10:28:06,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 10:28:06,319 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 576 transitions. [2020-12-09 10:28:06,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 10:28:06,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:28:06,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:28:06,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 10:28:06,320 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:28:06,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:28:06,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1580065377, now seen corresponding path program 1 times [2020-12-09 10:28:06,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:28:06,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731478129] [2020-12-09 10:28:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:28:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:28:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:28:06,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731478129] [2020-12-09 10:28:06,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:28:06,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:28:06,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739593744] [2020-12-09 10:28:06,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 10:28:06,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:28:06,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 10:28:06,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:28:06,365 INFO L87 Difference]: Start difference. First operand 222 states and 576 transitions. Second operand 5 states. [2020-12-09 10:28:06,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:28:06,401 INFO L93 Difference]: Finished difference Result 266 states and 662 transitions. [2020-12-09 10:28:06,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 10:28:06,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 10:28:06,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:28:06,402 INFO L225 Difference]: With dead ends: 266 [2020-12-09 10:28:06,402 INFO L226 Difference]: Without dead ends: 242 [2020-12-09 10:28:06,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 10:28:06,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-12-09 10:28:06,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 210. [2020-12-09 10:28:06,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-12-09 10:28:06,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 538 transitions. [2020-12-09 10:28:06,408 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 538 transitions. Word has length 11 [2020-12-09 10:28:06,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:28:06,408 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 538 transitions. [2020-12-09 10:28:06,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 10:28:06,409 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 538 transitions. [2020-12-09 10:28:06,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 10:28:06,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:28:06,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:28:06,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 10:28:06,410 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:28:06,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:28:06,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1430850506, now seen corresponding path program 1 times [2020-12-09 10:28:06,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:28:06,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955830341] [2020-12-09 10:28:06,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:28:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:28:06,456 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 10:28:06,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955830341] [2020-12-09 10:28:06,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:28:06,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 10:28:06,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779849492] [2020-12-09 10:28:06,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 10:28:06,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:28:06,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 10:28:06,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 10:28:06,458 INFO L87 Difference]: Start difference. First operand 210 states and 538 transitions. Second operand 6 states. [2020-12-09 10:28:06,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:28:06,488 INFO L93 Difference]: Finished difference Result 300 states and 745 transitions. [2020-12-09 10:28:06,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 10:28:06,489 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-09 10:28:06,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:28:06,490 INFO L225 Difference]: With dead ends: 300 [2020-12-09 10:28:06,490 INFO L226 Difference]: Without dead ends: 180 [2020-12-09 10:28:06,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-09 10:28:06,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-09 10:28:06,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 156. [2020-12-09 10:28:06,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-12-09 10:28:06,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 390 transitions. [2020-12-09 10:28:06,495 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 390 transitions. Word has length 12 [2020-12-09 10:28:06,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:28:06,495 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 390 transitions. [2020-12-09 10:28:06,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 10:28:06,495 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 390 transitions. [2020-12-09 10:28:06,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 10:28:06,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:28:06,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:28:06,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 10:28:06,496 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:28:06,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:28:06,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1400741867, now seen corresponding path program 1 times [2020-12-09 10:28:06,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:28:06,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705695908] [2020-12-09 10:28:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:28:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:28:06,526 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 10:28:06,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705695908] [2020-12-09 10:28:06,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:28:06,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 10:28:06,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821205037] [2020-12-09 10:28:06,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 10:28:06,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:28:06,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 10:28:06,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:28:06,527 INFO L87 Difference]: Start difference. First operand 156 states and 390 transitions. Second operand 5 states. [2020-12-09 10:28:06,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:28:06,557 INFO L93 Difference]: Finished difference Result 254 states and 611 transitions. [2020-12-09 10:28:06,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 10:28:06,558 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 10:28:06,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:28:06,559 INFO L225 Difference]: With dead ends: 254 [2020-12-09 10:28:06,559 INFO L226 Difference]: Without dead ends: 144 [2020-12-09 10:28:06,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 10:28:06,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-09 10:28:06,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 120. [2020-12-09 10:28:06,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-09 10:28:06,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 282 transitions. [2020-12-09 10:28:06,562 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 282 transitions. Word has length 12 [2020-12-09 10:28:06,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:28:06,563 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 282 transitions. [2020-12-09 10:28:06,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 10:28:06,563 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 282 transitions. [2020-12-09 10:28:06,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 10:28:06,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:28:06,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:28:06,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 10:28:06,564 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:28:06,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:28:06,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1013965314, now seen corresponding path program 2 times [2020-12-09 10:28:06,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:28:06,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411145945] [2020-12-09 10:28:06,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:28:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:28:06,594 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 10:28:06,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411145945] [2020-12-09 10:28:06,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:28:06,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:28:06,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485175171] [2020-12-09 10:28:06,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 10:28:06,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:28:06,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 10:28:06,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:28:06,595 INFO L87 Difference]: Start difference. First operand 120 states and 282 transitions. Second operand 5 states. [2020-12-09 10:28:06,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:28:06,621 INFO L93 Difference]: Finished difference Result 134 states and 299 transitions. [2020-12-09 10:28:06,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 10:28:06,621 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 10:28:06,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:28:06,622 INFO L225 Difference]: With dead ends: 134 [2020-12-09 10:28:06,622 INFO L226 Difference]: Without dead ends: 56 [2020-12-09 10:28:06,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 10:28:06,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-09 10:28:06,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-09 10:28:06,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-09 10:28:06,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 113 transitions. [2020-12-09 10:28:06,624 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 113 transitions. Word has length 12 [2020-12-09 10:28:06,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:28:06,624 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 113 transitions. [2020-12-09 10:28:06,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 10:28:06,624 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 113 transitions. [2020-12-09 10:28:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 10:28:06,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:28:06,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:28:06,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 10:28:06,625 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:28:06,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:28:06,625 INFO L82 PathProgramCache]: Analyzing trace with hash 776645246, now seen corresponding path program 1 times [2020-12-09 10:28:06,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:28:06,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386316764] [2020-12-09 10:28:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:28:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:28:06,656 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 10:28:06,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386316764] [2020-12-09 10:28:06,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:28:06,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:28:06,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826542637] [2020-12-09 10:28:06,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:28:06,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:28:06,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:28:06,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:28:06,658 INFO L87 Difference]: Start difference. First operand 56 states and 113 transitions. Second operand 4 states. [2020-12-09 10:28:06,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:28:06,671 INFO L93 Difference]: Finished difference Result 58 states and 102 transitions. [2020-12-09 10:28:06,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:28:06,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-09 10:28:06,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:28:06,672 INFO L225 Difference]: With dead ends: 58 [2020-12-09 10:28:06,672 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 10:28:06,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:28:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 10:28:06,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-09 10:28:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-09 10:28:06,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 78 transitions. [2020-12-09 10:28:06,673 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 78 transitions. Word has length 13 [2020-12-09 10:28:06,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:28:06,674 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 78 transitions. [2020-12-09 10:28:06,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:28:06,674 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 78 transitions. [2020-12-09 10:28:06,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 10:28:06,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:28:06,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:28:06,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 10:28:06,674 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:28:06,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:28:06,675 INFO L82 PathProgramCache]: Analyzing trace with hash -809970744, now seen corresponding path program 1 times [2020-12-09 10:28:06,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:28:06,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19023268] [2020-12-09 10:28:06,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:28:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:28:06,711 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 10:28:06,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19023268] [2020-12-09 10:28:06,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:28:06,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 10:28:06,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072449299] [2020-12-09 10:28:06,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 10:28:06,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:28:06,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 10:28:06,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:28:06,713 INFO L87 Difference]: Start difference. First operand 45 states and 78 transitions. Second operand 5 states. [2020-12-09 10:28:06,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:28:06,739 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2020-12-09 10:28:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 10:28:06,740 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-09 10:28:06,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:28:06,740 INFO L225 Difference]: With dead ends: 35 [2020-12-09 10:28:06,741 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 10:28:06,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 10:28:06,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 10:28:06,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-09 10:28:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 10:28:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2020-12-09 10:28:06,742 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 14 [2020-12-09 10:28:06,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:28:06,743 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2020-12-09 10:28:06,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 10:28:06,743 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2020-12-09 10:28:06,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 10:28:06,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:28:06,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:28:06,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 10:28:06,744 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:28:06,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:28:06,744 INFO L82 PathProgramCache]: Analyzing trace with hash -145595207, now seen corresponding path program 1 times [2020-12-09 10:28:06,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:28:06,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825568348] [2020-12-09 10:28:06,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:28:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:28:06,789 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 10:28:06,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825568348] [2020-12-09 10:28:06,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:28:06,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 10:28:06,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178284858] [2020-12-09 10:28:06,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 10:28:06,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:28:06,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 10:28:06,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 10:28:06,791 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand 6 states. [2020-12-09 10:28:06,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:28:06,822 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2020-12-09 10:28:06,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 10:28:06,823 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-09 10:28:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:28:06,823 INFO L225 Difference]: With dead ends: 21 [2020-12-09 10:28:06,823 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 10:28:06,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-09 10:28:06,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 10:28:06,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 10:28:06,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 10:28:06,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 10:28:06,824 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-12-09 10:28:06,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:28:06,825 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 10:28:06,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 10:28:06,825 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 10:28:06,825 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 10:28:06,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 10:28:06,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 10:28:06 BasicIcfg [2020-12-09 10:28:06,828 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 10:28:06,828 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 10:28:06,828 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 10:28:06,829 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 10:28:06,829 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:28:03" (3/4) ... [2020-12-09 10:28:06,832 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 10:28:06,837 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-12-09 10:28:06,837 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-12-09 10:28:06,838 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-12-09 10:28:06,841 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-12-09 10:28:06,842 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 10:28:06,842 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 10:28:06,842 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 10:28:06,868 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e769fff2-3fef-4db9-a8c8-051fb61a4835/bin/utaipan/witness.graphml [2020-12-09 10:28:06,868 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 10:28:06,869 INFO L168 Benchmark]: Toolchain (without parser) took 3887.85 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 74.5 MB in the beginning and 65.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 30.7 MB. Max. memory is 16.1 GB. [2020-12-09 10:28:06,869 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 69.2 MB. Free memory was 44.5 MB in the beginning and 44.4 MB in the end (delta: 67.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:28:06,869 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.10 ms. Allocated memory is still 98.6 MB. Free memory was 74.1 MB in the beginning and 70.0 MB in the end (delta: 4.1 MB). Peak memory consumption was 29.9 MB. Max. memory is 16.1 GB. [2020-12-09 10:28:06,870 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.62 ms. Allocated memory is still 98.6 MB. Free memory was 70.0 MB in the beginning and 67.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:28:06,870 INFO L168 Benchmark]: Boogie Preprocessor took 17.57 ms. Allocated memory is still 98.6 MB. Free memory was 67.9 MB in the beginning and 66.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:28:06,871 INFO L168 Benchmark]: RCFGBuilder took 334.69 ms. Allocated memory is still 98.6 MB. Free memory was 66.4 MB in the beginning and 56.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 10:28:06,871 INFO L168 Benchmark]: TraceAbstraction took 3127.10 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 56.0 MB in the beginning and 67.2 MB in the end (delta: -11.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. [2020-12-09 10:28:06,871 INFO L168 Benchmark]: Witness Printer took 39.49 ms. Allocated memory is still 119.5 MB. Free memory was 67.2 MB in the beginning and 65.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:28:06,874 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 69.2 MB. Free memory was 44.5 MB in the beginning and 44.4 MB in the end (delta: 67.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 334.10 ms. Allocated memory is still 98.6 MB. Free memory was 74.1 MB in the beginning and 70.0 MB in the end (delta: 4.1 MB). Peak memory consumption was 29.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.62 ms. Allocated memory is still 98.6 MB. Free memory was 70.0 MB in the beginning and 67.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.57 ms. Allocated memory is still 98.6 MB. Free memory was 67.9 MB in the beginning and 66.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 334.69 ms. Allocated memory is still 98.6 MB. Free memory was 66.4 MB in the beginning and 56.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3127.10 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 56.0 MB in the beginning and 67.2 MB in the end (delta: -11.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. * Witness Printer took 39.49 ms. Allocated memory is still 119.5 MB. Free memory was 67.2 MB in the beginning and 65.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 799 VarBasedMoverChecksPositive, 35 VarBasedMoverChecksNegative, 7 SemBasedMoverChecksPositive, 28 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 65 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.9s, 81 PlacesBefore, 31 PlacesAfterwards, 73 TransitionsBefore, 22 TransitionsAfterwards, 1220 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 38 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 1 ChoiceCompositions, 61 TotalNumberOfCompositions, 2044 MoverChecksTotal - PositiveResult [Line: 18]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.0s, OverallIterations: 11, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 236 SDtfs, 261 SDslu, 362 SDs, 0 SdLazy, 136 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 58 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=282occurred 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, 11 MinimizatonAttempts, 188 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 115 ConstructedInterpolants, 0 QuantifiedInterpolants, 5242 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 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...