./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe025_tso.opt.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_a74a4ba6-ffb1-41a5-b5f1-9c3168311b5e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a74a4ba6-ffb1-41a5-b5f1-9c3168311b5e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a74a4ba6-ffb1-41a5-b5f1-9c3168311b5e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a74a4ba6-ffb1-41a5-b5f1-9c3168311b5e/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe025_tso.opt.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a74a4ba6-ffb1-41a5-b5f1-9c3168311b5e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a74a4ba6-ffb1-41a5-b5f1-9c3168311b5e/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 2cb0904590711f61fe562550478334c4bfa7ca51 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 05:02:03,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 05:02:03,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 05:02:03,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 05:02:03,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 05:02:03,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 05:02:03,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 05:02:03,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 05:02:03,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 05:02:03,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 05:02:03,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 05:02:03,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 05:02:03,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 05:02:03,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 05:02:03,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 05:02:03,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 05:02:03,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 05:02:03,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 05:02:03,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 05:02:03,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 05:02:03,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 05:02:03,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 05:02:03,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 05:02:03,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 05:02:03,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 05:02:03,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 05:02:03,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 05:02:03,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 05:02:03,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 05:02:03,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 05:02:03,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 05:02:03,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 05:02:03,278 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 05:02:03,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 05:02:03,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 05:02:03,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 05:02:03,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 05:02:03,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 05:02:03,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 05:02:03,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 05:02:03,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 05:02:03,282 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a74a4ba6-ffb1-41a5-b5f1-9c3168311b5e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 05:02:03,303 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 05:02:03,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 05:02:03,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 05:02:03,304 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 05:02:03,304 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 05:02:03,304 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 05:02:03,305 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 05:02:03,305 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 05:02:03,305 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 05:02:03,305 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 05:02:03,305 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 05:02:03,305 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 05:02:03,305 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 05:02:03,306 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 05:02:03,306 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 05:02:03,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 05:02:03,306 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 05:02:03,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 05:02:03,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 05:02:03,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 05:02:03,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 05:02:03,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 05:02:03,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 05:02:03,307 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 05:02:03,307 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 05:02:03,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 05:02:03,307 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 05:02:03,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 05:02:03,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 05:02:03,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 05:02:03,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:02:03,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 05:02:03,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 05:02:03,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 05:02:03,309 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 05:02:03,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 05:02:03,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 05:02:03,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 05:02:03,309 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 05:02:03,310 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_a74a4ba6-ffb1-41a5-b5f1-9c3168311b5e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a74a4ba6-ffb1-41a5-b5f1-9c3168311b5e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2cb0904590711f61fe562550478334c4bfa7ca51 [2020-12-09 05:02:03,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 05:02:03,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 05:02:03,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 05:02:03,517 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 05:02:03,518 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 05:02:03,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a74a4ba6-ffb1-41a5-b5f1-9c3168311b5e/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/safe025_tso.opt.i [2020-12-09 05:02:03,558 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a74a4ba6-ffb1-41a5-b5f1-9c3168311b5e/bin/utaipan/data/ef39dfc01/0606f460f23f4b19a8949ab7d61e2db3/FLAG25fe4fd7f [2020-12-09 05:02:03,970 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 05:02:03,971 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a74a4ba6-ffb1-41a5-b5f1-9c3168311b5e/sv-benchmarks/c/pthread-wmm/safe025_tso.opt.i [2020-12-09 05:02:03,982 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a74a4ba6-ffb1-41a5-b5f1-9c3168311b5e/bin/utaipan/data/ef39dfc01/0606f460f23f4b19a8949ab7d61e2db3/FLAG25fe4fd7f [2020-12-09 05:02:03,992 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a74a4ba6-ffb1-41a5-b5f1-9c3168311b5e/bin/utaipan/data/ef39dfc01/0606f460f23f4b19a8949ab7d61e2db3 [2020-12-09 05:02:03,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 05:02:03,994 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 05:02:03,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 05:02:03,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 05:02:03,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 05:02:03,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:02:03" (1/1) ... [2020-12-09 05:02:04,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cce5804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:02:03, skipping insertion in model container [2020-12-09 05:02:04,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:02:03" (1/1) ... [2020-12-09 05:02:04,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 05:02:04,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 05:02:04,146 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_a74a4ba6-ffb1-41a5-b5f1-9c3168311b5e/sv-benchmarks/c/pthread-wmm/safe025_tso.opt.i[949,962] [2020-12-09 05:02:04,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:02:04,250 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 05:02:04,258 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_a74a4ba6-ffb1-41a5-b5f1-9c3168311b5e/sv-benchmarks/c/pthread-wmm/safe025_tso.opt.i[949,962] [2020-12-09 05:02:04,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:02:04,330 INFO L208 MainTranslator]: Completed translation [2020-12-09 05:02:04,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:02:04 WrapperNode [2020-12-09 05:02:04,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 05:02:04,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 05:02:04,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 05:02:04,331 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 05:02:04,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:02:04" (1/1) ... [2020-12-09 05:02:04,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:02:04" (1/1) ... [2020-12-09 05:02:04,360 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 05:02:04,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 05:02:04,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 05:02:04,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 05:02:04,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:02:04" (1/1) ... [2020-12-09 05:02:04,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:02:04" (1/1) ... [2020-12-09 05:02:04,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:02:04" (1/1) ... [2020-12-09 05:02:04,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:02:04" (1/1) ... [2020-12-09 05:02:04,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:02:04" (1/1) ... [2020-12-09 05:02:04,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:02:04" (1/1) ... [2020-12-09 05:02:04,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:02:04" (1/1) ... [2020-12-09 05:02:04,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 05:02:04,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 05:02:04,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 05:02:04,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 05:02:04,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:02:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a74a4ba6-ffb1-41a5-b5f1-9c3168311b5e/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:02:04,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 05:02:04,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-09 05:02:04,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 05:02:04,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 05:02:04,443 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-12-09 05:02:04,443 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-12-09 05:02:04,443 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-12-09 05:02:04,443 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-12-09 05:02:04,443 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-12-09 05:02:04,444 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-12-09 05:02:04,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 05:02:04,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-09 05:02:04,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 05:02:04,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 05:02:04,445 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 05:02:04,704 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 05:02:04,704 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 05:02:04,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:02:04 BoogieIcfgContainer [2020-12-09 05:02:04,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 05:02:04,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 05:02:04,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 05:02:04,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 05:02:04,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:02:03" (1/3) ... [2020-12-09 05:02:04,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1588c21c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:02:04, skipping insertion in model container [2020-12-09 05:02:04,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:02:04" (2/3) ... [2020-12-09 05:02:04,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1588c21c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:02:04, skipping insertion in model container [2020-12-09 05:02:04,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:02:04" (3/3) ... [2020-12-09 05:02:04,711 INFO L111 eAbstractionObserver]: Analyzing ICFG safe025_tso.opt.i [2020-12-09 05:02:04,721 WARN L169 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-09 05:02:04,721 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 05:02:04,723 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 05:02:04,723 INFO L354 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-09 05:02:04,744 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,744 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,744 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,744 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,744 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,745 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,745 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,745 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,745 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,745 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,745 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,745 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,746 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,746 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,746 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,746 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,746 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,746 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,746 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,746 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,747 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,747 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,747 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,747 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,747 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,747 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,747 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,748 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,748 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,748 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,748 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,748 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,748 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,748 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,749 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,749 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,750 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,750 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,751 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,751 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,754 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,754 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,754 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,755 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,756 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,757 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,757 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,757 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:02:04,758 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-09 05:02:04,766 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-09 05:02:04,779 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 05:02:04,780 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 05:02:04,780 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 05:02:04,780 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 05:02:04,780 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 05:02:04,780 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 05:02:04,780 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 05:02:04,780 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 05:02:04,788 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-09 05:02:04,789 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 75 transitions, 165 flow [2020-12-09 05:02:04,795 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 75 transitions, 165 flow [2020-12-09 05:02:04,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 75 transitions, 165 flow [2020-12-09 05:02:04,828 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2020-12-09 05:02:04,828 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-09 05:02:04,830 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 72 events. 2/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2020-12-09 05:02:04,832 INFO L116 LiptonReduction]: Number of co-enabled transitions 1296 [2020-12-09 05:02:06,804 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-12-09 05:02:06,999 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-12-09 05:02:07,090 INFO L131 LiptonReduction]: Checked pairs total: 2371 [2020-12-09 05:02:07,090 INFO L133 LiptonReduction]: Total number of compositions: 63 [2020-12-09 05:02:07,094 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 21 transitions, 57 flow [2020-12-09 05:02:07,110 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 298 states. [2020-12-09 05:02:07,111 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states. [2020-12-09 05:02:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 05:02:07,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:02:07,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:02:07,115 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:02:07,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:02:07,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1684989787, now seen corresponding path program 1 times [2020-12-09 05:02:07,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:02:07,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070669512] [2020-12-09 05:02:07,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:02:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:02:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:02:07,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070669512] [2020-12-09 05:02:07,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:02:07,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 05:02:07,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129259771] [2020-12-09 05:02:07,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:02:07,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:02:07,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:02:07,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:02:07,282 INFO L87 Difference]: Start difference. First operand 298 states. Second operand 3 states. [2020-12-09 05:02:07,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:02:07,315 INFO L93 Difference]: Finished difference Result 282 states and 808 transitions. [2020-12-09 05:02:07,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:02:07,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-09 05:02:07,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:02:07,326 INFO L225 Difference]: With dead ends: 282 [2020-12-09 05:02:07,326 INFO L226 Difference]: Without dead ends: 218 [2020-12-09 05:02:07,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:02:07,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-09 05:02:07,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2020-12-09 05:02:07,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-12-09 05:02:07,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 600 transitions. [2020-12-09 05:02:07,368 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 600 transitions. Word has length 8 [2020-12-09 05:02:07,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:02:07,369 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 600 transitions. [2020-12-09 05:02:07,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:02:07,369 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 600 transitions. [2020-12-09 05:02:07,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 05:02:07,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:02:07,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:02:07,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 05:02:07,370 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:02:07,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:02:07,371 INFO L82 PathProgramCache]: Analyzing trace with hash 695075092, now seen corresponding path program 1 times [2020-12-09 05:02:07,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:02:07,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097313624] [2020-12-09 05:02:07,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:02:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:02:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:02:07,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097313624] [2020-12-09 05:02:07,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:02:07,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:02:07,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178296226] [2020-12-09 05:02:07,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:02:07,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:02:07,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:02:07,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:02:07,426 INFO L87 Difference]: Start difference. First operand 218 states and 600 transitions. Second operand 3 states. [2020-12-09 05:02:07,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:02:07,442 INFO L93 Difference]: Finished difference Result 312 states and 816 transitions. [2020-12-09 05:02:07,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:02:07,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-09 05:02:07,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:02:07,445 INFO L225 Difference]: With dead ends: 312 [2020-12-09 05:02:07,445 INFO L226 Difference]: Without dead ends: 296 [2020-12-09 05:02:07,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:02:07,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-12-09 05:02:07,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 262. [2020-12-09 05:02:07,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-09 05:02:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 703 transitions. [2020-12-09 05:02:07,465 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 703 transitions. Word has length 9 [2020-12-09 05:02:07,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:02:07,465 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 703 transitions. [2020-12-09 05:02:07,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:02:07,465 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 703 transitions. [2020-12-09 05:02:07,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 05:02:07,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:02:07,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:02:07,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 05:02:07,467 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:02:07,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:02:07,467 INFO L82 PathProgramCache]: Analyzing trace with hash 72489286, now seen corresponding path program 1 times [2020-12-09 05:02:07,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:02:07,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941070454] [2020-12-09 05:02:07,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:02:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:02:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:02:07,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941070454] [2020-12-09 05:02:07,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:02:07,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 05:02:07,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083857274] [2020-12-09 05:02:07,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:02:07,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:02:07,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:02:07,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:02:07,511 INFO L87 Difference]: Start difference. First operand 262 states and 703 transitions. Second operand 3 states. [2020-12-09 05:02:07,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:02:07,516 INFO L93 Difference]: Finished difference Result 254 states and 677 transitions. [2020-12-09 05:02:07,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:02:07,516 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-09 05:02:07,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:02:07,518 INFO L225 Difference]: With dead ends: 254 [2020-12-09 05:02:07,518 INFO L226 Difference]: Without dead ends: 254 [2020-12-09 05:02:07,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:02:07,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-12-09 05:02:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 238. [2020-12-09 05:02:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-12-09 05:02:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 641 transitions. [2020-12-09 05:02:07,531 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 641 transitions. Word has length 10 [2020-12-09 05:02:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:02:07,531 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 641 transitions. [2020-12-09 05:02:07,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:02:07,531 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 641 transitions. [2020-12-09 05:02:07,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 05:02:07,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:02:07,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:02:07,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 05:02:07,533 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:02:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:02:07,533 INFO L82 PathProgramCache]: Analyzing trace with hash 72490526, now seen corresponding path program 1 times [2020-12-09 05:02:07,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:02:07,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395292684] [2020-12-09 05:02:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:02:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:02:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:02:07,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395292684] [2020-12-09 05:02:07,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:02:07,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:02:07,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580327498] [2020-12-09 05:02:07,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:02:07,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:02:07,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:02:07,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:02:07,569 INFO L87 Difference]: Start difference. First operand 238 states and 641 transitions. Second operand 3 states. [2020-12-09 05:02:07,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:02:07,580 INFO L93 Difference]: Finished difference Result 226 states and 600 transitions. [2020-12-09 05:02:07,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:02:07,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-09 05:02:07,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:02:07,582 INFO L225 Difference]: With dead ends: 226 [2020-12-09 05:02:07,582 INFO L226 Difference]: Without dead ends: 226 [2020-12-09 05:02:07,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:02:07,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-09 05:02:07,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 202. [2020-12-09 05:02:07,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-09 05:02:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 530 transitions. [2020-12-09 05:02:07,590 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 530 transitions. Word has length 10 [2020-12-09 05:02:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:02:07,590 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 530 transitions. [2020-12-09 05:02:07,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:02:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 530 transitions. [2020-12-09 05:02:07,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 05:02:07,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:02:07,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:02:07,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 05:02:07,592 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:02:07,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:02:07,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2036231076, now seen corresponding path program 1 times [2020-12-09 05:02:07,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:02:07,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860644980] [2020-12-09 05:02:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:02:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:02:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:02:07,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860644980] [2020-12-09 05:02:07,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:02:07,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:02:07,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721680796] [2020-12-09 05:02:07,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:02:07,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:02:07,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:02:07,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:02:07,629 INFO L87 Difference]: Start difference. First operand 202 states and 530 transitions. Second operand 4 states. [2020-12-09 05:02:07,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:02:07,646 INFO L93 Difference]: Finished difference Result 282 states and 728 transitions. [2020-12-09 05:02:07,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:02:07,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 05:02:07,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:02:07,648 INFO L225 Difference]: With dead ends: 282 [2020-12-09 05:02:07,648 INFO L226 Difference]: Without dead ends: 178 [2020-12-09 05:02:07,649 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 05:02:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-09 05:02:07,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-12-09 05:02:07,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-09 05:02:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 452 transitions. [2020-12-09 05:02:07,659 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 452 transitions. Word has length 11 [2020-12-09 05:02:07,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:02:07,659 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 452 transitions. [2020-12-09 05:02:07,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:02:07,659 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 452 transitions. [2020-12-09 05:02:07,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 05:02:07,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:02:07,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:02:07,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 05:02:07,661 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:02:07,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:02:07,661 INFO L82 PathProgramCache]: Analyzing trace with hash -2047800276, now seen corresponding path program 2 times [2020-12-09 05:02:07,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:02:07,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455260404] [2020-12-09 05:02:07,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:02:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:02:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:02:07,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455260404] [2020-12-09 05:02:07,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:02:07,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:02:07,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308650107] [2020-12-09 05:02:07,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:02:07,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:02:07,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:02:07,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:02:07,705 INFO L87 Difference]: Start difference. First operand 178 states and 452 transitions. Second operand 4 states. [2020-12-09 05:02:07,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:02:07,723 INFO L93 Difference]: Finished difference Result 206 states and 481 transitions. [2020-12-09 05:02:07,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:02:07,724 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 05:02:07,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:02:07,725 INFO L225 Difference]: With dead ends: 206 [2020-12-09 05:02:07,725 INFO L226 Difference]: Without dead ends: 150 [2020-12-09 05:02:07,725 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 05:02:07,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-09 05:02:07,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-12-09 05:02:07,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-09 05:02:07,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 344 transitions. [2020-12-09 05:02:07,729 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 344 transitions. Word has length 11 [2020-12-09 05:02:07,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:02:07,729 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 344 transitions. [2020-12-09 05:02:07,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:02:07,730 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 344 transitions. [2020-12-09 05:02:07,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 05:02:07,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:02:07,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:02:07,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 05:02:07,730 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:02:07,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:02:07,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1362454825, now seen corresponding path program 1 times [2020-12-09 05:02:07,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:02:07,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172039328] [2020-12-09 05:02:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:02:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:02:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:02:07,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172039328] [2020-12-09 05:02:07,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:02:07,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:02:07,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255714202] [2020-12-09 05:02:07,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 05:02:07,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:02:07,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 05:02:07,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 05:02:07,772 INFO L87 Difference]: Start difference. First operand 150 states and 344 transitions. Second operand 5 states. [2020-12-09 05:02:07,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:02:07,798 INFO L93 Difference]: Finished difference Result 149 states and 319 transitions. [2020-12-09 05:02:07,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 05:02:07,798 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 05:02:07,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:02:07,799 INFO L225 Difference]: With dead ends: 149 [2020-12-09 05:02:07,799 INFO L226 Difference]: Without dead ends: 115 [2020-12-09 05:02:07,799 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 05:02:07,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-09 05:02:07,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-12-09 05:02:07,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-09 05:02:07,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 242 transitions. [2020-12-09 05:02:07,802 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 242 transitions. Word has length 12 [2020-12-09 05:02:07,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:02:07,802 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 242 transitions. [2020-12-09 05:02:07,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 05:02:07,803 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 242 transitions. [2020-12-09 05:02:07,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 05:02:07,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:02:07,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:02:07,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 05:02:07,803 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:02:07,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:02:07,804 INFO L82 PathProgramCache]: Analyzing trace with hash -646579048, now seen corresponding path program 1 times [2020-12-09 05:02:07,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:02:07,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666178776] [2020-12-09 05:02:07,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:02:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:02:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:02:07,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666178776] [2020-12-09 05:02:07,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:02:07,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 05:02:07,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090830013] [2020-12-09 05:02:07,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 05:02:07,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:02:07,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 05:02:07,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 05:02:07,844 INFO L87 Difference]: Start difference. First operand 115 states and 242 transitions. Second operand 6 states. [2020-12-09 05:02:07,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:02:07,881 INFO L93 Difference]: Finished difference Result 110 states and 230 transitions. [2020-12-09 05:02:07,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 05:02:07,882 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-09 05:02:07,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:02:07,882 INFO L225 Difference]: With dead ends: 110 [2020-12-09 05:02:07,882 INFO L226 Difference]: Without dead ends: 92 [2020-12-09 05:02:07,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 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 05:02:07,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-09 05:02:07,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2020-12-09 05:02:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-09 05:02:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 185 transitions. [2020-12-09 05:02:07,885 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 185 transitions. Word has length 14 [2020-12-09 05:02:07,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:02:07,885 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 185 transitions. [2020-12-09 05:02:07,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 05:02:07,885 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 185 transitions. [2020-12-09 05:02:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 05:02:07,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:02:07,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:02:07,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 05:02:07,886 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:02:07,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:02:07,886 INFO L82 PathProgramCache]: Analyzing trace with hash 390859497, now seen corresponding path program 1 times [2020-12-09 05:02:07,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:02:07,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847645888] [2020-12-09 05:02:07,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:02:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:02:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:02:07,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847645888] [2020-12-09 05:02:07,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:02:07,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:02:07,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571368267] [2020-12-09 05:02:07,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:02:07,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:02:07,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:02:07,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:02:07,922 INFO L87 Difference]: Start difference. First operand 88 states and 185 transitions. Second operand 4 states. [2020-12-09 05:02:07,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:02:07,949 INFO L93 Difference]: Finished difference Result 117 states and 238 transitions. [2020-12-09 05:02:07,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 05:02:07,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-09 05:02:07,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:02:07,950 INFO L225 Difference]: With dead ends: 117 [2020-12-09 05:02:07,950 INFO L226 Difference]: Without dead ends: 60 [2020-12-09 05:02:07,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 05:02:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-09 05:02:07,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-12-09 05:02:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-09 05:02:07,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 101 transitions. [2020-12-09 05:02:07,953 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 101 transitions. Word has length 17 [2020-12-09 05:02:07,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:02:07,953 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 101 transitions. [2020-12-09 05:02:07,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:02:07,953 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 101 transitions. [2020-12-09 05:02:07,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 05:02:07,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:02:07,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:02:07,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 05:02:07,954 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:02:07,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:02:07,954 INFO L82 PathProgramCache]: Analyzing trace with hash 321753769, now seen corresponding path program 2 times [2020-12-09 05:02:07,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:02:07,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58023015] [2020-12-09 05:02:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:02:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:02:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:02:07,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58023015] [2020-12-09 05:02:07,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:02:07,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:02:07,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140905406] [2020-12-09 05:02:07,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:02:07,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:02:07,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:02:07,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:02:07,991 INFO L87 Difference]: Start difference. First operand 56 states and 101 transitions. Second operand 4 states. [2020-12-09 05:02:08,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:02:08,001 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2020-12-09 05:02:08,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:02:08,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-09 05:02:08,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:02:08,002 INFO L225 Difference]: With dead ends: 71 [2020-12-09 05:02:08,002 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 05:02:08,002 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 05:02:08,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 05:02:08,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-09 05:02:08,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 05:02:08,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 41 transitions. [2020-12-09 05:02:08,003 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 41 transitions. Word has length 17 [2020-12-09 05:02:08,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:02:08,003 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 41 transitions. [2020-12-09 05:02:08,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:02:08,003 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 41 transitions. [2020-12-09 05:02:08,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 05:02:08,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:02:08,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:02:08,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 05:02:08,004 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:02:08,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:02:08,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1988858199, now seen corresponding path program 3 times [2020-12-09 05:02:08,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:02:08,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102115185] [2020-12-09 05:02:08,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:02:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:02:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:02:08,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102115185] [2020-12-09 05:02:08,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:02:08,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:02:08,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272793223] [2020-12-09 05:02:08,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:02:08,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:02:08,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:02:08,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:02:08,043 INFO L87 Difference]: Start difference. First operand 29 states and 41 transitions. Second operand 4 states. [2020-12-09 05:02:08,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:02:08,053 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2020-12-09 05:02:08,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 05:02:08,054 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-09 05:02:08,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:02:08,054 INFO L225 Difference]: With dead ends: 28 [2020-12-09 05:02:08,054 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 05:02:08,054 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 05:02:08,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 05:02:08,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 05:02:08,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 05:02:08,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 05:02:08,055 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-12-09 05:02:08,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:02:08,055 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 05:02:08,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:02:08,055 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 05:02:08,055 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 05:02:08,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 05:02:08,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:02:08 BasicIcfg [2020-12-09 05:02:08,058 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 05:02:08,059 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 05:02:08,059 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 05:02:08,059 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 05:02:08,059 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:02:04" (3/4) ... [2020-12-09 05:02:08,062 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 05:02:08,068 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-12-09 05:02:08,068 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-12-09 05:02:08,068 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-12-09 05:02:08,072 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-12-09 05:02:08,073 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 05:02:08,073 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 05:02:08,073 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 05:02:08,108 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a74a4ba6-ffb1-41a5-b5f1-9c3168311b5e/bin/utaipan/witness.graphml [2020-12-09 05:02:08,108 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 05:02:08,109 INFO L168 Benchmark]: Toolchain (without parser) took 4113.71 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 50.9 MB in the beginning and 97.6 MB in the end (delta: -46.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:02:08,109 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 92.3 MB. Free memory is still 68.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:02:08,110 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.65 ms. Allocated memory is still 92.3 MB. Free memory was 50.7 MB in the beginning and 43.4 MB in the end (delta: 7.3 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. [2020-12-09 05:02:08,110 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.27 ms. Allocated memory is still 92.3 MB. Free memory was 43.4 MB in the beginning and 41.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:02:08,110 INFO L168 Benchmark]: Boogie Preprocessor took 21.06 ms. Allocated memory is still 92.3 MB. Free memory was 41.4 MB in the beginning and 70.8 MB in the end (delta: -29.4 MB). Peak memory consumption was 2.8 MB. Max. memory is 16.1 GB. [2020-12-09 05:02:08,111 INFO L168 Benchmark]: RCFGBuilder took 323.53 ms. Allocated memory is still 92.3 MB. Free memory was 70.8 MB in the beginning and 51.5 MB in the end (delta: 19.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-12-09 05:02:08,111 INFO L168 Benchmark]: TraceAbstraction took 3351.31 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 51.1 MB in the beginning and 100.7 MB in the end (delta: -49.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:02:08,112 INFO L168 Benchmark]: Witness Printer took 49.10 ms. Allocated memory is still 134.2 MB. Free memory was 100.7 MB in the beginning and 97.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 05:02:08,114 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 92.3 MB. Free memory is still 68.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 334.65 ms. Allocated memory is still 92.3 MB. Free memory was 50.7 MB in the beginning and 43.4 MB in the end (delta: 7.3 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.27 ms. Allocated memory is still 92.3 MB. Free memory was 43.4 MB in the beginning and 41.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.06 ms. Allocated memory is still 92.3 MB. Free memory was 41.4 MB in the beginning and 70.8 MB in the end (delta: -29.4 MB). Peak memory consumption was 2.8 MB. Max. memory is 16.1 GB. * RCFGBuilder took 323.53 ms. Allocated memory is still 92.3 MB. Free memory was 70.8 MB in the beginning and 51.5 MB in the end (delta: 19.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3351.31 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 51.1 MB in the beginning and 100.7 MB in the end (delta: -49.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 49.10 ms. Allocated memory is still 134.2 MB. Free memory was 100.7 MB in the beginning and 97.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 831 VarBasedMoverChecksPositive, 41 VarBasedMoverChecksNegative, 10 SemBasedMoverChecksPositive, 31 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 64 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.2s, 83 PlacesBefore, 31 PlacesAfterwards, 75 TransitionsBefore, 21 TransitionsAfterwards, 1296 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 2 ChoiceCompositions, 63 TotalNumberOfCompositions, 2371 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, 74 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.2s, OverallIterations: 11, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 194 SDtfs, 225 SDslu, 183 SDs, 0 SdLazy, 101 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=298occurred 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, 82 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 136 NumberOfCodeBlocks, 136 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 125 ConstructedInterpolants, 0 QuantifiedInterpolants, 4604 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...