./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe002_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_fe308f05-99e9-4194-9072-443651b65422/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fe308f05-99e9-4194-9072-443651b65422/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fe308f05-99e9-4194-9072-443651b65422/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fe308f05-99e9-4194-9072-443651b65422/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe002_tso.opt.i -s /tmp/vcloud-vcloud-master/worker/run_dir_fe308f05-99e9-4194-9072-443651b65422/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fe308f05-99e9-4194-9072-443651b65422/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 9839125b5a4d74faffc5f8180766feb54b289091 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 19:59:17,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 19:59:17,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 19:59:17,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 19:59:17,406 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 19:59:17,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 19:59:17,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 19:59:17,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 19:59:17,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 19:59:17,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 19:59:17,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 19:59:17,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 19:59:17,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 19:59:17,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 19:59:17,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 19:59:17,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 19:59:17,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 19:59:17,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 19:59:17,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 19:59:17,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 19:59:17,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 19:59:17,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 19:59:17,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 19:59:17,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 19:59:17,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 19:59:17,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 19:59:17,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 19:59:17,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 19:59:17,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 19:59:17,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 19:59:17,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 19:59:17,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 19:59:17,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 19:59:17,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 19:59:17,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 19:59:17,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 19:59:17,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 19:59:17,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 19:59:17,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 19:59:17,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 19:59:17,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 19:59:17,446 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fe308f05-99e9-4194-9072-443651b65422/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 19:59:17,470 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 19:59:17,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 19:59:17,471 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 19:59:17,471 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 19:59:17,471 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 19:59:17,471 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 19:59:17,471 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 19:59:17,471 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 19:59:17,472 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 19:59:17,472 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 19:59:17,472 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 19:59:17,472 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 19:59:17,472 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 19:59:17,472 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 19:59:17,472 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 19:59:17,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 19:59:17,473 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 19:59:17,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 19:59:17,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 19:59:17,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 19:59:17,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 19:59:17,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 19:59:17,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 19:59:17,474 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 19:59:17,474 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 19:59:17,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 19:59:17,474 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 19:59:17,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 19:59:17,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 19:59:17,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 19:59:17,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:59:17,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 19:59:17,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 19:59:17,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 19:59:17,475 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 19:59:17,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 19:59:17,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 19:59:17,476 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 19:59:17,476 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 19:59:17,476 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_fe308f05-99e9-4194-9072-443651b65422/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fe308f05-99e9-4194-9072-443651b65422/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9839125b5a4d74faffc5f8180766feb54b289091 [2020-12-09 19:59:17,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 19:59:17,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 19:59:17,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 19:59:17,681 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 19:59:17,681 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 19:59:17,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fe308f05-99e9-4194-9072-443651b65422/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/safe002_tso.opt.i [2020-12-09 19:59:17,723 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fe308f05-99e9-4194-9072-443651b65422/bin/utaipan/data/3ae4c44f4/b277531108b44233b2ed549a87321264/FLAGba5d06d45 [2020-12-09 19:59:18,135 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 19:59:18,135 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fe308f05-99e9-4194-9072-443651b65422/sv-benchmarks/c/pthread-wmm/safe002_tso.opt.i [2020-12-09 19:59:18,147 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fe308f05-99e9-4194-9072-443651b65422/bin/utaipan/data/3ae4c44f4/b277531108b44233b2ed549a87321264/FLAGba5d06d45 [2020-12-09 19:59:18,157 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fe308f05-99e9-4194-9072-443651b65422/bin/utaipan/data/3ae4c44f4/b277531108b44233b2ed549a87321264 [2020-12-09 19:59:18,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 19:59:18,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 19:59:18,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 19:59:18,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 19:59:18,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 19:59:18,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:59:18" (1/1) ... [2020-12-09 19:59:18,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@249dcbce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:59:18, skipping insertion in model container [2020-12-09 19:59:18,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:59:18" (1/1) ... [2020-12-09 19:59:18,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 19:59:18,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 19:59:18,319 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_fe308f05-99e9-4194-9072-443651b65422/sv-benchmarks/c/pthread-wmm/safe002_tso.opt.i[949,962] [2020-12-09 19:59:18,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:59:18,451 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 19:59:18,462 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_fe308f05-99e9-4194-9072-443651b65422/sv-benchmarks/c/pthread-wmm/safe002_tso.opt.i[949,962] [2020-12-09 19:59:18,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:59:18,591 INFO L208 MainTranslator]: Completed translation [2020-12-09 19:59:18,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:59:18 WrapperNode [2020-12-09 19:59:18,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 19:59:18,592 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 19:59:18,592 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 19:59:18,592 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 19:59:18,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:59:18" (1/1) ... [2020-12-09 19:59:18,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:59:18" (1/1) ... [2020-12-09 19:59:18,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 19:59:18,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 19:59:18,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 19:59:18,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 19:59:18,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:59:18" (1/1) ... [2020-12-09 19:59:18,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:59:18" (1/1) ... [2020-12-09 19:59:18,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:59:18" (1/1) ... [2020-12-09 19:59:18,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:59:18" (1/1) ... [2020-12-09 19:59:18,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:59:18" (1/1) ... [2020-12-09 19:59:18,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:59:18" (1/1) ... [2020-12-09 19:59:18,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:59:18" (1/1) ... [2020-12-09 19:59:18,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 19:59:18,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 19:59:18,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 19:59:18,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 19:59:18,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:59:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe308f05-99e9-4194-9072-443651b65422/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 19:59:18,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 19:59:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-09 19:59:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 19:59:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 19:59:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-12-09 19:59:18,708 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-12-09 19:59:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-12-09 19:59:18,708 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-12-09 19:59:18,709 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-12-09 19:59:18,709 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-12-09 19:59:18,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 19:59:18,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-09 19:59:18,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 19:59:18,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 19:59:18,711 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 19:59:18,942 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 19:59:18,942 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 19:59:18,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:59:18 BoogieIcfgContainer [2020-12-09 19:59:18,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 19:59:18,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 19:59:18,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 19:59:18,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 19:59:18,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:59:18" (1/3) ... [2020-12-09 19:59:18,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f62fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:59:18, skipping insertion in model container [2020-12-09 19:59:18,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:59:18" (2/3) ... [2020-12-09 19:59:18,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f62fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:59:18, skipping insertion in model container [2020-12-09 19:59:18,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:59:18" (3/3) ... [2020-12-09 19:59:18,949 INFO L111 eAbstractionObserver]: Analyzing ICFG safe002_tso.opt.i [2020-12-09 19:59:18,959 WARN L169 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-09 19:59:18,959 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 19:59:18,961 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 19:59:18,962 INFO L354 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-09 19:59:18,983 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,983 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,984 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,984 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,984 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,984 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,984 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,985 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,985 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,985 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,986 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,986 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,986 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,986 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,987 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,987 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,987 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,987 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,987 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,987 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,988 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,988 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,988 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,988 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,989 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,989 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,989 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,989 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,990 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,990 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,990 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,990 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,991 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,991 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,991 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,991 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,993 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,994 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,994 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,994 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,999 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,999 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,999 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:18,999 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:19,001 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:19,002 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:19,002 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:19,002 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 19:59:19,004 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-09 19:59:19,014 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-09 19:59:19,031 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 19:59:19,031 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 19:59:19,031 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 19:59:19,031 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 19:59:19,031 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 19:59:19,031 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 19:59:19,031 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 19:59:19,031 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 19:59:19,040 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-09 19:59:19,041 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 75 transitions, 165 flow [2020-12-09 19:59:19,043 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 75 transitions, 165 flow [2020-12-09 19:59:19,045 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 75 transitions, 165 flow [2020-12-09 19:59:19,085 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2020-12-09 19:59:19,085 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-09 19:59:19,089 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 49 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 19:59:19,092 INFO L116 LiptonReduction]: Number of co-enabled transitions 1296 [2020-12-09 19:59:20,850 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-12-09 19:59:21,053 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-12-09 19:59:21,113 INFO L131 LiptonReduction]: Checked pairs total: 2653 [2020-12-09 19:59:21,113 INFO L133 LiptonReduction]: Total number of compositions: 59 [2020-12-09 19:59:21,117 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 23 transitions, 61 flow [2020-12-09 19:59:21,135 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 362 states. [2020-12-09 19:59:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states. [2020-12-09 19:59:21,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 19:59:21,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:59:21,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:59:21,141 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:59:21,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:59:21,144 INFO L82 PathProgramCache]: Analyzing trace with hash -991402129, now seen corresponding path program 1 times [2020-12-09 19:59:21,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:59:21,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741414057] [2020-12-09 19:59:21,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:59:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:59:21,256 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 19:59:21,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741414057] [2020-12-09 19:59:21,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:59:21,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:59:21,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204803969] [2020-12-09 19:59:21,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 19:59:21,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:59:21,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 19:59:21,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 19:59:21,271 INFO L87 Difference]: Start difference. First operand 362 states. Second operand 2 states. [2020-12-09 19:59:21,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:59:21,293 INFO L93 Difference]: Finished difference Result 362 states and 1072 transitions. [2020-12-09 19:59:21,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 19:59:21,293 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-09 19:59:21,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:59:21,304 INFO L225 Difference]: With dead ends: 362 [2020-12-09 19:59:21,304 INFO L226 Difference]: Without dead ends: 298 [2020-12-09 19:59:21,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 19:59:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-12-09 19:59:21,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2020-12-09 19:59:21,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-12-09 19:59:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 864 transitions. [2020-12-09 19:59:21,352 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 864 transitions. Word has length 8 [2020-12-09 19:59:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:59:21,353 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 864 transitions. [2020-12-09 19:59:21,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 19:59:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 864 transitions. [2020-12-09 19:59:21,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 19:59:21,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:59:21,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:59:21,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 19:59:21,355 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:59:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:59:21,355 INFO L82 PathProgramCache]: Analyzing trace with hash -668714259, now seen corresponding path program 1 times [2020-12-09 19:59:21,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:59:21,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799873779] [2020-12-09 19:59:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:59:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:59:21,440 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 19:59:21,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799873779] [2020-12-09 19:59:21,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:59:21,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:59:21,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683738402] [2020-12-09 19:59:21,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 19:59:21,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:59:21,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 19:59:21,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 19:59:21,443 INFO L87 Difference]: Start difference. First operand 298 states and 864 transitions. Second operand 4 states. [2020-12-09 19:59:21,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:59:21,466 INFO L93 Difference]: Finished difference Result 330 states and 912 transitions. [2020-12-09 19:59:21,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 19:59:21,467 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 19:59:21,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:59:21,469 INFO L225 Difference]: With dead ends: 330 [2020-12-09 19:59:21,469 INFO L226 Difference]: Without dead ends: 266 [2020-12-09 19:59:21,470 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 19:59:21,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-09 19:59:21,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2020-12-09 19:59:21,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-12-09 19:59:21,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 752 transitions. [2020-12-09 19:59:21,485 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 752 transitions. Word has length 9 [2020-12-09 19:59:21,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:59:21,485 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 752 transitions. [2020-12-09 19:59:21,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 19:59:21,485 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 752 transitions. [2020-12-09 19:59:21,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 19:59:21,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:59:21,486 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:59:21,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 19:59:21,486 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:59:21,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:59:21,487 INFO L82 PathProgramCache]: Analyzing trace with hash 39953638, now seen corresponding path program 1 times [2020-12-09 19:59:21,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:59:21,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086251707] [2020-12-09 19:59:21,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:59:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:59:21,554 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 19:59:21,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086251707] [2020-12-09 19:59:21,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:59:21,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 19:59:21,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75279986] [2020-12-09 19:59:21,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 19:59:21,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:59:21,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 19:59:21,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:59:21,557 INFO L87 Difference]: Start difference. First operand 266 states and 752 transitions. Second operand 5 states. [2020-12-09 19:59:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:59:21,613 INFO L93 Difference]: Finished difference Result 414 states and 1086 transitions. [2020-12-09 19:59:21,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 19:59:21,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 19:59:21,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:59:21,616 INFO L225 Difference]: With dead ends: 414 [2020-12-09 19:59:21,616 INFO L226 Difference]: Without dead ends: 330 [2020-12-09 19:59:21,616 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 19:59:21,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-12-09 19:59:21,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 286. [2020-12-09 19:59:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-09 19:59:21,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 766 transitions. [2020-12-09 19:59:21,630 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 766 transitions. Word has length 10 [2020-12-09 19:59:21,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:59:21,630 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 766 transitions. [2020-12-09 19:59:21,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 19:59:21,630 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 766 transitions. [2020-12-09 19:59:21,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 19:59:21,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:59:21,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:59:21,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 19:59:21,632 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:59:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:59:21,632 INFO L82 PathProgramCache]: Analyzing trace with hash -259726332, now seen corresponding path program 1 times [2020-12-09 19:59:21,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:59:21,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499450284] [2020-12-09 19:59:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:59:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:59:21,697 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 19:59:21,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499450284] [2020-12-09 19:59:21,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:59:21,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 19:59:21,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544266394] [2020-12-09 19:59:21,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 19:59:21,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:59:21,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 19:59:21,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:59:21,698 INFO L87 Difference]: Start difference. First operand 286 states and 766 transitions. Second operand 5 states. [2020-12-09 19:59:21,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:59:21,734 INFO L93 Difference]: Finished difference Result 410 states and 1076 transitions. [2020-12-09 19:59:21,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 19:59:21,734 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 19:59:21,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:59:21,736 INFO L225 Difference]: With dead ends: 410 [2020-12-09 19:59:21,736 INFO L226 Difference]: Without dead ends: 220 [2020-12-09 19:59:21,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 19:59:21,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-12-09 19:59:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2020-12-09 19:59:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-12-09 19:59:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 576 transitions. [2020-12-09 19:59:21,747 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 576 transitions. Word has length 12 [2020-12-09 19:59:21,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:59:21,747 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 576 transitions. [2020-12-09 19:59:21,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 19:59:21,747 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 576 transitions. [2020-12-09 19:59:21,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 19:59:21,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:59:21,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:59:21,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 19:59:21,749 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:59:21,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:59:21,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1368326109, now seen corresponding path program 1 times [2020-12-09 19:59:21,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:59:21,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116486049] [2020-12-09 19:59:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:59:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:59:21,815 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 19:59:21,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116486049] [2020-12-09 19:59:21,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:59:21,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 19:59:21,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449427610] [2020-12-09 19:59:21,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 19:59:21,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:59:21,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 19:59:21,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:59:21,816 INFO L87 Difference]: Start difference. First operand 220 states and 576 transitions. Second operand 5 states. [2020-12-09 19:59:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:59:21,853 INFO L93 Difference]: Finished difference Result 288 states and 714 transitions. [2020-12-09 19:59:21,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 19:59:21,853 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 19:59:21,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:59:21,855 INFO L225 Difference]: With dead ends: 288 [2020-12-09 19:59:21,855 INFO L226 Difference]: Without dead ends: 212 [2020-12-09 19:59:21,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 19:59:21,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-09 19:59:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 176. [2020-12-09 19:59:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-09 19:59:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 440 transitions. [2020-12-09 19:59:21,860 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 440 transitions. Word has length 12 [2020-12-09 19:59:21,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:59:21,860 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 440 transitions. [2020-12-09 19:59:21,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 19:59:21,860 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 440 transitions. [2020-12-09 19:59:21,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 19:59:21,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:59:21,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:59:21,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 19:59:21,861 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:59:21,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:59:21,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1622661680, now seen corresponding path program 2 times [2020-12-09 19:59:21,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:59:21,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010647578] [2020-12-09 19:59:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:59:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:59:21,918 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 19:59:21,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010647578] [2020-12-09 19:59:21,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:59:21,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 19:59:21,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424589368] [2020-12-09 19:59:21,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 19:59:21,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:59:21,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 19:59:21,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:59:21,919 INFO L87 Difference]: Start difference. First operand 176 states and 440 transitions. Second operand 5 states. [2020-12-09 19:59:21,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:59:21,949 INFO L93 Difference]: Finished difference Result 224 states and 550 transitions. [2020-12-09 19:59:21,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 19:59:21,950 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 19:59:21,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:59:21,951 INFO L225 Difference]: With dead ends: 224 [2020-12-09 19:59:21,951 INFO L226 Difference]: Without dead ends: 116 [2020-12-09 19:59:21,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 19:59:21,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-09 19:59:21,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-12-09 19:59:21,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-09 19:59:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 278 transitions. [2020-12-09 19:59:21,956 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 278 transitions. Word has length 12 [2020-12-09 19:59:21,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:59:21,956 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 278 transitions. [2020-12-09 19:59:21,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 19:59:21,956 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 278 transitions. [2020-12-09 19:59:21,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 19:59:21,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:59:21,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:59:21,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 19:59:21,957 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:59:21,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:59:21,957 INFO L82 PathProgramCache]: Analyzing trace with hash -701864959, now seen corresponding path program 1 times [2020-12-09 19:59:21,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:59:21,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457927161] [2020-12-09 19:59:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:59:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:59:22,014 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 19:59:22,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457927161] [2020-12-09 19:59:22,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:59:22,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 19:59:22,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772786925] [2020-12-09 19:59:22,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 19:59:22,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:59:22,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 19:59:22,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 19:59:22,016 INFO L87 Difference]: Start difference. First operand 116 states and 278 transitions. Second operand 6 states. [2020-12-09 19:59:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:59:22,048 INFO L93 Difference]: Finished difference Result 152 states and 362 transitions. [2020-12-09 19:59:22,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 19:59:22,049 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-09 19:59:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:59:22,049 INFO L225 Difference]: With dead ends: 152 [2020-12-09 19:59:22,049 INFO L226 Difference]: Without dead ends: 80 [2020-12-09 19:59:22,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-09 19:59:22,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-09 19:59:22,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-09 19:59:22,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-09 19:59:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 176 transitions. [2020-12-09 19:59:22,052 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 176 transitions. Word has length 14 [2020-12-09 19:59:22,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:59:22,052 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 176 transitions. [2020-12-09 19:59:22,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 19:59:22,052 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 176 transitions. [2020-12-09 19:59:22,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 19:59:22,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:59:22,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:59:22,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 19:59:22,052 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:59:22,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:59:22,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2064800307, now seen corresponding path program 2 times [2020-12-09 19:59:22,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:59:22,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967707794] [2020-12-09 19:59:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:59:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:59:22,086 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 19:59:22,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967707794] [2020-12-09 19:59:22,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:59:22,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 19:59:22,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778306574] [2020-12-09 19:59:22,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 19:59:22,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:59:22,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 19:59:22,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 19:59:22,087 INFO L87 Difference]: Start difference. First operand 80 states and 176 transitions. Second operand 4 states. [2020-12-09 19:59:22,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:59:22,106 INFO L93 Difference]: Finished difference Result 91 states and 181 transitions. [2020-12-09 19:59:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 19:59:22,107 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-09 19:59:22,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:59:22,107 INFO L225 Difference]: With dead ends: 91 [2020-12-09 19:59:22,107 INFO L226 Difference]: Without dead ends: 69 [2020-12-09 19:59:22,108 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 19:59:22,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-09 19:59:22,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-12-09 19:59:22,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-09 19:59:22,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 138 transitions. [2020-12-09 19:59:22,109 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 138 transitions. Word has length 14 [2020-12-09 19:59:22,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:59:22,110 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 138 transitions. [2020-12-09 19:59:22,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 19:59:22,110 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 138 transitions. [2020-12-09 19:59:22,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 19:59:22,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:59:22,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:59:22,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 19:59:22,110 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:59:22,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:59:22,110 INFO L82 PathProgramCache]: Analyzing trace with hash 182443752, now seen corresponding path program 1 times [2020-12-09 19:59:22,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:59:22,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190086002] [2020-12-09 19:59:22,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:59:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:59:22,144 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 19:59:22,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190086002] [2020-12-09 19:59:22,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:59:22,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 19:59:22,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55099612] [2020-12-09 19:59:22,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 19:59:22,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:59:22,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 19:59:22,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:59:22,145 INFO L87 Difference]: Start difference. First operand 69 states and 138 transitions. Second operand 5 states. [2020-12-09 19:59:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:59:22,178 INFO L93 Difference]: Finished difference Result 65 states and 113 transitions. [2020-12-09 19:59:22,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 19:59:22,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-09 19:59:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:59:22,179 INFO L225 Difference]: With dead ends: 65 [2020-12-09 19:59:22,179 INFO L226 Difference]: Without dead ends: 50 [2020-12-09 19:59:22,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 19:59:22,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-09 19:59:22,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-09 19:59:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-09 19:59:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 83 transitions. [2020-12-09 19:59:22,182 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 83 transitions. Word has length 15 [2020-12-09 19:59:22,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:59:22,182 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 83 transitions. [2020-12-09 19:59:22,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 19:59:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 83 transitions. [2020-12-09 19:59:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 19:59:22,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:59:22,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:59:22,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 19:59:22,183 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:59:22,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:59:22,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1015325315, now seen corresponding path program 1 times [2020-12-09 19:59:22,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:59:22,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695524487] [2020-12-09 19:59:22,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:59:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:59:22,226 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 19:59:22,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695524487] [2020-12-09 19:59:22,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:59:22,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 19:59:22,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644507403] [2020-12-09 19:59:22,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 19:59:22,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:59:22,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 19:59:22,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 19:59:22,228 INFO L87 Difference]: Start difference. First operand 50 states and 83 transitions. Second operand 6 states. [2020-12-09 19:59:22,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:59:22,257 INFO L93 Difference]: Finished difference Result 43 states and 67 transitions. [2020-12-09 19:59:22,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 19:59:22,258 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-09 19:59:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:59:22,258 INFO L225 Difference]: With dead ends: 43 [2020-12-09 19:59:22,258 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 19:59:22,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-09 19:59:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 19:59:22,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-09 19:59:22,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-09 19:59:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 57 transitions. [2020-12-09 19:59:22,259 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 57 transitions. Word has length 16 [2020-12-09 19:59:22,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:59:22,260 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 57 transitions. [2020-12-09 19:59:22,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 19:59:22,260 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 57 transitions. [2020-12-09 19:59:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 19:59:22,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:59:22,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:59:22,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 19:59:22,260 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:59:22,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:59:22,260 INFO L82 PathProgramCache]: Analyzing trace with hash 719368643, now seen corresponding path program 1 times [2020-12-09 19:59:22,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:59:22,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733713526] [2020-12-09 19:59:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:59:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:59:22,301 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 19:59:22,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733713526] [2020-12-09 19:59:22,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:59:22,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 19:59:22,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843837577] [2020-12-09 19:59:22,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 19:59:22,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:59:22,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 19:59:22,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:59:22,302 INFO L87 Difference]: Start difference. First operand 37 states and 57 transitions. Second operand 5 states. [2020-12-09 19:59:22,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:59:22,321 INFO L93 Difference]: Finished difference Result 36 states and 56 transitions. [2020-12-09 19:59:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 19:59:22,321 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-09 19:59:22,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:59:22,321 INFO L225 Difference]: With dead ends: 36 [2020-12-09 19:59:22,321 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 19:59:22,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 19:59:22,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 19:59:22,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 19:59:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 19:59:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 19:59:22,322 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-12-09 19:59:22,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:59:22,322 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 19:59:22,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 19:59:22,322 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 19:59:22,322 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 19:59:22,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 19:59:22,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:59:22 BasicIcfg [2020-12-09 19:59:22,324 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 19:59:22,325 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 19:59:22,325 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 19:59:22,325 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 19:59:22,325 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:59:18" (3/4) ... [2020-12-09 19:59:22,327 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 19:59:22,332 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-12-09 19:59:22,332 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-12-09 19:59:22,332 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-12-09 19:59:22,335 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-12-09 19:59:22,335 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 19:59:22,335 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 19:59:22,335 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 19:59:22,361 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_fe308f05-99e9-4194-9072-443651b65422/bin/utaipan/witness.graphml [2020-12-09 19:59:22,361 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 19:59:22,362 INFO L168 Benchmark]: Toolchain (without parser) took 4202.15 ms. Allocated memory was 117.4 MB in the beginning and 165.7 MB in the end (delta: 48.2 MB). Free memory was 86.8 MB in the beginning and 102.4 MB in the end (delta: -15.6 MB). Peak memory consumption was 32.8 MB. Max. memory is 16.1 GB. [2020-12-09 19:59:22,362 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 117.4 MB. Free memory is still 93.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:59:22,363 INFO L168 Benchmark]: CACSL2BoogieTranslator took 430.77 ms. Allocated memory is still 117.4 MB. Free memory was 86.6 MB in the beginning and 80.9 MB in the end (delta: 5.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.1 GB. [2020-12-09 19:59:22,363 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.99 ms. Allocated memory is still 117.4 MB. Free memory was 80.9 MB in the beginning and 79.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:59:22,364 INFO L168 Benchmark]: Boogie Preprocessor took 18.81 ms. Allocated memory is still 117.4 MB. Free memory was 79.0 MB in the beginning and 77.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:59:22,364 INFO L168 Benchmark]: RCFGBuilder took 301.53 ms. Allocated memory is still 117.4 MB. Free memory was 77.6 MB in the beginning and 55.2 MB in the end (delta: 22.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:59:22,364 INFO L168 Benchmark]: TraceAbstraction took 3379.82 ms. Allocated memory was 117.4 MB in the beginning and 165.7 MB in the end (delta: 48.2 MB). Free memory was 54.6 MB in the beginning and 105.5 MB in the end (delta: -50.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:59:22,365 INFO L168 Benchmark]: Witness Printer took 36.63 ms. Allocated memory is still 165.7 MB. Free memory was 105.5 MB in the beginning and 102.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:59:22,367 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 117.4 MB. Free memory is still 93.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 430.77 ms. Allocated memory is still 117.4 MB. Free memory was 86.6 MB in the beginning and 80.9 MB in the end (delta: 5.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.99 ms. Allocated memory is still 117.4 MB. Free memory was 80.9 MB in the beginning and 79.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.81 ms. Allocated memory is still 117.4 MB. Free memory was 79.0 MB in the beginning and 77.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 301.53 ms. Allocated memory is still 117.4 MB. Free memory was 77.6 MB in the beginning and 55.2 MB in the end (delta: 22.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3379.82 ms. Allocated memory was 117.4 MB in the beginning and 165.7 MB in the end (delta: 48.2 MB). Free memory was 54.6 MB in the beginning and 105.5 MB in the end (delta: -50.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 36.63 ms. Allocated memory is still 165.7 MB. Free memory was 105.5 MB in the beginning and 102.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 722 VarBasedMoverChecksPositive, 36 VarBasedMoverChecksNegative, 6 SemBasedMoverChecksPositive, 30 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 54 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.0s, 83 PlacesBefore, 32 PlacesAfterwards, 75 TransitionsBefore, 23 TransitionsAfterwards, 1296 CoEnabledTransitionPairs, 6 FixpointIterations, 18 TrivialSequentialCompositions, 38 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 59 TotalNumberOfCompositions, 2653 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: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 243 SDtfs, 230 SDslu, 383 SDs, 0 SdLazy, 192 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=362occurred 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, 80 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 140 NumberOfCodeBlocks, 140 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 129 ConstructedInterpolants, 0 QuantifiedInterpolants, 6931 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...