./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe018_pso.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_ec3afb16-db9b-4ca6-901f-36fec4420dae/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ec3afb16-db9b-4ca6-901f-36fec4420dae/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ec3afb16-db9b-4ca6-901f-36fec4420dae/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ec3afb16-db9b-4ca6-901f-36fec4420dae/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe018_pso.opt.i -s /tmp/vcloud-vcloud-master/worker/run_dir_ec3afb16-db9b-4ca6-901f-36fec4420dae/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ec3afb16-db9b-4ca6-901f-36fec4420dae/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 da07e8179710920ae52eed2d5bbb89ee6bc979e4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 18:58:38,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 18:58:38,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 18:58:38,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 18:58:38,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 18:58:38,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 18:58:38,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 18:58:38,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 18:58:38,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 18:58:38,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 18:58:38,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 18:58:38,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 18:58:38,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 18:58:38,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 18:58:38,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 18:58:38,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 18:58:38,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 18:58:38,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 18:58:38,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 18:58:38,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 18:58:38,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 18:58:38,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 18:58:38,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 18:58:38,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 18:58:38,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 18:58:38,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 18:58:38,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 18:58:38,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 18:58:38,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 18:58:38,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 18:58:38,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 18:58:38,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 18:58:38,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 18:58:38,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 18:58:38,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 18:58:38,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 18:58:38,884 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 18:58:38,884 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 18:58:38,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 18:58:38,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 18:58:38,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 18:58:38,887 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ec3afb16-db9b-4ca6-901f-36fec4420dae/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 18:58:38,909 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 18:58:38,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 18:58:38,910 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 18:58:38,910 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 18:58:38,911 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 18:58:38,911 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 18:58:38,911 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 18:58:38,911 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 18:58:38,911 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 18:58:38,911 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 18:58:38,912 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 18:58:38,912 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 18:58:38,912 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 18:58:38,912 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 18:58:38,912 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 18:58:38,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 18:58:38,913 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 18:58:38,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 18:58:38,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 18:58:38,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 18:58:38,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 18:58:38,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 18:58:38,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 18:58:38,914 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 18:58:38,915 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 18:58:38,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 18:58:38,915 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 18:58:38,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 18:58:38,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 18:58:38,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 18:58:38,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:58:38,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 18:58:38,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 18:58:38,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 18:58:38,916 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 18:58:38,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 18:58:38,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 18:58:38,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 18:58:38,917 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 18:58:38,917 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_ec3afb16-db9b-4ca6-901f-36fec4420dae/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ec3afb16-db9b-4ca6-901f-36fec4420dae/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da07e8179710920ae52eed2d5bbb89ee6bc979e4 [2020-12-09 18:58:39,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 18:58:39,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 18:58:39,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 18:58:39,099 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 18:58:39,100 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 18:58:39,101 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ec3afb16-db9b-4ca6-901f-36fec4420dae/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/safe018_pso.opt.i [2020-12-09 18:58:39,140 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ec3afb16-db9b-4ca6-901f-36fec4420dae/bin/utaipan/data/50ac7ecd0/204574fdf7344189b38a76076e8549d3/FLAG11e6f173f [2020-12-09 18:58:39,563 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 18:58:39,564 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ec3afb16-db9b-4ca6-901f-36fec4420dae/sv-benchmarks/c/pthread-wmm/safe018_pso.opt.i [2020-12-09 18:58:39,577 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ec3afb16-db9b-4ca6-901f-36fec4420dae/bin/utaipan/data/50ac7ecd0/204574fdf7344189b38a76076e8549d3/FLAG11e6f173f [2020-12-09 18:58:39,587 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ec3afb16-db9b-4ca6-901f-36fec4420dae/bin/utaipan/data/50ac7ecd0/204574fdf7344189b38a76076e8549d3 [2020-12-09 18:58:39,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 18:58:39,590 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 18:58:39,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 18:58:39,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 18:58:39,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 18:58:39,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:58:39" (1/1) ... [2020-12-09 18:58:39,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@324b5bab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:58:39, skipping insertion in model container [2020-12-09 18:58:39,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:58:39" (1/1) ... [2020-12-09 18:58:39,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 18:58:39,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 18:58:39,745 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_ec3afb16-db9b-4ca6-901f-36fec4420dae/sv-benchmarks/c/pthread-wmm/safe018_pso.opt.i[949,962] [2020-12-09 18:58:39,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:58:39,868 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 18:58:39,877 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_ec3afb16-db9b-4ca6-901f-36fec4420dae/sv-benchmarks/c/pthread-wmm/safe018_pso.opt.i[949,962] [2020-12-09 18:58:39,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:58:39,971 INFO L208 MainTranslator]: Completed translation [2020-12-09 18:58:39,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:58:39 WrapperNode [2020-12-09 18:58:39,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 18:58:39,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 18:58:39,973 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 18:58:39,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 18:58:39,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:58:39" (1/1) ... [2020-12-09 18:58:39,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:58:39" (1/1) ... [2020-12-09 18:58:40,013 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 18:58:40,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 18:58:40,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 18:58:40,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 18:58:40,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:58:39" (1/1) ... [2020-12-09 18:58:40,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:58:39" (1/1) ... [2020-12-09 18:58:40,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:58:39" (1/1) ... [2020-12-09 18:58:40,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:58:39" (1/1) ... [2020-12-09 18:58:40,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:58:39" (1/1) ... [2020-12-09 18:58:40,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:58:39" (1/1) ... [2020-12-09 18:58:40,035 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:58:39" (1/1) ... [2020-12-09 18:58:40,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 18:58:40,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 18:58:40,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 18:58:40,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 18:58:40,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:58:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec3afb16-db9b-4ca6-901f-36fec4420dae/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 18:58:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 18:58:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-09 18:58:40,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 18:58:40,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 18:58:40,105 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-12-09 18:58:40,105 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-12-09 18:58:40,105 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-12-09 18:58:40,105 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-12-09 18:58:40,105 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-12-09 18:58:40,105 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-12-09 18:58:40,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 18:58:40,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-09 18:58:40,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 18:58:40,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 18:58:40,108 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 18:58:40,334 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 18:58:40,334 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 18:58:40,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:58:40 BoogieIcfgContainer [2020-12-09 18:58:40,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 18:58:40,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 18:58:40,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 18:58:40,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 18:58:40,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:58:39" (1/3) ... [2020-12-09 18:58:40,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729e31f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:58:40, skipping insertion in model container [2020-12-09 18:58:40,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:58:39" (2/3) ... [2020-12-09 18:58:40,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729e31f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:58:40, skipping insertion in model container [2020-12-09 18:58:40,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:58:40" (3/3) ... [2020-12-09 18:58:40,341 INFO L111 eAbstractionObserver]: Analyzing ICFG safe018_pso.opt.i [2020-12-09 18:58:40,351 WARN L169 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-09 18:58:40,351 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 18:58:40,353 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 18:58:40,354 INFO L354 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-09 18:58:40,375 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,375 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,375 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,375 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,376 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,376 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,376 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,376 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,377 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,377 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,377 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,377 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,378 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,378 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,378 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,378 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,378 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,379 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,379 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,379 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,379 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,379 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,380 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,380 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,380 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,380 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,380 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,380 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,381 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,381 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,381 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,381 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,382 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,382 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,382 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,382 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,384 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,385 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,385 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,385 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,389 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,390 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,390 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,390 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,392 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,392 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,393 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,393 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 18:58:40,394 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-09 18:58:40,402 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-09 18:58:40,419 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 18:58:40,419 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 18:58:40,419 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 18:58:40,419 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 18:58:40,419 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 18:58:40,419 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 18:58:40,419 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 18:58:40,420 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 18:58:40,429 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-09 18:58:40,430 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 74 transitions, 163 flow [2020-12-09 18:58:40,433 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 74 transitions, 163 flow [2020-12-09 18:58:40,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 74 transitions, 163 flow [2020-12-09 18:58:40,474 INFO L129 PetriNetUnfolder]: 2/71 cut-off events. [2020-12-09 18:58:40,474 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-09 18:58:40,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 71 events. 2/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2020-12-09 18:58:40,480 INFO L116 LiptonReduction]: Number of co-enabled transitions 1212 [2020-12-09 18:58:42,147 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-12-09 18:58:42,352 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-12-09 18:58:42,415 INFO L131 LiptonReduction]: Checked pairs total: 2020 [2020-12-09 18:58:42,415 INFO L133 LiptonReduction]: Total number of compositions: 61 [2020-12-09 18:58:42,419 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 22 transitions, 59 flow [2020-12-09 18:58:42,435 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 274 states. [2020-12-09 18:58:42,436 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states. [2020-12-09 18:58:42,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 18:58:42,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:58:42,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:58:42,441 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:58:42,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:58:42,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1647941983, now seen corresponding path program 1 times [2020-12-09 18:58:42,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:58:42,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164313439] [2020-12-09 18:58:42,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:58:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:58:42,561 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 18:58:42,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164313439] [2020-12-09 18:58:42,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:58:42,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:58:42,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287942361] [2020-12-09 18:58:42,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 18:58:42,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:58:42,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 18:58:42,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 18:58:42,575 INFO L87 Difference]: Start difference. First operand 274 states. Second operand 2 states. [2020-12-09 18:58:42,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:58:42,594 INFO L93 Difference]: Finished difference Result 274 states and 786 transitions. [2020-12-09 18:58:42,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 18:58:42,595 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-09 18:58:42,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:58:42,604 INFO L225 Difference]: With dead ends: 274 [2020-12-09 18:58:42,604 INFO L226 Difference]: Without dead ends: 226 [2020-12-09 18:58:42,605 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 18:58:42,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-09 18:58:42,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-12-09 18:58:42,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-09 18:58:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 634 transitions. [2020-12-09 18:58:42,647 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 634 transitions. Word has length 8 [2020-12-09 18:58:42,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:58:42,648 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 634 transitions. [2020-12-09 18:58:42,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 18:58:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 634 transitions. [2020-12-09 18:58:42,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 18:58:42,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:58:42,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:58:42,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 18:58:42,649 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:58:42,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:58:42,650 INFO L82 PathProgramCache]: Analyzing trace with hash -453422130, now seen corresponding path program 1 times [2020-12-09 18:58:42,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:58:42,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098114599] [2020-12-09 18:58:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:58:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:58:42,737 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 18:58:42,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098114599] [2020-12-09 18:58:42,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:58:42,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:58:42,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558085965] [2020-12-09 18:58:42,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:58:42,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:58:42,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:58:42,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:58:42,739 INFO L87 Difference]: Start difference. First operand 226 states and 634 transitions. Second operand 4 states. [2020-12-09 18:58:42,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:58:42,765 INFO L93 Difference]: Finished difference Result 268 states and 719 transitions. [2020-12-09 18:58:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 18:58:42,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 18:58:42,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:58:42,768 INFO L225 Difference]: With dead ends: 268 [2020-12-09 18:58:42,768 INFO L226 Difference]: Without dead ends: 220 [2020-12-09 18:58:42,768 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 18:58:42,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-12-09 18:58:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2020-12-09 18:58:42,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-12-09 18:58:42,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 612 transitions. [2020-12-09 18:58:42,784 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 612 transitions. Word has length 9 [2020-12-09 18:58:42,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:58:42,784 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 612 transitions. [2020-12-09 18:58:42,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:58:42,785 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 612 transitions. [2020-12-09 18:58:42,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 18:58:42,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:58:42,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:58:42,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 18:58:42,786 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:58:42,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:58:42,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1814079141, now seen corresponding path program 1 times [2020-12-09 18:58:42,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:58:42,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626551256] [2020-12-09 18:58:42,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:58:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:58:42,846 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 18:58:42,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626551256] [2020-12-09 18:58:42,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:58:42,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:58:42,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310839289] [2020-12-09 18:58:42,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 18:58:42,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:58:42,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 18:58:42,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:58:42,848 INFO L87 Difference]: Start difference. First operand 220 states and 612 transitions. Second operand 5 states. [2020-12-09 18:58:42,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:58:42,899 INFO L93 Difference]: Finished difference Result 295 states and 800 transitions. [2020-12-09 18:58:42,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 18:58:42,900 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 18:58:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:58:42,903 INFO L225 Difference]: With dead ends: 295 [2020-12-09 18:58:42,903 INFO L226 Difference]: Without dead ends: 250 [2020-12-09 18:58:42,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-09 18:58:42,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-09 18:58:42,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 232. [2020-12-09 18:58:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-09 18:58:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 641 transitions. [2020-12-09 18:58:42,922 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 641 transitions. Word has length 10 [2020-12-09 18:58:42,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:58:42,922 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 641 transitions. [2020-12-09 18:58:42,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 18:58:42,923 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 641 transitions. [2020-12-09 18:58:42,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 18:58:42,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:58:42,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:58:42,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 18:58:42,925 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:58:42,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:58:42,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1172176569, now seen corresponding path program 1 times [2020-12-09 18:58:42,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:58:42,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169448823] [2020-12-09 18:58:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:58:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:58:42,994 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 18:58:42,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169448823] [2020-12-09 18:58:42,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:58:42,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:58:42,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250480320] [2020-12-09 18:58:42,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 18:58:42,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:58:42,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 18:58:42,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:58:42,997 INFO L87 Difference]: Start difference. First operand 232 states and 641 transitions. Second operand 5 states. [2020-12-09 18:58:43,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:58:43,017 INFO L93 Difference]: Finished difference Result 250 states and 665 transitions. [2020-12-09 18:58:43,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 18:58:43,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 18:58:43,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:58:43,019 INFO L225 Difference]: With dead ends: 250 [2020-12-09 18:58:43,020 INFO L226 Difference]: Without dead ends: 214 [2020-12-09 18:58:43,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 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 18:58:43,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-09 18:58:43,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-12-09 18:58:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-12-09 18:58:43,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 581 transitions. [2020-12-09 18:58:43,031 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 581 transitions. Word has length 10 [2020-12-09 18:58:43,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:58:43,031 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 581 transitions. [2020-12-09 18:58:43,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 18:58:43,032 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 581 transitions. [2020-12-09 18:58:43,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 18:58:43,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:58:43,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:58:43,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 18:58:43,034 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:58:43,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:58:43,034 INFO L82 PathProgramCache]: Analyzing trace with hash 329174463, now seen corresponding path program 1 times [2020-12-09 18:58:43,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:58:43,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356418432] [2020-12-09 18:58:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:58:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:58:43,082 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 18:58:43,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356418432] [2020-12-09 18:58:43,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:58:43,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:58:43,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323641388] [2020-12-09 18:58:43,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 18:58:43,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:58:43,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 18:58:43,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:58:43,084 INFO L87 Difference]: Start difference. First operand 214 states and 581 transitions. Second operand 5 states. [2020-12-09 18:58:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:58:43,102 INFO L93 Difference]: Finished difference Result 226 states and 595 transitions. [2020-12-09 18:58:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 18:58:43,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 18:58:43,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:58:43,104 INFO L225 Difference]: With dead ends: 226 [2020-12-09 18:58:43,104 INFO L226 Difference]: Without dead ends: 202 [2020-12-09 18:58:43,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 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 18:58:43,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-09 18:58:43,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-12-09 18:58:43,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-09 18:58:43,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 543 transitions. [2020-12-09 18:58:43,110 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 543 transitions. Word has length 11 [2020-12-09 18:58:43,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:58:43,110 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 543 transitions. [2020-12-09 18:58:43,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 18:58:43,111 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 543 transitions. [2020-12-09 18:58:43,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 18:58:43,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:58:43,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:58:43,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 18:58:43,112 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:58:43,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:58:43,112 INFO L82 PathProgramCache]: Analyzing trace with hash 400886096, now seen corresponding path program 1 times [2020-12-09 18:58:43,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:58:43,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155899666] [2020-12-09 18:58:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:58:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:58:43,153 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 18:58:43,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155899666] [2020-12-09 18:58:43,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:58:43,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:58:43,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088103517] [2020-12-09 18:58:43,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 18:58:43,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:58:43,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 18:58:43,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:58:43,154 INFO L87 Difference]: Start difference. First operand 202 states and 543 transitions. Second operand 6 states. [2020-12-09 18:58:43,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:58:43,183 INFO L93 Difference]: Finished difference Result 247 states and 648 transitions. [2020-12-09 18:58:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 18:58:43,183 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-09 18:58:43,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:58:43,184 INFO L225 Difference]: With dead ends: 247 [2020-12-09 18:58:43,184 INFO L226 Difference]: Without dead ends: 106 [2020-12-09 18:58:43,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-09 18:58:43,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-09 18:58:43,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-12-09 18:58:43,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-09 18:58:43,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 258 transitions. [2020-12-09 18:58:43,187 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 258 transitions. Word has length 11 [2020-12-09 18:58:43,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:58:43,188 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 258 transitions. [2020-12-09 18:58:43,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 18:58:43,188 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 258 transitions. [2020-12-09 18:58:43,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 18:58:43,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:58:43,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:58:43,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 18:58:43,189 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:58:43,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:58:43,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1225814647, now seen corresponding path program 1 times [2020-12-09 18:58:43,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:58:43,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248449715] [2020-12-09 18:58:43,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:58:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:58:43,230 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 18:58:43,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248449715] [2020-12-09 18:58:43,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:58:43,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:58:43,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652052134] [2020-12-09 18:58:43,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 18:58:43,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:58:43,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 18:58:43,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:58:43,231 INFO L87 Difference]: Start difference. First operand 106 states and 258 transitions. Second operand 5 states. [2020-12-09 18:58:43,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:58:43,262 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-12-09 18:58:43,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 18:58:43,263 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 18:58:43,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:58:43,263 INFO L225 Difference]: With dead ends: 148 [2020-12-09 18:58:43,263 INFO L226 Difference]: Without dead ends: 76 [2020-12-09 18:58:43,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 18:58:43,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-09 18:58:43,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-12-09 18:58:43,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-09 18:58:43,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 169 transitions. [2020-12-09 18:58:43,266 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 169 transitions. Word has length 12 [2020-12-09 18:58:43,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:58:43,266 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 169 transitions. [2020-12-09 18:58:43,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 18:58:43,266 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 169 transitions. [2020-12-09 18:58:43,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 18:58:43,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:58:43,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:58:43,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 18:58:43,267 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:58:43,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:58:43,267 INFO L82 PathProgramCache]: Analyzing trace with hash 532831146, now seen corresponding path program 1 times [2020-12-09 18:58:43,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:58:43,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137486166] [2020-12-09 18:58:43,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:58:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:58:43,311 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 18:58:43,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137486166] [2020-12-09 18:58:43,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:58:43,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:58:43,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037159719] [2020-12-09 18:58:43,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:58:43,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:58:43,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:58:43,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:58:43,313 INFO L87 Difference]: Start difference. First operand 76 states and 169 transitions. Second operand 4 states. [2020-12-09 18:58:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:58:43,331 INFO L93 Difference]: Finished difference Result 87 states and 174 transitions. [2020-12-09 18:58:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 18:58:43,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-09 18:58:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:58:43,332 INFO L225 Difference]: With dead ends: 87 [2020-12-09 18:58:43,332 INFO L226 Difference]: Without dead ends: 66 [2020-12-09 18:58:43,332 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 18:58:43,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-09 18:58:43,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-09 18:58:43,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-09 18:58:43,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 133 transitions. [2020-12-09 18:58:43,339 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 133 transitions. Word has length 13 [2020-12-09 18:58:43,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:58:43,339 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 133 transitions. [2020-12-09 18:58:43,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:58:43,339 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 133 transitions. [2020-12-09 18:58:43,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 18:58:43,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:58:43,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:58:43,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 18:58:43,340 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:58:43,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:58:43,340 INFO L82 PathProgramCache]: Analyzing trace with hash -206155871, now seen corresponding path program 1 times [2020-12-09 18:58:43,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:58:43,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566244213] [2020-12-09 18:58:43,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:58:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:58:43,375 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 18:58:43,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566244213] [2020-12-09 18:58:43,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:58:43,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:58:43,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840892938] [2020-12-09 18:58:43,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 18:58:43,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:58:43,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 18:58:43,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:58:43,377 INFO L87 Difference]: Start difference. First operand 66 states and 133 transitions. Second operand 5 states. [2020-12-09 18:58:43,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:58:43,404 INFO L93 Difference]: Finished difference Result 62 states and 108 transitions. [2020-12-09 18:58:43,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 18:58:43,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-09 18:58:43,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:58:43,405 INFO L225 Difference]: With dead ends: 62 [2020-12-09 18:58:43,405 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 18:58:43,405 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 18:58:43,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 18:58:43,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-09 18:58:43,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-09 18:58:43,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 78 transitions. [2020-12-09 18:58:43,406 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 78 transitions. Word has length 14 [2020-12-09 18:58:43,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:58:43,407 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 78 transitions. [2020-12-09 18:58:43,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 18:58:43,407 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 78 transitions. [2020-12-09 18:58:43,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 18:58:43,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:58:43,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:58:43,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 18:58:43,407 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:58:43,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:58:43,408 INFO L82 PathProgramCache]: Analyzing trace with hash -2107760638, now seen corresponding path program 1 times [2020-12-09 18:58:43,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:58:43,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191895233] [2020-12-09 18:58:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:58:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:58:43,442 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 18:58:43,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191895233] [2020-12-09 18:58:43,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:58:43,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 18:58:43,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844230164] [2020-12-09 18:58:43,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 18:58:43,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:58:43,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 18:58:43,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:58:43,443 INFO L87 Difference]: Start difference. First operand 47 states and 78 transitions. Second operand 6 states. [2020-12-09 18:58:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:58:43,477 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2020-12-09 18:58:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 18:58:43,478 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-09 18:58:43,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:58:43,478 INFO L225 Difference]: With dead ends: 40 [2020-12-09 18:58:43,478 INFO L226 Difference]: Without dead ends: 34 [2020-12-09 18:58:43,478 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 18:58:43,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-09 18:58:43,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-09 18:58:43,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 18:58:43,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 52 transitions. [2020-12-09 18:58:43,479 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 52 transitions. Word has length 15 [2020-12-09 18:58:43,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:58:43,480 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 52 transitions. [2020-12-09 18:58:43,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 18:58:43,480 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 52 transitions. [2020-12-09 18:58:43,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 18:58:43,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:58:43,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:58:43,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 18:58:43,480 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:58:43,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:58:43,481 INFO L82 PathProgramCache]: Analyzing trace with hash 202243322, now seen corresponding path program 1 times [2020-12-09 18:58:43,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:58:43,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525946517] [2020-12-09 18:58:43,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:58:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:58:43,520 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 18:58:43,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525946517] [2020-12-09 18:58:43,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:58:43,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 18:58:43,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899368476] [2020-12-09 18:58:43,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 18:58:43,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:58:43,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 18:58:43,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:58:43,523 INFO L87 Difference]: Start difference. First operand 34 states and 52 transitions. Second operand 5 states. [2020-12-09 18:58:43,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:58:43,548 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2020-12-09 18:58:43,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 18:58:43,548 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-09 18:58:43,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:58:43,548 INFO L225 Difference]: With dead ends: 33 [2020-12-09 18:58:43,549 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 18:58:43,549 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 18:58:43,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 18:58:43,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 18:58:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 18:58:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 18:58:43,550 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-12-09 18:58:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:58:43,550 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 18:58:43,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 18:58:43,550 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 18:58:43,550 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 18:58:43,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 18:58:43,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:58:43 BasicIcfg [2020-12-09 18:58:43,553 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 18:58:43,553 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 18:58:43,554 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 18:58:43,554 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 18:58:43,554 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:58:40" (3/4) ... [2020-12-09 18:58:43,557 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 18:58:43,563 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-12-09 18:58:43,563 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-12-09 18:58:43,563 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-12-09 18:58:43,567 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-12-09 18:58:43,567 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 18:58:43,568 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 18:58:43,568 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 18:58:43,603 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ec3afb16-db9b-4ca6-901f-36fec4420dae/bin/utaipan/witness.graphml [2020-12-09 18:58:43,603 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 18:58:43,604 INFO L168 Benchmark]: Toolchain (without parser) took 4013.49 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 76.4 MB in the beginning and 94.8 MB in the end (delta: -18.5 MB). Peak memory consumption was 2.7 MB. Max. memory is 16.1 GB. [2020-12-09 18:58:43,604 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 71.3 MB. Free memory was 37.9 MB in the beginning and 37.8 MB in the end (delta: 78.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:58:43,605 INFO L168 Benchmark]: CACSL2BoogieTranslator took 380.86 ms. Allocated memory is still 107.0 MB. Free memory was 76.2 MB in the beginning and 75.6 MB in the end (delta: 599.9 kB). Peak memory consumption was 26.0 MB. Max. memory is 16.1 GB. [2020-12-09 18:58:43,605 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.45 ms. Allocated memory is still 107.0 MB. Free memory was 75.6 MB in the beginning and 73.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:58:43,606 INFO L168 Benchmark]: Boogie Preprocessor took 24.57 ms. Allocated memory is still 107.0 MB. Free memory was 73.8 MB in the beginning and 72.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:58:43,606 INFO L168 Benchmark]: RCFGBuilder took 296.72 ms. Allocated memory is still 107.0 MB. Free memory was 72.2 MB in the beginning and 50.5 MB in the end (delta: 21.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 18:58:43,607 INFO L168 Benchmark]: TraceAbstraction took 3216.36 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 50.0 MB in the beginning and 98.0 MB in the end (delta: -47.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:58:43,607 INFO L168 Benchmark]: Witness Printer took 49.46 ms. Allocated memory is still 130.0 MB. Free memory was 98.0 MB in the beginning and 94.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:58:43,610 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 71.3 MB. Free memory was 37.9 MB in the beginning and 37.8 MB in the end (delta: 78.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 380.86 ms. Allocated memory is still 107.0 MB. Free memory was 76.2 MB in the beginning and 75.6 MB in the end (delta: 599.9 kB). Peak memory consumption was 26.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.45 ms. Allocated memory is still 107.0 MB. Free memory was 75.6 MB in the beginning and 73.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.57 ms. Allocated memory is still 107.0 MB. Free memory was 73.8 MB in the beginning and 72.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 296.72 ms. Allocated memory is still 107.0 MB. Free memory was 72.2 MB in the beginning and 50.5 MB in the end (delta: 21.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3216.36 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 50.0 MB in the beginning and 98.0 MB in the end (delta: -47.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 49.46 ms. Allocated memory is still 130.0 MB. Free memory was 98.0 MB in the beginning and 94.8 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 758 VarBasedMoverChecksPositive, 36 VarBasedMoverChecksNegative, 12 SemBasedMoverChecksPositive, 24 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 53 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.9s, 82 PlacesBefore, 31 PlacesAfterwards, 74 TransitionsBefore, 22 TransitionsAfterwards, 1212 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 1 ChoiceCompositions, 61 TotalNumberOfCompositions, 2020 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, 73 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.1s, OverallIterations: 11, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 220 SDtfs, 244 SDslu, 367 SDs, 0 SdLazy, 167 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=274occurred 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, 18 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 130 NumberOfCodeBlocks, 130 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 119 ConstructedInterpolants, 0 QuantifiedInterpolants, 6005 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...