./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label29.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_56c4ccbe-abbc-409b-8cbf-f859fac4163b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_56c4ccbe-abbc-409b-8cbf-f859fac4163b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_56c4ccbe-abbc-409b-8cbf-f859fac4163b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_56c4ccbe-abbc-409b-8cbf-f859fac4163b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label29.c -s /tmp/vcloud-vcloud-master/worker/run_dir_56c4ccbe-abbc-409b-8cbf-f859fac4163b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_56c4ccbe-abbc-409b-8cbf-f859fac4163b/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 4a846042d2e3a90f9afd312e363335049aaf47f7 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 18:20:44,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 18:20:44,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 18:20:44,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 18:20:44,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 18:20:44,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 18:20:44,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 18:20:44,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 18:20:44,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 18:20:44,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 18:20:44,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 18:20:44,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 18:20:44,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 18:20:44,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 18:20:44,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 18:20:44,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 18:20:44,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 18:20:44,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 18:20:44,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 18:20:44,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 18:20:44,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 18:20:44,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 18:20:44,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 18:20:44,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 18:20:44,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 18:20:44,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 18:20:44,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 18:20:44,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 18:20:44,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 18:20:44,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 18:20:44,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 18:20:44,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 18:20:44,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 18:20:44,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 18:20:44,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 18:20:44,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 18:20:44,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 18:20:44,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 18:20:44,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 18:20:44,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 18:20:44,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 18:20:44,859 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_56c4ccbe-abbc-409b-8cbf-f859fac4163b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 18:20:44,880 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 18:20:44,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 18:20:44,881 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 18:20:44,881 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 18:20:44,882 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 18:20:44,882 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 18:20:44,882 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 18:20:44,882 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 18:20:44,882 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 18:20:44,882 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 18:20:44,883 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 18:20:44,883 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 18:20:44,883 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 18:20:44,883 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 18:20:44,883 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 18:20:44,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 18:20:44,884 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 18:20:44,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 18:20:44,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 18:20:44,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 18:20:44,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 18:20:44,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 18:20:44,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 18:20:44,885 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 18:20:44,886 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 18:20:44,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 18:20:44,886 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 18:20:44,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 18:20:44,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 18:20:44,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 18:20:44,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:20:44,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 18:20:44,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 18:20:44,887 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 18:20:44,887 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 18:20:44,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 18:20:44,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 18:20:44,888 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 18:20:44,888 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 18:20:44,888 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_56c4ccbe-abbc-409b-8cbf-f859fac4163b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_56c4ccbe-abbc-409b-8cbf-f859fac4163b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a846042d2e3a90f9afd312e363335049aaf47f7 [2020-12-09 18:20:45,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 18:20:45,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 18:20:45,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 18:20:45,095 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 18:20:45,096 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 18:20:45,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_56c4ccbe-abbc-409b-8cbf-f859fac4163b/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label29.c [2020-12-09 18:20:45,137 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_56c4ccbe-abbc-409b-8cbf-f859fac4163b/bin/utaipan/data/cf4c52cdc/07272a6f38704311984783ea85ac9fe4/FLAG1d15f3bb1 [2020-12-09 18:20:45,568 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 18:20:45,569 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_56c4ccbe-abbc-409b-8cbf-f859fac4163b/sv-benchmarks/c/eca-rers2012/Problem01_label29.c [2020-12-09 18:20:45,577 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_56c4ccbe-abbc-409b-8cbf-f859fac4163b/bin/utaipan/data/cf4c52cdc/07272a6f38704311984783ea85ac9fe4/FLAG1d15f3bb1 [2020-12-09 18:20:45,913 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_56c4ccbe-abbc-409b-8cbf-f859fac4163b/bin/utaipan/data/cf4c52cdc/07272a6f38704311984783ea85ac9fe4 [2020-12-09 18:20:45,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 18:20:45,917 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 18:20:45,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 18:20:45,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 18:20:45,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 18:20:45,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:20:45" (1/1) ... [2020-12-09 18:20:45,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63f43888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:20:45, skipping insertion in model container [2020-12-09 18:20:45,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:20:45" (1/1) ... [2020-12-09 18:20:45,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 18:20:46,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 18:20:46,270 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_56c4ccbe-abbc-409b-8cbf-f859fac4163b/sv-benchmarks/c/eca-rers2012/Problem01_label29.c[18109,18122] [2020-12-09 18:20:46,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:20:46,301 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 18:20:46,358 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_56c4ccbe-abbc-409b-8cbf-f859fac4163b/sv-benchmarks/c/eca-rers2012/Problem01_label29.c[18109,18122] [2020-12-09 18:20:46,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:20:46,380 INFO L208 MainTranslator]: Completed translation [2020-12-09 18:20:46,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:20:46 WrapperNode [2020-12-09 18:20:46,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 18:20:46,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 18:20:46,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 18:20:46,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 18:20:46,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:20:46" (1/1) ... [2020-12-09 18:20:46,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:20:46" (1/1) ... [2020-12-09 18:20:46,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 18:20:46,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 18:20:46,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 18:20:46,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 18:20:46,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:20:46" (1/1) ... [2020-12-09 18:20:46,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:20:46" (1/1) ... [2020-12-09 18:20:46,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:20:46" (1/1) ... [2020-12-09 18:20:46,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:20:46" (1/1) ... [2020-12-09 18:20:46,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:20:46" (1/1) ... [2020-12-09 18:20:46,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:20:46" (1/1) ... [2020-12-09 18:20:46,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:20:46" (1/1) ... [2020-12-09 18:20:46,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 18:20:46,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 18:20:46,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 18:20:46,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 18:20:46,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:20:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_56c4ccbe-abbc-409b-8cbf-f859fac4163b/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 18:20:46,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 18:20:46,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 18:20:46,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 18:20:46,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 18:20:47,755 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 18:20:47,755 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 18:20:47,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:20:47 BoogieIcfgContainer [2020-12-09 18:20:47,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 18:20:47,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 18:20:47,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 18:20:47,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 18:20:47,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:20:45" (1/3) ... [2020-12-09 18:20:47,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f448f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:20:47, skipping insertion in model container [2020-12-09 18:20:47,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:20:46" (2/3) ... [2020-12-09 18:20:47,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f448f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:20:47, skipping insertion in model container [2020-12-09 18:20:47,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:20:47" (3/3) ... [2020-12-09 18:20:47,763 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label29.c [2020-12-09 18:20:47,773 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 18:20:47,775 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 18:20:47,783 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 18:20:47,799 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 18:20:47,800 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 18:20:47,800 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 18:20:47,800 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 18:20:47,800 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 18:20:47,800 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 18:20:47,800 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 18:20:47,809 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 18:20:47,820 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-12-09 18:20:47,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-09 18:20:47,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:20:47,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:20:47,826 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:20:47,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:20:47,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1806911832, now seen corresponding path program 1 times [2020-12-09 18:20:47,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:20:47,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193176494] [2020-12-09 18:20:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:20:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:20:48,079 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 18:20:48,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193176494] [2020-12-09 18:20:48,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:20:48,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:20:48,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394305698] [2020-12-09 18:20:48,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:20:48,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:20:48,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:20:48,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:20:48,094 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-12-09 18:20:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:20:48,413 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-12-09 18:20:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:20:48,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-09 18:20:48,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:20:48,426 INFO L225 Difference]: With dead ends: 224 [2020-12-09 18:20:48,426 INFO L226 Difference]: Without dead ends: 145 [2020-12-09 18:20:48,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:20:48,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-09 18:20:48,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-12-09 18:20:48,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-09 18:20:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 265 transitions. [2020-12-09 18:20:48,476 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 265 transitions. Word has length 71 [2020-12-09 18:20:48,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:20:48,477 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 265 transitions. [2020-12-09 18:20:48,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:20:48,477 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 265 transitions. [2020-12-09 18:20:48,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-09 18:20:48,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:20:48,481 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:20:48,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 18:20:48,481 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:20:48,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:20:48,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1034856325, now seen corresponding path program 1 times [2020-12-09 18:20:48,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:20:48,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025823871] [2020-12-09 18:20:48,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:20:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:20:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:20:48,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025823871] [2020-12-09 18:20:48,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:20:48,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:20:48,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68359626] [2020-12-09 18:20:48,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:20:48,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:20:48,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:20:48,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:20:48,542 INFO L87 Difference]: Start difference. First operand 145 states and 265 transitions. Second operand 3 states. [2020-12-09 18:20:48,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:20:48,795 INFO L93 Difference]: Finished difference Result 431 states and 792 transitions. [2020-12-09 18:20:48,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:20:48,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-09 18:20:48,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:20:48,798 INFO L225 Difference]: With dead ends: 431 [2020-12-09 18:20:48,798 INFO L226 Difference]: Without dead ends: 287 [2020-12-09 18:20:48,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:20:48,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-12-09 18:20:48,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-12-09 18:20:48,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-09 18:20:48,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 485 transitions. [2020-12-09 18:20:48,814 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 485 transitions. Word has length 77 [2020-12-09 18:20:48,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:20:48,815 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 485 transitions. [2020-12-09 18:20:48,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:20:48,815 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 485 transitions. [2020-12-09 18:20:48,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-09 18:20:48,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:20:48,817 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:20:48,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 18:20:48,817 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:20:48,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:20:48,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1786342678, now seen corresponding path program 1 times [2020-12-09 18:20:48,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:20:48,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371010748] [2020-12-09 18:20:48,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:20:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:20:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:20:48,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371010748] [2020-12-09 18:20:48,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:20:48,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:20:48,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232894039] [2020-12-09 18:20:48,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:20:48,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:20:48,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:20:48,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:20:48,869 INFO L87 Difference]: Start difference. First operand 287 states and 485 transitions. Second operand 3 states. [2020-12-09 18:20:49,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:20:49,115 INFO L93 Difference]: Finished difference Result 857 states and 1452 transitions. [2020-12-09 18:20:49,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:20:49,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2020-12-09 18:20:49,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:20:49,118 INFO L225 Difference]: With dead ends: 857 [2020-12-09 18:20:49,118 INFO L226 Difference]: Without dead ends: 571 [2020-12-09 18:20:49,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:20:49,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-12-09 18:20:49,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2020-12-09 18:20:49,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-12-09 18:20:49,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 896 transitions. [2020-12-09 18:20:49,142 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 896 transitions. Word has length 92 [2020-12-09 18:20:49,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:20:49,142 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 896 transitions. [2020-12-09 18:20:49,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:20:49,142 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 896 transitions. [2020-12-09 18:20:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-09 18:20:49,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:20:49,145 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:20:49,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 18:20:49,146 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:20:49,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:20:49,146 INFO L82 PathProgramCache]: Analyzing trace with hash 943738123, now seen corresponding path program 1 times [2020-12-09 18:20:49,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:20:49,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922825711] [2020-12-09 18:20:49,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:20:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:20:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 18:20:49,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922825711] [2020-12-09 18:20:49,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:20:49,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:20:49,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696577696] [2020-12-09 18:20:49,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:20:49,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:20:49,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:20:49,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:20:49,201 INFO L87 Difference]: Start difference. First operand 571 states and 896 transitions. Second operand 3 states. [2020-12-09 18:20:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:20:49,450 INFO L93 Difference]: Finished difference Result 1567 states and 2465 transitions. [2020-12-09 18:20:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:20:49,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-09 18:20:49,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:20:49,456 INFO L225 Difference]: With dead ends: 1567 [2020-12-09 18:20:49,456 INFO L226 Difference]: Without dead ends: 997 [2020-12-09 18:20:49,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:20:49,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-12-09 18:20:49,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 784. [2020-12-09 18:20:49,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-12-09 18:20:49,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1219 transitions. [2020-12-09 18:20:49,484 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1219 transitions. Word has length 97 [2020-12-09 18:20:49,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:20:49,484 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 1219 transitions. [2020-12-09 18:20:49,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:20:49,484 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1219 transitions. [2020-12-09 18:20:49,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-09 18:20:49,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:20:49,487 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:20:49,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 18:20:49,487 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:20:49,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:20:49,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1642081061, now seen corresponding path program 1 times [2020-12-09 18:20:49,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:20:49,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175308215] [2020-12-09 18:20:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:20:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:20:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:20:49,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175308215] [2020-12-09 18:20:49,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:20:49,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:20:49,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853123419] [2020-12-09 18:20:49,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:20:49,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:20:49,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:20:49,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:20:49,558 INFO L87 Difference]: Start difference. First operand 784 states and 1219 transitions. Second operand 4 states. [2020-12-09 18:20:49,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:20:49,949 INFO L93 Difference]: Finished difference Result 1780 states and 2740 transitions. [2020-12-09 18:20:49,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:20:49,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-12-09 18:20:49,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:20:49,955 INFO L225 Difference]: With dead ends: 1780 [2020-12-09 18:20:49,955 INFO L226 Difference]: Without dead ends: 997 [2020-12-09 18:20:49,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:20:49,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-12-09 18:20:49,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 855. [2020-12-09 18:20:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855 states. [2020-12-09 18:20:49,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1260 transitions. [2020-12-09 18:20:49,980 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1260 transitions. Word has length 99 [2020-12-09 18:20:49,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:20:49,980 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 1260 transitions. [2020-12-09 18:20:49,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:20:49,981 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1260 transitions. [2020-12-09 18:20:49,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-09 18:20:49,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:20:49,983 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:20:49,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 18:20:49,984 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:20:49,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:20:49,984 INFO L82 PathProgramCache]: Analyzing trace with hash -801258238, now seen corresponding path program 1 times [2020-12-09 18:20:49,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:20:49,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095375845] [2020-12-09 18:20:49,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:20:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:20:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:20:50,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095375845] [2020-12-09 18:20:50,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:20:50,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:20:50,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349128820] [2020-12-09 18:20:50,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:20:50,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:20:50,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:20:50,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:20:50,047 INFO L87 Difference]: Start difference. First operand 855 states and 1260 transitions. Second operand 3 states. [2020-12-09 18:20:50,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:20:50,268 INFO L93 Difference]: Finished difference Result 1851 states and 2715 transitions. [2020-12-09 18:20:50,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:20:50,268 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-09 18:20:50,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:20:50,272 INFO L225 Difference]: With dead ends: 1851 [2020-12-09 18:20:50,273 INFO L226 Difference]: Without dead ends: 997 [2020-12-09 18:20:50,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:20:50,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-12-09 18:20:50,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2020-12-09 18:20:50,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-12-09 18:20:50,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1426 transitions. [2020-12-09 18:20:50,289 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1426 transitions. Word has length 100 [2020-12-09 18:20:50,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:20:50,290 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1426 transitions. [2020-12-09 18:20:50,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:20:50,290 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1426 transitions. [2020-12-09 18:20:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-09 18:20:50,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:20:50,292 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:20:50,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 18:20:50,292 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:20:50,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:20:50,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1714457361, now seen corresponding path program 1 times [2020-12-09 18:20:50,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:20:50,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356384855] [2020-12-09 18:20:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:20:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:20:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-09 18:20:50,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356384855] [2020-12-09 18:20:50,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:20:50,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:20:50,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416760262] [2020-12-09 18:20:50,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:20:50,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:20:50,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:20:50,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:20:50,323 INFO L87 Difference]: Start difference. First operand 997 states and 1426 transitions. Second operand 3 states. [2020-12-09 18:20:50,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:20:50,555 INFO L93 Difference]: Finished difference Result 2206 states and 3160 transitions. [2020-12-09 18:20:50,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:20:50,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2020-12-09 18:20:50,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:20:50,560 INFO L225 Difference]: With dead ends: 2206 [2020-12-09 18:20:50,560 INFO L226 Difference]: Without dead ends: 1210 [2020-12-09 18:20:50,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:20:50,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-12-09 18:20:50,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 997. [2020-12-09 18:20:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-12-09 18:20:50,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1274 transitions. [2020-12-09 18:20:50,584 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1274 transitions. Word has length 103 [2020-12-09 18:20:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:20:50,584 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1274 transitions. [2020-12-09 18:20:50,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:20:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1274 transitions. [2020-12-09 18:20:50,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-09 18:20:50,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:20:50,586 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:20:50,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 18:20:50,586 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:20:50,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:20:50,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1486863798, now seen corresponding path program 1 times [2020-12-09 18:20:50,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:20:50,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75978763] [2020-12-09 18:20:50,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:20:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:20:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:20:50,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75978763] [2020-12-09 18:20:50,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:20:50,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:20:50,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427017191] [2020-12-09 18:20:50,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:20:50,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:20:50,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:20:50,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:20:50,639 INFO L87 Difference]: Start difference. First operand 997 states and 1274 transitions. Second operand 4 states. [2020-12-09 18:20:50,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:20:50,902 INFO L93 Difference]: Finished difference Result 1993 states and 2547 transitions. [2020-12-09 18:20:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:20:50,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 104 [2020-12-09 18:20:50,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:20:50,906 INFO L225 Difference]: With dead ends: 1993 [2020-12-09 18:20:50,906 INFO L226 Difference]: Without dead ends: 997 [2020-12-09 18:20:50,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:20:50,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-12-09 18:20:50,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2020-12-09 18:20:50,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-12-09 18:20:50,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1260 transitions. [2020-12-09 18:20:50,927 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1260 transitions. Word has length 104 [2020-12-09 18:20:50,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:20:50,927 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1260 transitions. [2020-12-09 18:20:50,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:20:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1260 transitions. [2020-12-09 18:20:50,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-09 18:20:50,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:20:50,930 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:20:50,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 18:20:50,930 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:20:50,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:20:50,931 INFO L82 PathProgramCache]: Analyzing trace with hash -100061657, now seen corresponding path program 1 times [2020-12-09 18:20:50,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:20:50,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923498096] [2020-12-09 18:20:50,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:20:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:20:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-09 18:20:50,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923498096] [2020-12-09 18:20:50,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:20:50,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:20:50,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366261099] [2020-12-09 18:20:50,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:20:50,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:20:50,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:20:50,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:20:50,964 INFO L87 Difference]: Start difference. First operand 997 states and 1260 transitions. Second operand 3 states. [2020-12-09 18:20:51,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:20:51,169 INFO L93 Difference]: Finished difference Result 2277 states and 2843 transitions. [2020-12-09 18:20:51,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:20:51,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-09 18:20:51,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:20:51,173 INFO L225 Difference]: With dead ends: 2277 [2020-12-09 18:20:51,173 INFO L226 Difference]: Without dead ends: 1281 [2020-12-09 18:20:51,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:20:51,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-12-09 18:20:51,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1139. [2020-12-09 18:20:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-12-09 18:20:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1427 transitions. [2020-12-09 18:20:51,190 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1427 transitions. Word has length 106 [2020-12-09 18:20:51,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:20:51,190 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1427 transitions. [2020-12-09 18:20:51,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:20:51,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1427 transitions. [2020-12-09 18:20:51,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-09 18:20:51,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:20:51,192 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:20:51,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 18:20:51,192 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:20:51,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:20:51,193 INFO L82 PathProgramCache]: Analyzing trace with hash -646394756, now seen corresponding path program 1 times [2020-12-09 18:20:51,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:20:51,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136404273] [2020-12-09 18:20:51,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:20:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:20:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-09 18:20:51,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136404273] [2020-12-09 18:20:51,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:20:51,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:20:51,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967229694] [2020-12-09 18:20:51,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:20:51,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:20:51,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:20:51,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:20:51,271 INFO L87 Difference]: Start difference. First operand 1139 states and 1427 transitions. Second operand 3 states. [2020-12-09 18:20:51,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:20:51,497 INFO L93 Difference]: Finished difference Result 2632 states and 3345 transitions. [2020-12-09 18:20:51,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:20:51,497 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2020-12-09 18:20:51,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:20:51,502 INFO L225 Difference]: With dead ends: 2632 [2020-12-09 18:20:51,503 INFO L226 Difference]: Without dead ends: 1494 [2020-12-09 18:20:51,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:20:51,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2020-12-09 18:20:51,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1210. [2020-12-09 18:20:51,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-12-09 18:20:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1523 transitions. [2020-12-09 18:20:51,525 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1523 transitions. Word has length 137 [2020-12-09 18:20:51,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:20:51,525 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1523 transitions. [2020-12-09 18:20:51,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:20:51,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1523 transitions. [2020-12-09 18:20:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-09 18:20:51,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:20:51,528 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:20:51,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 18:20:51,528 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:20:51,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:20:51,528 INFO L82 PathProgramCache]: Analyzing trace with hash -2126446442, now seen corresponding path program 1 times [2020-12-09 18:20:51,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:20:51,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759192021] [2020-12-09 18:20:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:20:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:20:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-09 18:20:51,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759192021] [2020-12-09 18:20:51,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:20:51,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:20:51,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820021736] [2020-12-09 18:20:51,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:20:51,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:20:51,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:20:51,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:20:51,608 INFO L87 Difference]: Start difference. First operand 1210 states and 1523 transitions. Second operand 3 states. [2020-12-09 18:20:51,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:20:51,801 INFO L93 Difference]: Finished difference Result 2632 states and 3289 transitions. [2020-12-09 18:20:51,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:20:51,802 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2020-12-09 18:20:51,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:20:51,808 INFO L225 Difference]: With dead ends: 2632 [2020-12-09 18:20:51,808 INFO L226 Difference]: Without dead ends: 1423 [2020-12-09 18:20:51,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:20:51,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2020-12-09 18:20:51,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1281. [2020-12-09 18:20:51,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-12-09 18:20:51,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1600 transitions. [2020-12-09 18:20:51,836 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1600 transitions. Word has length 153 [2020-12-09 18:20:51,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:20:51,836 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1600 transitions. [2020-12-09 18:20:51,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:20:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1600 transitions. [2020-12-09 18:20:51,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-12-09 18:20:51,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:20:51,847 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:20:51,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 18:20:51,847 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:20:51,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:20:51,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1638898435, now seen corresponding path program 1 times [2020-12-09 18:20:51,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:20:51,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053857516] [2020-12-09 18:20:51,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:20:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:20:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 185 proven. 88 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-09 18:20:52,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053857516] [2020-12-09 18:20:52,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775357968] [2020-12-09 18:20:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_56c4ccbe-abbc-409b-8cbf-f859fac4163b/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:20:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:20:52,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 18:20:52,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:20:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-12-09 18:20:52,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:20:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-12-09 18:20:52,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 18:20:52,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-12-09 18:20:52,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71176629] [2020-12-09 18:20:52,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:20:52,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:20:52,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:20:52,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-09 18:20:52,541 INFO L87 Difference]: Start difference. First operand 1281 states and 1600 transitions. Second operand 3 states. [2020-12-09 18:20:52,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:20:52,751 INFO L93 Difference]: Finished difference Result 2561 states and 3199 transitions. [2020-12-09 18:20:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:20:52,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 218 [2020-12-09 18:20:52,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:20:52,757 INFO L225 Difference]: With dead ends: 2561 [2020-12-09 18:20:52,758 INFO L226 Difference]: Without dead ends: 1281 [2020-12-09 18:20:52,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-09 18:20:52,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-12-09 18:20:52,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1139. [2020-12-09 18:20:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-12-09 18:20:52,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1352 transitions. [2020-12-09 18:20:52,784 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1352 transitions. Word has length 218 [2020-12-09 18:20:52,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:20:52,784 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1352 transitions. [2020-12-09 18:20:52,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:20:52,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1352 transitions. [2020-12-09 18:20:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-09 18:20:52,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:20:52,786 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:20:52,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-09 18:20:52,987 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:20:52,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:20:52,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1337022527, now seen corresponding path program 1 times [2020-12-09 18:20:52,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:20:52,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936995662] [2020-12-09 18:20:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:20:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:20:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-09 18:20:53,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936995662] [2020-12-09 18:20:53,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446712500] [2020-12-09 18:20:53,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_56c4ccbe-abbc-409b-8cbf-f859fac4163b/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:20:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:20:53,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 18:20:53,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:20:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-12-09 18:20:53,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:20:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-12-09 18:20:53,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 18:20:53,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-12-09 18:20:53,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712811986] [2020-12-09 18:20:53,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:20:53,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:20:53,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:20:53,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:20:53,537 INFO L87 Difference]: Start difference. First operand 1139 states and 1352 transitions. Second operand 3 states. [2020-12-09 18:20:53,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:20:53,704 INFO L93 Difference]: Finished difference Result 2490 states and 2957 transitions. [2020-12-09 18:20:53,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:20:53,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 242 [2020-12-09 18:20:53,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:20:53,709 INFO L225 Difference]: With dead ends: 2490 [2020-12-09 18:20:53,709 INFO L226 Difference]: Without dead ends: 1352 [2020-12-09 18:20:53,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 483 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:20:53,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-12-09 18:20:53,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1210. [2020-12-09 18:20:53,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-12-09 18:20:53,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1426 transitions. [2020-12-09 18:20:53,726 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1426 transitions. Word has length 242 [2020-12-09 18:20:53,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:20:53,726 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1426 transitions. [2020-12-09 18:20:53,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:20:53,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1426 transitions. [2020-12-09 18:20:53,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-12-09 18:20:53,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:20:53,729 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:20:53,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-09 18:20:53,930 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:20:53,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:20:53,931 INFO L82 PathProgramCache]: Analyzing trace with hash -859661985, now seen corresponding path program 1 times [2020-12-09 18:20:53,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:20:53,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752099265] [2020-12-09 18:20:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:20:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:20:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 236 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:20:54,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752099265] [2020-12-09 18:20:54,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329838817] [2020-12-09 18:20:54,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_56c4ccbe-abbc-409b-8cbf-f859fac4163b/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:20:54,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:20:54,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 18:20:54,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:20:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 272 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-12-09 18:20:54,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:20:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 272 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-12-09 18:20:54,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 18:20:54,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2020-12-09 18:20:54,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760894371] [2020-12-09 18:20:54,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:20:54,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:20:54,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:20:54,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-09 18:20:54,792 INFO L87 Difference]: Start difference. First operand 1210 states and 1426 transitions. Second operand 3 states. [2020-12-09 18:20:54,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:20:54,976 INFO L93 Difference]: Finished difference Result 2772 states and 3240 transitions. [2020-12-09 18:20:54,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:20:54,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 282 [2020-12-09 18:20:54,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:20:54,977 INFO L225 Difference]: With dead ends: 2772 [2020-12-09 18:20:54,977 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 18:20:54,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 561 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-09 18:20:54,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 18:20:54,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 18:20:54,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 18:20:54,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 18:20:54,979 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 282 [2020-12-09 18:20:54,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:20:54,979 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 18:20:54,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:20:54,979 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 18:20:54,979 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 18:20:55,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-09 18:20:55,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 18:20:55,452 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-12-09 18:20:55,627 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-12-09 18:20:55,630 INFO L262 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-12-09 18:20:55,630 INFO L262 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-12-09 18:20:55,630 INFO L262 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-12-09 18:20:55,630 INFO L262 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-12-09 18:20:55,630 INFO L262 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-12-09 18:20:55,630 INFO L262 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-12-09 18:20:55,630 INFO L262 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-12-09 18:20:55,630 INFO L262 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-12-09 18:20:55,630 INFO L262 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-12-09 18:20:55,630 INFO L262 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-12-09 18:20:55,630 INFO L262 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-12-09 18:20:55,630 INFO L262 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-12-09 18:20:55,630 INFO L262 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-12-09 18:20:55,630 INFO L262 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-12-09 18:20:55,630 INFO L262 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-12-09 18:20:55,631 INFO L262 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-12-09 18:20:55,631 INFO L262 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-12-09 18:20:55,631 INFO L262 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-12-09 18:20:55,631 INFO L262 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-12-09 18:20:55,631 INFO L262 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-12-09 18:20:55,631 INFO L262 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-12-09 18:20:55,631 INFO L262 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-12-09 18:20:55,631 INFO L262 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-12-09 18:20:55,631 INFO L262 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-12-09 18:20:55,631 INFO L262 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-12-09 18:20:55,631 INFO L262 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-12-09 18:20:55,631 INFO L262 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-12-09 18:20:55,631 INFO L262 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-12-09 18:20:55,631 INFO L262 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-12-09 18:20:55,631 INFO L262 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-12-09 18:20:55,631 INFO L262 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-12-09 18:20:55,631 INFO L262 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-12-09 18:20:55,632 INFO L262 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-12-09 18:20:55,632 INFO L262 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-12-09 18:20:55,632 INFO L262 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-12-09 18:20:55,632 INFO L262 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-12-09 18:20:55,632 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 18:20:55,632 INFO L262 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-12-09 18:20:55,632 INFO L262 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-12-09 18:20:55,632 INFO L262 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-12-09 18:20:55,632 INFO L258 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse3 (= ~a17~0 1)) (.cse9 (= ~a20~0 1))) (let ((.cse4 (<= ~a8~0 14)) (.cse8 (<= ~a16~0 4)) (.cse5 (<= ~a16~0 5)) (.cse1 (not (= ~a7~0 1))) (.cse7 (<= 15 ~a8~0)) (.cse0 (= ~a21~0 1)) (.cse6 (<= ~a17~0 0)) (.cse2 (or (and .cse9 .cse3) (and .cse9 (<= 5 ~a16~0))))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse5 (<= ~a21~0 0) .cse2 .cse3) (and .cse4 .cse6 .cse2) (and .cse6 .cse1 .cse7) (and .cse4 .cse8 .cse3) (and .cse0 .cse8 .cse9 .cse3) (and .cse5 .cse6) (and .cse1 .cse7 .cse3) (and .cse0 .cse6 .cse2)))) [2020-12-09 18:20:55,632 INFO L262 CegarLoopResult]: For program point L485-1(lines 40 585) no Hoare annotation was computed. [2020-12-09 18:20:55,632 INFO L262 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-12-09 18:20:55,633 INFO L262 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-12-09 18:20:55,633 INFO L262 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-12-09 18:20:55,633 INFO L262 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-12-09 18:20:55,633 INFO L262 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-12-09 18:20:55,633 INFO L262 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-12-09 18:20:55,633 INFO L262 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-12-09 18:20:55,633 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 18:20:55,633 INFO L262 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-12-09 18:20:55,633 INFO L265 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-12-09 18:20:55,633 INFO L262 CegarLoopResult]: For program point L488-1(lines 40 585) no Hoare annotation was computed. [2020-12-09 18:20:55,633 INFO L262 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-12-09 18:20:55,633 INFO L262 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-12-09 18:20:55,633 INFO L262 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-12-09 18:20:55,633 INFO L262 CegarLoopResult]: For program point L489(line 489) no Hoare annotation was computed. [2020-12-09 18:20:55,633 INFO L262 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-12-09 18:20:55,633 INFO L262 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-12-09 18:20:55,633 INFO L262 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-12-09 18:20:55,633 INFO L262 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-12-09 18:20:55,634 INFO L262 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-12-09 18:20:55,634 INFO L262 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-12-09 18:20:55,634 INFO L262 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-12-09 18:20:55,634 INFO L262 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-12-09 18:20:55,634 INFO L262 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-12-09 18:20:55,634 INFO L262 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-12-09 18:20:55,634 INFO L258 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse3 (= ~a17~0 1)) (.cse9 (= ~a20~0 1))) (let ((.cse4 (<= ~a8~0 14)) (.cse8 (<= ~a16~0 4)) (.cse5 (<= ~a16~0 5)) (.cse1 (not (= ~a7~0 1))) (.cse7 (<= 15 ~a8~0)) (.cse0 (= ~a21~0 1)) (.cse6 (<= ~a17~0 0)) (.cse2 (or (and .cse9 .cse3) (and .cse9 (<= 5 ~a16~0))))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse5 (<= ~a21~0 0) .cse2 .cse3) (and .cse4 .cse6 .cse2) (and .cse6 .cse1 .cse7) (and .cse4 .cse8 .cse3) (and .cse0 .cse8 .cse9 .cse3) (and .cse5 .cse6) (and .cse1 .cse7 .cse3) (and .cse0 .cse6 .cse2)))) [2020-12-09 18:20:55,634 INFO L262 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-12-09 18:20:55,634 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 489) no Hoare annotation was computed. [2020-12-09 18:20:55,634 INFO L262 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-12-09 18:20:55,634 INFO L262 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-12-09 18:20:55,634 INFO L262 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-12-09 18:20:55,634 INFO L262 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-12-09 18:20:55,634 INFO L262 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-12-09 18:20:55,634 INFO L262 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-12-09 18:20:55,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:20:55 BoogieIcfgContainer [2020-12-09 18:20:55,653 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 18:20:55,653 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 18:20:55,653 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 18:20:55,653 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 18:20:55,654 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:20:47" (3/4) ... [2020-12-09 18:20:55,657 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 18:20:55,677 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2020-12-09 18:20:55,679 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-12-09 18:20:55,681 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-12-09 18:20:55,682 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-09 18:20:55,763 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_56c4ccbe-abbc-409b-8cbf-f859fac4163b/bin/utaipan/witness.graphml [2020-12-09 18:20:55,763 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 18:20:55,764 INFO L168 Benchmark]: Toolchain (without parser) took 9846.55 ms. Allocated memory was 113.2 MB in the beginning and 343.9 MB in the end (delta: 230.7 MB). Free memory was 87.8 MB in the beginning and 185.7 MB in the end (delta: -98.0 MB). Peak memory consumption was 132.8 MB. Max. memory is 16.1 GB. [2020-12-09 18:20:55,764 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 67.1 MB. Free memory is still 41.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:20:55,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 462.37 ms. Allocated memory is still 113.2 MB. Free memory was 87.8 MB in the beginning and 61.1 MB in the end (delta: 26.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-12-09 18:20:55,764 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.46 ms. Allocated memory is still 113.2 MB. Free memory was 61.1 MB in the beginning and 87.1 MB in the end (delta: -26.0 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:20:55,765 INFO L168 Benchmark]: Boogie Preprocessor took 44.75 ms. Allocated memory is still 113.2 MB. Free memory was 87.1 MB in the beginning and 82.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 18:20:55,765 INFO L168 Benchmark]: RCFGBuilder took 1270.07 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 82.1 MB in the beginning and 44.5 MB in the end (delta: 37.6 MB). Peak memory consumption was 66.7 MB. Max. memory is 16.1 GB. [2020-12-09 18:20:55,765 INFO L168 Benchmark]: TraceAbstraction took 7894.36 ms. Allocated memory was 136.3 MB in the beginning and 343.9 MB in the end (delta: 207.6 MB). Free memory was 44.5 MB in the beginning and 201.5 MB in the end (delta: -157.0 MB). Peak memory consumption was 49.6 MB. Max. memory is 16.1 GB. [2020-12-09 18:20:55,765 INFO L168 Benchmark]: Witness Printer took 109.82 ms. Allocated memory is still 343.9 MB. Free memory was 201.5 MB in the beginning and 185.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-09 18:20:55,767 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 67.1 MB. Free memory is still 41.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 462.37 ms. Allocated memory is still 113.2 MB. Free memory was 87.8 MB in the beginning and 61.1 MB in the end (delta: 26.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.46 ms. Allocated memory is still 113.2 MB. Free memory was 61.1 MB in the beginning and 87.1 MB in the end (delta: -26.0 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.75 ms. Allocated memory is still 113.2 MB. Free memory was 87.1 MB in the beginning and 82.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1270.07 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 82.1 MB in the beginning and 44.5 MB in the end (delta: 37.6 MB). Peak memory consumption was 66.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7894.36 ms. Allocated memory was 136.3 MB in the beginning and 343.9 MB in the end (delta: 207.6 MB). Free memory was 44.5 MB in the beginning and 201.5 MB in the end (delta: -157.0 MB). Peak memory consumption was 49.6 MB. Max. memory is 16.1 GB. * Witness Printer took 109.82 ms. Allocated memory is still 343.9 MB. Free memory was 201.5 MB in the beginning and 185.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 489]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((a21 == 1 && !(a7 == 1)) && ((a20 == 1 && a17 == 1) || (a20 == 1 && 5 <= a16))) && a17 == 1) || ((((a8 <= 14 && a16 <= 5) && a21 <= 0) && ((a20 == 1 && a17 == 1) || (a20 == 1 && 5 <= a16))) && a17 == 1)) || ((a8 <= 14 && a17 <= 0) && ((a20 == 1 && a17 == 1) || (a20 == 1 && 5 <= a16)))) || ((a17 <= 0 && !(a7 == 1)) && 15 <= a8)) || ((a8 <= 14 && a16 <= 4) && a17 == 1)) || (((a21 == 1 && a16 <= 4) && a20 == 1) && a17 == 1)) || (a16 <= 5 && a17 <= 0)) || ((!(a7 == 1) && 15 <= a8) && a17 == 1)) || ((a21 == 1 && a17 <= 0) && ((a20 == 1 && a17 == 1) || (a20 == 1 && 5 <= a16))) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((a21 == 1 && !(a7 == 1)) && ((a20 == 1 && a17 == 1) || (a20 == 1 && 5 <= a16))) && a17 == 1) || ((((a8 <= 14 && a16 <= 5) && a21 <= 0) && ((a20 == 1 && a17 == 1) || (a20 == 1 && 5 <= a16))) && a17 == 1)) || ((a8 <= 14 && a17 <= 0) && ((a20 == 1 && a17 == 1) || (a20 == 1 && 5 <= a16)))) || ((a17 <= 0 && !(a7 == 1)) && 15 <= a8)) || ((a8 <= 14 && a16 <= 4) && a17 == 1)) || (((a21 == 1 && a16 <= 4) && a20 == 1) && a17 == 1)) || (a16 <= 5 && a17 <= 0)) || ((!(a7 == 1) && 15 <= a8) && a17 == 1)) || ((a21 == 1 && a17 <= 0) && ((a20 == 1 && a17 == 1) || (a20 == 1 && 5 <= a16))) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.3s, OverallIterations: 14, TraceHistogramMax: 6, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 639 SDtfs, 828 SDslu, 59 SDs, 0 SdLazy, 3067 SolverSat, 724 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1524 GetRequests, 1492 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1281occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 1420 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 51 NumberOfFragments, 303 HoareAnnotationTreeSize, 3 FomulaSimplifications, 6648 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 826 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 2623 NumberOfCodeBlocks, 2623 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 3345 ConstructedInterpolants, 0 QuantifiedInterpolants, 2672598 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1531 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 20 InterpolantComputations, 17 PerfectInterpolantSequences, 3469/3909 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...