./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci01-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH --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 6b0570f2e0d80d68bc280040cce27f654b3fe7a2c0bad30f9bb811af9ca3d994 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:16:18,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:16:18,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:16:18,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:16:18,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:16:18,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:16:18,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:16:18,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:16:18,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:16:18,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:16:18,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:16:18,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:16:18,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:16:18,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:16:18,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:16:19,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:16:19,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:16:19,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:16:19,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:16:19,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:16:19,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:16:19,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:16:19,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:16:19,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:16:19,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:16:19,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:16:19,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:16:19,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:16:19,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:16:19,050 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:16:19,050 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:16:19,051 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:16:19,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:16:19,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:16:19,055 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:16:19,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:16:19,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:16:19,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:16:19,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:16:19,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:16:19,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:16:19,061 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:16:19,114 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:16:19,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:16:19,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:16:19,117 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:16:19,118 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:16:19,118 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:16:19,118 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:16:19,118 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:16:19,127 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:16:19,127 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:16:19,128 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:16:19,129 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:16:19,129 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:16:19,129 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:16:19,130 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:16:19,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:16:19,131 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:16:19,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:16:19,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:16:19,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:16:19,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:16:19,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:16:19,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:16:19,133 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:16:19,133 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:16:19,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:16:19,134 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:16:19,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:16:19,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:16:19,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:16:19,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:16:19,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:16:19,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:16:19,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:16:19,138 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:16:19,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:16:19,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:16:19,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:16:19,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:16:19,140 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_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b0570f2e0d80d68bc280040cce27f654b3fe7a2c0bad30f9bb811af9ca3d994 [2021-11-03 04:16:19,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:16:19,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:16:19,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:16:19,511 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:16:19,512 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:16:19,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/recursive/Fibonacci01-1.c [2021-11-03 04:16:19,596 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/data/170641cea/f8cf01bb16b54df4a1eda66752a25505/FLAGc8d39920a [2021-11-03 04:16:20,141 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:16:20,142 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/sv-benchmarks/c/recursive/Fibonacci01-1.c [2021-11-03 04:16:20,149 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/data/170641cea/f8cf01bb16b54df4a1eda66752a25505/FLAGc8d39920a [2021-11-03 04:16:20,529 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/data/170641cea/f8cf01bb16b54df4a1eda66752a25505 [2021-11-03 04:16:20,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:16:20,536 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:16:20,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:16:20,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:16:20,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:16:20,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:16:20" (1/1) ... [2021-11-03 04:16:20,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e223cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:16:20, skipping insertion in model container [2021-11-03 04:16:20,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:16:20" (1/1) ... [2021-11-03 04:16:20,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:16:20,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:16:20,801 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/sv-benchmarks/c/recursive/Fibonacci01-1.c[804,817] [2021-11-03 04:16:20,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:16:20,816 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:16:20,834 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/sv-benchmarks/c/recursive/Fibonacci01-1.c[804,817] [2021-11-03 04:16:20,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:16:20,851 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:16:20,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:16:20 WrapperNode [2021-11-03 04:16:20,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:16:20,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:16:20,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:16:20,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:16:20,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:16:20" (1/1) ... [2021-11-03 04:16:20,872 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:16:20" (1/1) ... [2021-11-03 04:16:20,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:16:20,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:16:20,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:16:20,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:16:20,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:16:20" (1/1) ... [2021-11-03 04:16:20,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:16:20" (1/1) ... [2021-11-03 04:16:20,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:16:20" (1/1) ... [2021-11-03 04:16:20,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:16:20" (1/1) ... [2021-11-03 04:16:20,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:16:20" (1/1) ... [2021-11-03 04:16:20,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:16:20" (1/1) ... [2021-11-03 04:16:20,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:16:20" (1/1) ... [2021-11-03 04:16:20,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:16:20,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:16:20,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:16:20,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:16:20,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:16:20" (1/1) ... [2021-11-03 04:16:20,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:16:20,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:16:20,965 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:16:20,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:16:21,013 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2021-11-03 04:16:21,014 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2021-11-03 04:16:21,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:16:21,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:16:21,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:16:21,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:16:21,347 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:16:21,348 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 04:16:21,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:16:21 BoogieIcfgContainer [2021-11-03 04:16:21,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:16:21,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:16:21,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:16:21,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:16:21,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:16:20" (1/3) ... [2021-11-03 04:16:21,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a5a2fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:16:21, skipping insertion in model container [2021-11-03 04:16:21,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:16:20" (2/3) ... [2021-11-03 04:16:21,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a5a2fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:16:21, skipping insertion in model container [2021-11-03 04:16:21,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:16:21" (3/3) ... [2021-11-03 04:16:21,359 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2021-11-03 04:16:21,365 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:16:21,365 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:16:21,413 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:16:21,421 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:16:21,421 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:16:21,440 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-03 04:16:21,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:16:21,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:16:21,447 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:16:21,448 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:16:21,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:16:21,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1216674335, now seen corresponding path program 1 times [2021-11-03 04:16:21,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:16:21,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652168520] [2021-11-03 04:16:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:21,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:16:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:16:21,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:16:21,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652168520] [2021-11-03 04:16:21,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652168520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:16:21,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:16:21,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 04:16:21,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104016483] [2021-11-03 04:16:21,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:16:21,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:16:21,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:16:21,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:16:21,817 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-03 04:16:21,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:16:21,988 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-11-03 04:16:21,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:16:21,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-03 04:16:21,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:16:22,002 INFO L225 Difference]: With dead ends: 28 [2021-11-03 04:16:22,003 INFO L226 Difference]: Without dead ends: 18 [2021-11-03 04:16:22,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:16:22,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-03 04:16:22,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-03 04:16:22,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-03 04:16:22,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-03 04:16:22,056 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-11-03 04:16:22,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:16:22,057 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-03 04:16:22,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-03 04:16:22,058 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-03 04:16:22,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 04:16:22,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:16:22,060 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:16:22,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:16:22,062 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:16:22,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:16:22,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1629096597, now seen corresponding path program 1 times [2021-11-03 04:16:22,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:16:22,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198164068] [2021-11-03 04:16:22,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:22,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:16:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:16:22,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:16:22,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198164068] [2021-11-03 04:16:22,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198164068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:16:22,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:16:22,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 04:16:22,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815240209] [2021-11-03 04:16:22,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:16:22,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:16:22,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:16:22,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:16:22,251 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-03 04:16:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:16:22,372 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2021-11-03 04:16:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:16:22,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-03 04:16:22,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:16:22,376 INFO L225 Difference]: With dead ends: 24 [2021-11-03 04:16:22,376 INFO L226 Difference]: Without dead ends: 20 [2021-11-03 04:16:22,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:16:22,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-03 04:16:22,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-03 04:16:22,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-03 04:16:22,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-03 04:16:22,390 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2021-11-03 04:16:22,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:16:22,391 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-03 04:16:22,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-03 04:16:22,391 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-03 04:16:22,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-03 04:16:22,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:16:22,394 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:16:22,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 04:16:22,395 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:16:22,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:16:22,401 INFO L85 PathProgramCache]: Analyzing trace with hash 161002844, now seen corresponding path program 1 times [2021-11-03 04:16:22,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:16:22,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191088806] [2021-11-03 04:16:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:22,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:16:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:16:22,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:16:22,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191088806] [2021-11-03 04:16:22,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191088806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:16:22,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612395141] [2021-11-03 04:16:22,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:22,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:16:22,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:16:22,546 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:16:22,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 04:16:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:22,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 04:16:22,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:16:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:16:22,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:16:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 04:16:23,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612395141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:16:23,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [611026073] [2021-11-03 04:16:23,527 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-03 04:16:23,528 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:16:23,534 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 04:16:23,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:16:23,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 11] total 20 [2021-11-03 04:16:23,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521169553] [2021-11-03 04:16:23,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-03 04:16:23,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:16:23,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-03 04:16:23,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-11-03 04:16:23,544 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-03 04:16:23,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:16:23,736 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-11-03 04:16:23,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:16:23,737 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 23 [2021-11-03 04:16:23,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:16:23,738 INFO L225 Difference]: With dead ends: 35 [2021-11-03 04:16:23,738 INFO L226 Difference]: Without dead ends: 20 [2021-11-03 04:16:23,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-11-03 04:16:23,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-03 04:16:23,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-03 04:16:23,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-03 04:16:23,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-03 04:16:23,746 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2021-11-03 04:16:23,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:16:23,746 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-03 04:16:23,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-03 04:16:23,747 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-03 04:16:23,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-03 04:16:23,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:16:23,748 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:16:23,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:16:23,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:16:23,974 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:16:23,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:16:23,975 INFO L85 PathProgramCache]: Analyzing trace with hash 592483530, now seen corresponding path program 1 times [2021-11-03 04:16:23,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:16:23,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137239122] [2021-11-03 04:16:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:23,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:16:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 04:16:24,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:16:24,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137239122] [2021-11-03 04:16:24,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137239122] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:16:24,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649799837] [2021-11-03 04:16:24,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:24,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:16:24,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:16:24,175 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:16:24,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 04:16:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:24,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 04:16:24,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:16:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 04:16:24,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:16:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 04:16:24,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649799837] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:16:24,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1466600158] [2021-11-03 04:16:24,926 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-03 04:16:24,926 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:16:24,927 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 04:16:24,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:16:24,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 21 [2021-11-03 04:16:24,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403529549] [2021-11-03 04:16:24,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-03 04:16:24,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:16:24,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-03 04:16:24,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-03 04:16:24,932 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 16 states have internal predecessors, (33), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-03 04:16:25,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:16:25,189 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2021-11-03 04:16:25,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 04:16:25,190 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 16 states have internal predecessors, (33), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 24 [2021-11-03 04:16:25,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:16:25,195 INFO L225 Difference]: With dead ends: 31 [2021-11-03 04:16:25,196 INFO L226 Difference]: Without dead ends: 27 [2021-11-03 04:16:25,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-11-03 04:16:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-03 04:16:25,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-11-03 04:16:25,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-03 04:16:25,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-11-03 04:16:25,208 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 24 [2021-11-03 04:16:25,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:16:25,208 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-11-03 04:16:25,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 16 states have internal predecessors, (33), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-03 04:16:25,208 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-11-03 04:16:25,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-03 04:16:25,210 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:16:25,210 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:16:25,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-03 04:16:25,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:16:25,433 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:16:25,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:16:25,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1310194259, now seen corresponding path program 2 times [2021-11-03 04:16:25,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:16:25,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306417812] [2021-11-03 04:16:25,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:25,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:16:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-03 04:16:25,624 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:16:25,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306417812] [2021-11-03 04:16:25,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306417812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:16:25,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554249298] [2021-11-03 04:16:25,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:16:25,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:16:25,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:16:25,634 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:16:25,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 04:16:25,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-03 04:16:25,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:16:25,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:16:25,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:16:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-03 04:16:26,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:16:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-03 04:16:26,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554249298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:16:26,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1545686477] [2021-11-03 04:16:26,961 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-03 04:16:26,962 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:16:26,963 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 04:16:26,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:16:26,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 14] total 27 [2021-11-03 04:16:26,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217301116] [2021-11-03 04:16:26,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-03 04:16:26,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:16:26,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-03 04:16:26,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-11-03 04:16:26,970 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 21 states have internal predecessors, (49), 8 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-03 04:16:27,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:16:27,587 INFO L93 Difference]: Finished difference Result 53 states and 78 transitions. [2021-11-03 04:16:27,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 04:16:27,588 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 21 states have internal predecessors, (49), 8 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) Word has length 37 [2021-11-03 04:16:27,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:16:27,590 INFO L225 Difference]: With dead ends: 53 [2021-11-03 04:16:27,590 INFO L226 Difference]: Without dead ends: 31 [2021-11-03 04:16:27,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=279, Invalid=1281, Unknown=0, NotChecked=0, Total=1560 [2021-11-03 04:16:27,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-03 04:16:27,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2021-11-03 04:16:27,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-03 04:16:27,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2021-11-03 04:16:27,602 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 37 [2021-11-03 04:16:27,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:16:27,602 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-11-03 04:16:27,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 21 states have internal predecessors, (49), 8 states have call successors, (10), 1 states have call predecessors, (10), 9 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-03 04:16:27,603 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2021-11-03 04:16:27,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-03 04:16:27,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:16:27,605 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:16:27,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:16:27,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:16:27,810 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:16:27,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:16:27,811 INFO L85 PathProgramCache]: Analyzing trace with hash 651238953, now seen corresponding path program 3 times [2021-11-03 04:16:27,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:16:27,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807994345] [2021-11-03 04:16:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:27,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:16:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 04:16:28,049 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:16:28,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807994345] [2021-11-03 04:16:28,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807994345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:16:28,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294817069] [2021-11-03 04:16:28,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:16:28,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:16:28,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:16:28,052 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:16:28,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 04:16:28,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:16:28,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:16:28,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 04:16:28,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:16:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-03 04:16:28,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:16:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:16:29,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294817069] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:16:29,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1259675262] [2021-11-03 04:16:29,687 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-03 04:16:29,687 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:16:29,687 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 04:16:29,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:16:29,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 16] total 29 [2021-11-03 04:16:29,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70997753] [2021-11-03 04:16:29,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-03 04:16:29,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:16:29,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-03 04:16:29,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-11-03 04:16:29,691 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 21 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 9 states have return successors, (14), 12 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-03 04:16:30,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:16:30,255 INFO L93 Difference]: Finished difference Result 53 states and 85 transitions. [2021-11-03 04:16:30,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-03 04:16:30,256 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 21 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 9 states have return successors, (14), 12 states have call predecessors, (14), 8 states have call successors, (14) Word has length 38 [2021-11-03 04:16:30,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:16:30,259 INFO L225 Difference]: With dead ends: 53 [2021-11-03 04:16:30,259 INFO L226 Difference]: Without dead ends: 47 [2021-11-03 04:16:30,260 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=330, Invalid=1650, Unknown=0, NotChecked=0, Total=1980 [2021-11-03 04:16:30,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-03 04:16:30,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2021-11-03 04:16:30,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 24 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (27), 9 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-03 04:16:30,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 57 transitions. [2021-11-03 04:16:30,286 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 57 transitions. Word has length 38 [2021-11-03 04:16:30,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:16:30,289 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 57 transitions. [2021-11-03 04:16:30,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 21 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 9 states have return successors, (14), 12 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-03 04:16:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 57 transitions. [2021-11-03 04:16:30,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 04:16:30,298 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:16:30,298 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:16:30,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:16:30,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-03 04:16:30,499 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:16:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:16:30,499 INFO L85 PathProgramCache]: Analyzing trace with hash 240837571, now seen corresponding path program 4 times [2021-11-03 04:16:30,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:16:30,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735478807] [2021-11-03 04:16:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:30,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:16:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 42 proven. 46 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-03 04:16:30,591 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:16:30,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735478807] [2021-11-03 04:16:30,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735478807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:16:30,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932665597] [2021-11-03 04:16:30,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 04:16:30,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:16:30,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:16:30,593 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:16:30,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-03 04:16:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:30,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:16:30,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:16:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 42 proven. 46 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-03 04:16:30,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:16:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 42 proven. 46 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-03 04:16:31,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932665597] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:16:31,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [416145135] [2021-11-03 04:16:31,290 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-03 04:16:31,290 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:16:31,290 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 04:16:31,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:16:31,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2021-11-03 04:16:31,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887109068] [2021-11-03 04:16:31,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 04:16:31,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:16:31,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 04:16:31,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:16:31,294 INFO L87 Difference]: Start difference. First operand 35 states and 57 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-03 04:16:31,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:16:31,414 INFO L93 Difference]: Finished difference Result 70 states and 132 transitions. [2021-11-03 04:16:31,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:16:31,415 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 66 [2021-11-03 04:16:31,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:16:31,421 INFO L225 Difference]: With dead ends: 70 [2021-11-03 04:16:31,421 INFO L226 Difference]: Without dead ends: 37 [2021-11-03 04:16:31,428 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-11-03 04:16:31,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-03 04:16:31,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-03 04:16:31,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (22), 9 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-03 04:16:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 54 transitions. [2021-11-03 04:16:31,448 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 54 transitions. Word has length 66 [2021-11-03 04:16:31,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:16:31,450 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 54 transitions. [2021-11-03 04:16:31,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-03 04:16:31,452 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 54 transitions. [2021-11-03 04:16:31,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 04:16:31,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:16:31,460 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:16:31,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:16:31,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-03 04:16:31,686 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:16:31,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:16:31,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1360547340, now seen corresponding path program 5 times [2021-11-03 04:16:31,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:16:31,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078916846] [2021-11-03 04:16:31,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:31,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:16:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 55 proven. 93 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-03 04:16:31,908 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:16:31,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078916846] [2021-11-03 04:16:31,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078916846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:16:31,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064581239] [2021-11-03 04:16:31,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:16:31,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:16:31,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:16:31,914 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:16:31,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-03 04:16:32,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-03 04:16:32,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:16:32,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:16:32,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:16:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 134 proven. 17 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-03 04:16:32,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:16:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 134 proven. 18 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-03 04:16:33,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064581239] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:16:33,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [883267344] [2021-11-03 04:16:33,021 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-03 04:16:33,022 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:16:33,022 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 04:16:33,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:16:33,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 17 [2021-11-03 04:16:33,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597681299] [2021-11-03 04:16:33,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-03 04:16:33,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:16:33,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-03 04:16:33,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-11-03 04:16:33,028 INFO L87 Difference]: Start difference. First operand 37 states and 54 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 8 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-03 04:16:33,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:16:33,345 INFO L93 Difference]: Finished difference Result 79 states and 127 transitions. [2021-11-03 04:16:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 04:16:33,346 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 8 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) Word has length 79 [2021-11-03 04:16:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:16:33,348 INFO L225 Difference]: With dead ends: 79 [2021-11-03 04:16:33,348 INFO L226 Difference]: Without dead ends: 45 [2021-11-03 04:16:33,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2021-11-03 04:16:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-03 04:16:33,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-03 04:16:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.0625) internal successors, (34), 30 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (16), 9 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-03 04:16:33,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2021-11-03 04:16:33,373 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 79 [2021-11-03 04:16:33,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:16:33,374 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-11-03 04:16:33,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 8 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-03 04:16:33,375 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2021-11-03 04:16:33,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-03 04:16:33,378 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:16:33,379 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:16:33,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:16:33,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-03 04:16:33,602 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:16:33,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:16:33,603 INFO L85 PathProgramCache]: Analyzing trace with hash -2071546414, now seen corresponding path program 6 times [2021-11-03 04:16:33,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:16:33,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507203174] [2021-11-03 04:16:33,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:33,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:16:33,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 101 proven. 213 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-03 04:16:33,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:16:33,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507203174] [2021-11-03 04:16:33,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507203174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:16:33,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542808664] [2021-11-03 04:16:33,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:16:33,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:16:33,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:16:33,826 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:16:33,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-03 04:16:34,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:16:34,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:16:34,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:16:34,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:16:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 116 proven. 229 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-03 04:16:34,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:16:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 116 proven. 241 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2021-11-03 04:16:35,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542808664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:16:35,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [666160803] [2021-11-03 04:16:35,771 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-03 04:16:35,772 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:16:35,772 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 04:16:35,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:16:35,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 15] total 20 [2021-11-03 04:16:35,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743622559] [2021-11-03 04:16:35,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-03 04:16:35,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:16:35,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-03 04:16:35,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-03 04:16:35,780 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 14 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (21), 9 states have call predecessors, (21), 14 states have call successors, (21) [2021-11-03 04:16:36,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:16:36,144 INFO L93 Difference]: Finished difference Result 100 states and 142 transitions. [2021-11-03 04:16:36,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 04:16:36,145 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 14 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (21), 9 states have call predecessors, (21), 14 states have call successors, (21) Word has length 106 [2021-11-03 04:16:36,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:16:36,147 INFO L225 Difference]: With dead ends: 100 [2021-11-03 04:16:36,148 INFO L226 Difference]: Without dead ends: 60 [2021-11-03 04:16:36,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2021-11-03 04:16:36,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-03 04:16:36,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2021-11-03 04:16:36,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 34 states have internal predecessors, (38), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (18), 10 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-03 04:16:36,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-11-03 04:16:36,162 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 106 [2021-11-03 04:16:36,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:16:36,163 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-11-03 04:16:36,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 14 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (21), 9 states have call predecessors, (21), 14 states have call successors, (21) [2021-11-03 04:16:36,164 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-11-03 04:16:36,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-03 04:16:36,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:16:36,166 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:16:36,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:16:36,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:16:36,377 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:16:36,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:16:36,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1101187310, now seen corresponding path program 7 times [2021-11-03 04:16:36,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:16:36,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332221908] [2021-11-03 04:16:36,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:36,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:16:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 181 proven. 305 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2021-11-03 04:16:36,583 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:16:36,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332221908] [2021-11-03 04:16:36,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332221908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:16:36,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830747549] [2021-11-03 04:16:36,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 04:16:36,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:16:36,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:16:36,585 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:16:36,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-03 04:16:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:37,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-03 04:16:37,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:16:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 207 proven. 356 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-11-03 04:16:37,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:16:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 207 proven. 383 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-03 04:16:39,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830747549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:16:39,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1341869937] [2021-11-03 04:16:39,210 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-03 04:16:39,210 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:16:39,211 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 04:16:39,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:16:39,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 19] total 24 [2021-11-03 04:16:39,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177311695] [2021-11-03 04:16:39,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-03 04:16:39,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:16:39,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-03 04:16:39,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-11-03 04:16:39,215 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 24 states have internal predecessors, (73), 17 states have call successors, (21), 1 states have call predecessors, (21), 10 states have return successors, (27), 11 states have call predecessors, (27), 17 states have call successors, (27) [2021-11-03 04:16:39,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:16:39,753 INFO L93 Difference]: Finished difference Result 121 states and 177 transitions. [2021-11-03 04:16:39,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-03 04:16:39,754 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 24 states have internal predecessors, (73), 17 states have call successors, (21), 1 states have call predecessors, (21), 10 states have return successors, (27), 11 states have call predecessors, (27), 17 states have call successors, (27) Word has length 133 [2021-11-03 04:16:39,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:16:39,757 INFO L225 Difference]: With dead ends: 121 [2021-11-03 04:16:39,757 INFO L226 Difference]: Without dead ends: 75 [2021-11-03 04:16:39,759 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 257 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=416, Invalid=1144, Unknown=0, NotChecked=0, Total=1560 [2021-11-03 04:16:39,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-03 04:16:39,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-11-03 04:16:39,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.0625) internal successors, (51), 45 states have internal predecessors, (51), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (31), 14 states have call predecessors, (31), 11 states have call successors, (31) [2021-11-03 04:16:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 93 transitions. [2021-11-03 04:16:39,773 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 93 transitions. Word has length 133 [2021-11-03 04:16:39,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:16:39,774 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 93 transitions. [2021-11-03 04:16:39,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 24 states have internal predecessors, (73), 17 states have call successors, (21), 1 states have call predecessors, (21), 10 states have return successors, (27), 11 states have call predecessors, (27), 17 states have call successors, (27) [2021-11-03 04:16:39,774 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 93 transitions. [2021-11-03 04:16:39,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-03 04:16:39,777 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:16:39,778 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:16:39,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:16:40,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-03 04:16:40,002 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:16:40,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:16:40,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1526876107, now seen corresponding path program 8 times [2021-11-03 04:16:40,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:16:40,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467000760] [2021-11-03 04:16:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:40,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:16:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 77 proven. 845 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2021-11-03 04:16:40,629 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:16:40,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467000760] [2021-11-03 04:16:40,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467000760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:16:40,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519560055] [2021-11-03 04:16:40,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:16:40,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:16:40,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:16:40,632 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:16:40,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-03 04:16:41,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-03 04:16:41,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:16:41,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-03 04:16:41,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:16:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 476 proven. 283 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2021-11-03 04:16:42,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:16:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 381 proven. 390 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2021-11-03 04:16:48,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519560055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:16:48,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1168055938] [2021-11-03 04:16:48,894 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-03 04:16:48,895 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:16:48,895 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 04:16:48,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:16:48,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 30] total 61 [2021-11-03 04:16:48,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582012873] [2021-11-03 04:16:48,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-03 04:16:48,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:16:48,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-03 04:16:48,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=3312, Unknown=0, NotChecked=0, Total=3660 [2021-11-03 04:16:48,902 INFO L87 Difference]: Start difference. First operand 68 states and 93 transitions. Second operand has 61 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 38 states have internal predecessors, (80), 18 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (37), 36 states have call predecessors, (37), 18 states have call successors, (37) [2021-11-03 04:16:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:16:50,151 INFO L93 Difference]: Finished difference Result 87 states and 125 transitions. [2021-11-03 04:16:50,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-03 04:16:50,152 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 38 states have internal predecessors, (80), 18 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (37), 36 states have call predecessors, (37), 18 states have call successors, (37) Word has length 174 [2021-11-03 04:16:50,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:16:50,153 INFO L225 Difference]: With dead ends: 87 [2021-11-03 04:16:50,153 INFO L226 Difference]: Without dead ends: 0 [2021-11-03 04:16:50,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2354 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=875, Invalid=6435, Unknown=0, NotChecked=0, Total=7310 [2021-11-03 04:16:50,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-03 04:16:50,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-03 04:16:50,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:16:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-03 04:16:50,158 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 174 [2021-11-03 04:16:50,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:16:50,158 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-03 04:16:50,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 38 states have internal predecessors, (80), 18 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (37), 36 states have call predecessors, (37), 18 states have call successors, (37) [2021-11-03 04:16:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-03 04:16:50,159 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-03 04:16:50,161 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 04:16:50,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-03 04:16:50,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:16:50,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-03 04:16:50,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:16:50,901 INFO L857 garLoopResultBuilder]: For program point fibonacciFINAL(lines 16 24) no Hoare annotation was computed. [2021-11-03 04:16:50,902 INFO L860 garLoopResultBuilder]: At program point fibonacciENTRY(lines 16 24) the Hoare annotation is: true [2021-11-03 04:16:50,902 INFO L853 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: (and (<= fibonacci_~n |fibonacci_#in~n|) (<= |fibonacci_#in~n| fibonacci_~n) (not (<= |fibonacci_#in~n| 1))) [2021-11-03 04:16:50,902 INFO L857 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-11-03 04:16:50,902 INFO L853 garLoopResultBuilder]: At program point L22-2(line 22) the Hoare annotation is: (and (let ((.cse0 (<= fibonacci_~n |fibonacci_#in~n|)) (.cse1 (<= |fibonacci_#in~n| fibonacci_~n))) (or (and (<= fibonacci_~n 5) .cse0 (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret7| 2)) .cse1) (and .cse0 (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret7| 1)) .cse1))) (or (not (<= |fibonacci_#in~n| 3)) (= |fibonacci_#t~ret7| 1)) (not (<= |fibonacci_#in~n| 1))) [2021-11-03 04:16:50,902 INFO L857 garLoopResultBuilder]: For program point L19(lines 19 23) no Hoare annotation was computed. [2021-11-03 04:16:50,902 INFO L857 garLoopResultBuilder]: For program point L22-3(line 22) no Hoare annotation was computed. [2021-11-03 04:16:50,903 INFO L857 garLoopResultBuilder]: For program point fibonacciEXIT(lines 16 24) no Hoare annotation was computed. [2021-11-03 04:16:50,903 INFO L857 garLoopResultBuilder]: For program point L17(lines 17 23) no Hoare annotation was computed. [2021-11-03 04:16:50,903 INFO L857 garLoopResultBuilder]: For program point L33(lines 33 37) no Hoare annotation was computed. [2021-11-03 04:16:50,903 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-03 04:16:50,903 INFO L860 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: true [2021-11-03 04:16:50,903 INFO L857 garLoopResultBuilder]: For program point L32-1(line 32) no Hoare annotation was computed. [2021-11-03 04:16:50,903 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-03 04:16:50,903 INFO L857 garLoopResultBuilder]: For program point L29(lines 29 31) no Hoare annotation was computed. [2021-11-03 04:16:50,903 INFO L860 garLoopResultBuilder]: At program point L27(lines 27 38) the Hoare annotation is: true [2021-11-03 04:16:50,903 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 36) no Hoare annotation was computed. [2021-11-03 04:16:50,903 INFO L857 garLoopResultBuilder]: For program point L36(line 36) no Hoare annotation was computed. [2021-11-03 04:16:50,907 INFO L731 BasicCegarLoop]: Path program histogram: [8, 1, 1, 1] [2021-11-03 04:16:50,908 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 04:16:50,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 04:16:50 BoogieIcfgContainer [2021-11-03 04:16:50,916 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 04:16:50,916 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 04:16:50,917 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 04:16:50,917 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 04:16:50,917 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:16:21" (3/4) ... [2021-11-03 04:16:50,920 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-03 04:16:50,927 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2021-11-03 04:16:50,931 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-11-03 04:16:50,931 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-03 04:16:50,932 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-03 04:16:50,932 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-03 04:16:50,963 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/witness.graphml [2021-11-03 04:16:50,964 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 04:16:50,965 INFO L168 Benchmark]: Toolchain (without parser) took 30428.01 ms. Allocated memory was 125.8 MB in the beginning and 220.2 MB in the end (delta: 94.4 MB). Free memory was 87.0 MB in the beginning and 133.9 MB in the end (delta: -47.0 MB). Peak memory consumption was 49.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:16:50,966 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 125.8 MB. Free memory is still 103.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:16:50,966 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.40 ms. Allocated memory is still 125.8 MB. Free memory was 86.7 MB in the beginning and 100.6 MB in the end (delta: -13.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:16:50,967 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.24 ms. Allocated memory is still 125.8 MB. Free memory was 100.6 MB in the beginning and 99.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:16:50,967 INFO L168 Benchmark]: Boogie Preprocessor took 29.03 ms. Allocated memory is still 125.8 MB. Free memory was 99.1 MB in the beginning and 98.5 MB in the end (delta: 538.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:16:50,967 INFO L168 Benchmark]: RCFGBuilder took 426.60 ms. Allocated memory is still 125.8 MB. Free memory was 98.5 MB in the beginning and 88.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:16:50,968 INFO L168 Benchmark]: TraceAbstraction took 29563.63 ms. Allocated memory was 125.8 MB in the beginning and 220.2 MB in the end (delta: 94.4 MB). Free memory was 87.6 MB in the beginning and 136.0 MB in the end (delta: -48.5 MB). Peak memory consumption was 138.8 MB. Max. memory is 16.1 GB. [2021-11-03 04:16:50,968 INFO L168 Benchmark]: Witness Printer took 47.39 ms. Allocated memory is still 220.2 MB. Free memory was 136.0 MB in the beginning and 133.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-03 04:16:50,971 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 125.8 MB. Free memory is still 103.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 310.40 ms. Allocated memory is still 125.8 MB. Free memory was 86.7 MB in the beginning and 100.6 MB in the end (delta: -13.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.24 ms. Allocated memory is still 125.8 MB. Free memory was 100.6 MB in the beginning and 99.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.03 ms. Allocated memory is still 125.8 MB. Free memory was 99.1 MB in the beginning and 98.5 MB in the end (delta: 538.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 426.60 ms. Allocated memory is still 125.8 MB. Free memory was 98.5 MB in the beginning and 88.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 29563.63 ms. Allocated memory was 125.8 MB in the beginning and 220.2 MB in the end (delta: 94.4 MB). Free memory was 87.6 MB in the beginning and 136.0 MB in the end (delta: -48.5 MB). Peak memory consumption was 138.8 MB. Max. memory is 16.1 GB. * Witness Printer took 47.39 ms. Allocated memory is still 220.2 MB. Free memory was 136.0 MB in the beginning and 133.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 36]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 29.4s, OverallIterations: 11, TraceHistogramMax: 25, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 170 SDtfs, 485 SDslu, 943 SDs, 0 SdLazy, 2592 SolverSat, 597 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1619 GetRequests, 1285 SyntacticMatches, 8 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3862 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=10, InterpolantAutomatonStates: 159, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 38 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 122 PreInvPairs, 174 NumberOfFragments, 55 HoareAnnotationTreeSize, 122 FomulaSimplifications, 828 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 5 FomulaSimplificationsInter, 786 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 18.9s InterpolantComputationTime, 1381 NumberOfCodeBlocks, 1336 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 2032 ConstructedInterpolants, 0 QuantifiedInterpolants, 5029 SizeOfPredicates, 44 NumberOfNonLiveVariables, 1646 ConjunctsInSsa, 169 ConjunctsInUnsatCore, 29 InterpolantComputations, 2 PerfectInterpolantSequences, 7625/11313 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-03 04:16:51,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a1207ec-6bc4-487b-9ef1-31f5e55d3171/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE