./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label06.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8 --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 0610fb40496b0ecade3a5ec9ba274ec558241ab5 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:04:14,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:04:14,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:04:14,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:04:14,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:04:14,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:04:14,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:04:14,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:04:14,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:04:14,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:04:14,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:04:14,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:04:14,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:04:14,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:04:14,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:04:14,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:04:14,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:04:14,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:04:14,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:04:14,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:04:14,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:04:14,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:04:14,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:04:14,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:04:14,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:04:14,852 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:04:14,853 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:04:14,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:04:14,859 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:04:14,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:04:14,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:04:14,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:04:14,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:04:14,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:04:14,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:04:14,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:04:14,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:04:14,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:04:14,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:04:14,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:04:14,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:04:14,878 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:04:14,925 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:04:14,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:04:14,927 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:04:14,927 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:04:14,927 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:04:14,927 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:04:14,928 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:04:14,928 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:04:14,928 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:04:14,929 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:04:14,929 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:04:14,929 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:04:14,929 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:04:14,930 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:04:14,930 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:04:14,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:04:14,931 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:04:14,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:04:14,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:04:14,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:04:14,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:04:14,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:04:14,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:04:14,933 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:04:14,934 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:04:14,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:04:14,934 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:04:14,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:04:14,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:04:14,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:04:14,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:04:14,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:04:14,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:04:14,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:04:14,936 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:04:14,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:04:14,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:04:14,937 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:04:14,937 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:04:14,938 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_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0610fb40496b0ecade3a5ec9ba274ec558241ab5 [2021-10-13 08:04:15,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:04:15,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:04:15,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:04:15,309 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:04:15,310 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:04:15,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/eca-rers2012/Problem01_label06.c [2021-10-13 08:04:15,398 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/data/d9ffa60f3/901c555a87e44f3b822402232e01fc73/FLAGfb3909b70 [2021-10-13 08:04:16,106 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:04:16,107 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/sv-benchmarks/c/eca-rers2012/Problem01_label06.c [2021-10-13 08:04:16,122 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/data/d9ffa60f3/901c555a87e44f3b822402232e01fc73/FLAGfb3909b70 [2021-10-13 08:04:16,306 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/data/d9ffa60f3/901c555a87e44f3b822402232e01fc73 [2021-10-13 08:04:16,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:04:16,310 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:04:16,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:04:16,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:04:16,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:04:16,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:16" (1/1) ... [2021-10-13 08:04:16,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46185062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:16, skipping insertion in model container [2021-10-13 08:04:16,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:16" (1/1) ... [2021-10-13 08:04:16,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:04:16,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:04:16,859 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_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/sv-benchmarks/c/eca-rers2012/Problem01_label06.c[20964,20977] [2021-10-13 08:04:16,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:04:16,885 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:04:16,997 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_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/sv-benchmarks/c/eca-rers2012/Problem01_label06.c[20964,20977] [2021-10-13 08:04:17,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:04:17,036 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:04:17,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17 WrapperNode [2021-10-13 08:04:17,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:04:17,039 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:04:17,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:04:17,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:04:17,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (1/1) ... [2021-10-13 08:04:17,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (1/1) ... [2021-10-13 08:04:17,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:04:17,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:04:17,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:04:17,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:04:17,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (1/1) ... [2021-10-13 08:04:17,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (1/1) ... [2021-10-13 08:04:17,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (1/1) ... [2021-10-13 08:04:17,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (1/1) ... [2021-10-13 08:04:17,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (1/1) ... [2021-10-13 08:04:17,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (1/1) ... [2021-10-13 08:04:17,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (1/1) ... [2021-10-13 08:04:17,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:04:17,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:04:17,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:04:17,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:04:17,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (1/1) ... [2021-10-13 08:04:17,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:04:17,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:17,311 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:04:17,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:04:17,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:04:17,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:04:17,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:04:17,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:04:19,420 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:04:19,421 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 08:04:19,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:19 BoogieIcfgContainer [2021-10-13 08:04:19,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:04:19,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:04:19,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:04:19,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:04:19,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:04:16" (1/3) ... [2021-10-13 08:04:19,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aabc63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:19, skipping insertion in model container [2021-10-13 08:04:19,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (2/3) ... [2021-10-13 08:04:19,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aabc63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:19, skipping insertion in model container [2021-10-13 08:04:19,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:19" (3/3) ... [2021-10-13 08:04:19,437 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label06.c [2021-10-13 08:04:19,449 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:04:19,450 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:04:19,505 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:04:19,513 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, mConcurrency=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 [2021-10-13 08:04:19,514 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:04:19,535 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 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) [2021-10-13 08:04:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-13 08:04:19,547 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:19,548 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:19,548 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:19,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:19,564 INFO L82 PathProgramCache]: Analyzing trace with hash -104647224, now seen corresponding path program 1 times [2021-10-13 08:04:19,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:04:19,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132899946] [2021-10-13 08:04:19,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:19,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:04:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:04:19,971 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:04:19,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132899946] [2021-10-13 08:04:19,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132899946] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:19,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:04:19,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:04:19,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505388943] [2021-10-13 08:04:19,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:04:19,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:04:19,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:04:19,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:04:19,999 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 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) Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) [2021-10-13 08:04:20,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:20,388 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-13 08:04:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:04:20,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) Word has length 71 [2021-10-13 08:04:20,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:20,402 INFO L225 Difference]: With dead ends: 224 [2021-10-13 08:04:20,403 INFO L226 Difference]: Without dead ends: 145 [2021-10-13 08:04:20,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:04:20,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-13 08:04:20,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-13 08:04:20,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.7986111111111112) internal successors, (259), 144 states have internal predecessors, (259), 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) [2021-10-13 08:04:20,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2021-10-13 08:04:20,455 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2021-10-13 08:04:20,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:20,456 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2021-10-13 08:04:20,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) [2021-10-13 08:04:20,457 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2021-10-13 08:04:20,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-13 08:04:20,461 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:20,461 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:20,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:04:20,462 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:20,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:20,463 INFO L82 PathProgramCache]: Analyzing trace with hash -601800805, now seen corresponding path program 1 times [2021-10-13 08:04:20,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:04:20,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601036149] [2021-10-13 08:04:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:20,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:04:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:04:20,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:04:20,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601036149] [2021-10-13 08:04:20,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601036149] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:20,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:04:20,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:04:20,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176628782] [2021-10-13 08:04:20,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:04:20,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:04:20,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:04:20,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:04:20,553 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2021-10-13 08:04:21,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:21,001 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2021-10-13 08:04:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:04:21,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) Word has length 77 [2021-10-13 08:04:21,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:21,005 INFO L225 Difference]: With dead ends: 431 [2021-10-13 08:04:21,005 INFO L226 Difference]: Without dead ends: 287 [2021-10-13 08:04:21,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:04:21,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-13 08:04:21,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-13 08:04:21,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.632867132867133) internal successors, (467), 286 states have internal predecessors, (467), 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) [2021-10-13 08:04:21,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 467 transitions. [2021-10-13 08:04:21,048 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 467 transitions. Word has length 77 [2021-10-13 08:04:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:21,049 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 467 transitions. [2021-10-13 08:04:21,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2021-10-13 08:04:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 467 transitions. [2021-10-13 08:04:21,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-13 08:04:21,060 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:21,060 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:21,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 08:04:21,062 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:21,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:21,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1874602250, now seen corresponding path program 1 times [2021-10-13 08:04:21,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:04:21,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329551503] [2021-10-13 08:04:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:21,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:04:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 08:04:21,253 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:04:21,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329551503] [2021-10-13 08:04:21,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329551503] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:21,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:04:21,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:04:21,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986018142] [2021-10-13 08:04:21,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:04:21,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:04:21,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:04:21,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:04:21,258 INFO L87 Difference]: Start difference. First operand 287 states and 467 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2021-10-13 08:04:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:21,700 INFO L93 Difference]: Finished difference Result 715 states and 1184 transitions. [2021-10-13 08:04:21,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:04:21,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) Word has length 105 [2021-10-13 08:04:21,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:21,705 INFO L225 Difference]: With dead ends: 715 [2021-10-13 08:04:21,706 INFO L226 Difference]: Without dead ends: 429 [2021-10-13 08:04:21,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:04:21,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-13 08:04:21,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 358. [2021-10-13 08:04:21,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.6442577030812324) internal successors, (587), 357 states have internal predecessors, (587), 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) [2021-10-13 08:04:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 587 transitions. [2021-10-13 08:04:21,737 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 587 transitions. Word has length 105 [2021-10-13 08:04:21,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:21,738 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 587 transitions. [2021-10-13 08:04:21,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2021-10-13 08:04:21,739 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 587 transitions. [2021-10-13 08:04:21,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-13 08:04:21,743 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:21,743 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:21,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 08:04:21,744 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:21,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:21,745 INFO L82 PathProgramCache]: Analyzing trace with hash -300543680, now seen corresponding path program 1 times [2021-10-13 08:04:21,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:04:21,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952712166] [2021-10-13 08:04:21,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:21,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:04:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-13 08:04:21,837 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:04:21,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952712166] [2021-10-13 08:04:21,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952712166] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:21,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:04:21,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:04:21,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836851775] [2021-10-13 08:04:21,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:04:21,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:04:21,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:04:21,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:04:21,841 INFO L87 Difference]: Start difference. First operand 358 states and 587 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2021-10-13 08:04:22,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:22,172 INFO L93 Difference]: Finished difference Result 715 states and 1173 transitions. [2021-10-13 08:04:22,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:04:22,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) Word has length 109 [2021-10-13 08:04:22,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:22,176 INFO L225 Difference]: With dead ends: 715 [2021-10-13 08:04:22,176 INFO L226 Difference]: Without dead ends: 358 [2021-10-13 08:04:22,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:04:22,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-10-13 08:04:22,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2021-10-13 08:04:22,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.6274509803921569) internal successors, (581), 357 states have internal predecessors, (581), 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) [2021-10-13 08:04:22,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 581 transitions. [2021-10-13 08:04:22,199 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 581 transitions. Word has length 109 [2021-10-13 08:04:22,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:22,200 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 581 transitions. [2021-10-13 08:04:22,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2021-10-13 08:04:22,201 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 581 transitions. [2021-10-13 08:04:22,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-13 08:04:22,203 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:22,203 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:22,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 08:04:22,204 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:22,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:22,205 INFO L82 PathProgramCache]: Analyzing trace with hash -609028872, now seen corresponding path program 1 times [2021-10-13 08:04:22,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:04:22,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640955679] [2021-10-13 08:04:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:22,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:04:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-13 08:04:22,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:04:22,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640955679] [2021-10-13 08:04:22,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640955679] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:04:22,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752334526] [2021-10-13 08:04:22,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:22,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:22,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:22,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:04:22,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:04:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:22,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:04:22,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 08:04:22,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 08:04:23,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752334526] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:23,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 08:04:23,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2021-10-13 08:04:23,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277098230] [2021-10-13 08:04:23,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:04:23,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:04:23,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:04:23,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:04:23,398 INFO L87 Difference]: Start difference. First operand 358 states and 581 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-10-13 08:04:23,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:23,761 INFO L93 Difference]: Finished difference Result 715 states and 1161 transitions. [2021-10-13 08:04:23,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:04:23,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) Word has length 113 [2021-10-13 08:04:23,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:23,766 INFO L225 Difference]: With dead ends: 715 [2021-10-13 08:04:23,766 INFO L226 Difference]: Without dead ends: 358 [2021-10-13 08:04:23,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:04:23,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-10-13 08:04:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 287. [2021-10-13 08:04:23,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.486013986013986) internal successors, (425), 286 states have internal predecessors, (425), 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) [2021-10-13 08:04:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 425 transitions. [2021-10-13 08:04:23,779 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 425 transitions. Word has length 113 [2021-10-13 08:04:23,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:23,780 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 425 transitions. [2021-10-13 08:04:23,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-10-13 08:04:23,780 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 425 transitions. [2021-10-13 08:04:23,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-10-13 08:04:23,782 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:23,782 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:23,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:23,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:23,996 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:23,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:23,997 INFO L82 PathProgramCache]: Analyzing trace with hash -2139621542, now seen corresponding path program 1 times [2021-10-13 08:04:23,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:04:23,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631220411] [2021-10-13 08:04:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:23,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:04:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-13 08:04:24,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:04:24,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631220411] [2021-10-13 08:04:24,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631220411] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:04:24,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908364357] [2021-10-13 08:04:24,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:24,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:24,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:24,077 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:04:24,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 08:04:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:24,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:04:24,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-13 08:04:24,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-13 08:04:25,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908364357] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:25,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 08:04:25,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2021-10-13 08:04:25,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073124249] [2021-10-13 08:04:25,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:04:25,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:04:25,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:04:25,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:04:25,023 INFO L87 Difference]: Start difference. First operand 287 states and 425 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2021-10-13 08:04:25,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:25,349 INFO L93 Difference]: Finished difference Result 431 states and 635 transitions. [2021-10-13 08:04:25,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:04:25,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) Word has length 125 [2021-10-13 08:04:25,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:25,353 INFO L225 Difference]: With dead ends: 431 [2021-10-13 08:04:25,353 INFO L226 Difference]: Without dead ends: 429 [2021-10-13 08:04:25,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:04:25,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-13 08:04:25,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 287. [2021-10-13 08:04:25,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.486013986013986) internal successors, (425), 286 states have internal predecessors, (425), 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) [2021-10-13 08:04:25,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 425 transitions. [2021-10-13 08:04:25,365 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 425 transitions. Word has length 125 [2021-10-13 08:04:25,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:25,366 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 425 transitions. [2021-10-13 08:04:25,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2021-10-13 08:04:25,366 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 425 transitions. [2021-10-13 08:04:25,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-10-13 08:04:25,368 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:25,368 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:25,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:25,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-13 08:04:25,584 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:25,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:25,585 INFO L82 PathProgramCache]: Analyzing trace with hash -709122597, now seen corresponding path program 1 times [2021-10-13 08:04:25,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:04:25,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073876090] [2021-10-13 08:04:25,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:25,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:04:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:25,695 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 08:04:25,696 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:04:25,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073876090] [2021-10-13 08:04:25,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073876090] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:25,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:04:25,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:04:25,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103671196] [2021-10-13 08:04:25,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:04:25,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:04:25,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:04:25,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:04:25,704 INFO L87 Difference]: Start difference. First operand 287 states and 425 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 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) [2021-10-13 08:04:26,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:26,034 INFO L93 Difference]: Finished difference Result 786 states and 1152 transitions. [2021-10-13 08:04:26,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:04:26,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 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) Word has length 129 [2021-10-13 08:04:26,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:26,039 INFO L225 Difference]: With dead ends: 786 [2021-10-13 08:04:26,039 INFO L226 Difference]: Without dead ends: 500 [2021-10-13 08:04:26,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:04:26,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-10-13 08:04:26,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 429. [2021-10-13 08:04:26,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.4228971962616823) internal successors, (609), 428 states have internal predecessors, (609), 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) [2021-10-13 08:04:26,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 609 transitions. [2021-10-13 08:04:26,057 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 609 transitions. Word has length 129 [2021-10-13 08:04:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:26,057 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 609 transitions. [2021-10-13 08:04:26,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 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) [2021-10-13 08:04:26,058 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 609 transitions. [2021-10-13 08:04:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-10-13 08:04:26,060 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:26,060 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:26,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 08:04:26,061 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:26,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:26,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1787509431, now seen corresponding path program 1 times [2021-10-13 08:04:26,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:04:26,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393345242] [2021-10-13 08:04:26,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:26,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:04:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-13 08:04:26,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:04:26,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393345242] [2021-10-13 08:04:26,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393345242] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:26,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:04:26,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:04:26,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821025139] [2021-10-13 08:04:26,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:04:26,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:04:26,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:04:26,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:04:26,147 INFO L87 Difference]: Start difference. First operand 429 states and 609 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-10-13 08:04:26,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:26,521 INFO L93 Difference]: Finished difference Result 1212 states and 1704 transitions. [2021-10-13 08:04:26,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:04:26,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) Word has length 138 [2021-10-13 08:04:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:26,528 INFO L225 Difference]: With dead ends: 1212 [2021-10-13 08:04:26,528 INFO L226 Difference]: Without dead ends: 784 [2021-10-13 08:04:26,529 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:04:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-10-13 08:04:26,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 571. [2021-10-13 08:04:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 1.4228070175438596) internal successors, (811), 570 states have internal predecessors, (811), 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) [2021-10-13 08:04:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 811 transitions. [2021-10-13 08:04:26,553 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 811 transitions. Word has length 138 [2021-10-13 08:04:26,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:26,555 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 811 transitions. [2021-10-13 08:04:26,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-10-13 08:04:26,561 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 811 transitions. [2021-10-13 08:04:26,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-10-13 08:04:26,564 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:26,566 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:26,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 08:04:26,566 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:26,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:26,567 INFO L82 PathProgramCache]: Analyzing trace with hash -366899958, now seen corresponding path program 1 times [2021-10-13 08:04:26,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:04:26,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13017386] [2021-10-13 08:04:26,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:26,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:04:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 36 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-10-13 08:04:26,660 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:04:26,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13017386] [2021-10-13 08:04:26,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13017386] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:04:26,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056212209] [2021-10-13 08:04:26,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:26,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:26,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:26,666 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:04:26,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 08:04:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:27,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:04:27,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 08:04:27,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 08:04:28,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056212209] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:28,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 08:04:28,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2021-10-13 08:04:28,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314433026] [2021-10-13 08:04:28,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:04:28,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:04:28,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:04:28,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:04:28,059 INFO L87 Difference]: Start difference. First operand 571 states and 811 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2021-10-13 08:04:28,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:28,382 INFO L93 Difference]: Finished difference Result 1070 states and 1526 transitions. [2021-10-13 08:04:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:04:28,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) Word has length 145 [2021-10-13 08:04:28,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:28,390 INFO L225 Difference]: With dead ends: 1070 [2021-10-13 08:04:28,391 INFO L226 Difference]: Without dead ends: 1068 [2021-10-13 08:04:28,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:04:28,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-10-13 08:04:28,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 997. [2021-10-13 08:04:28,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.4166666666666667) internal successors, (1411), 996 states have internal predecessors, (1411), 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) [2021-10-13 08:04:28,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1411 transitions. [2021-10-13 08:04:28,433 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1411 transitions. Word has length 145 [2021-10-13 08:04:28,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:28,434 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1411 transitions. [2021-10-13 08:04:28,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2021-10-13 08:04:28,435 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1411 transitions. [2021-10-13 08:04:28,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-10-13 08:04:28,439 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:04:28,439 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:04:28,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:28,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:28,649 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:04:28,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:04:28,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1520553140, now seen corresponding path program 1 times [2021-10-13 08:04:28,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:04:28,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487081752] [2021-10-13 08:04:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:28,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:04:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-13 08:04:28,747 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:04:28,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487081752] [2021-10-13 08:04:28,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487081752] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:04:28,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714729753] [2021-10-13 08:04:28,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:28,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:28,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:28,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:04:28,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 08:04:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:29,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:04:29,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-10-13 08:04:29,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-10-13 08:04:29,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714729753] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:04:29,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 08:04:29,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2021-10-13 08:04:29,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765966954] [2021-10-13 08:04:29,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:04:29,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:04:29,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:04:29,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:04:29,977 INFO L87 Difference]: Start difference. First operand 997 states and 1411 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2021-10-13 08:04:30,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:04:30,358 INFO L93 Difference]: Finished difference Result 2062 states and 2915 transitions. [2021-10-13 08:04:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:04:30,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) Word has length 156 [2021-10-13 08:04:30,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:04:30,360 INFO L225 Difference]: With dead ends: 2062 [2021-10-13 08:04:30,360 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 08:04:30,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 309 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:04:30,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 08:04:30,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 08:04:30,363 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) [2021-10-13 08:04:30,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 08:04:30,364 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 156 [2021-10-13 08:04:30,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:04:30,364 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 08:04:30,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2021-10-13 08:04:30,365 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 08:04:30,365 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 08:04:30,368 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:04:30,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:04:30,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:30,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 08:04:30,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:04:30,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:04:30,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:04:30,809 INFO L857 garLoopResultBuilder]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-13 08:04:30,809 INFO L857 garLoopResultBuilder]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-13 08:04:30,809 INFO L857 garLoopResultBuilder]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-13 08:04:30,809 INFO L857 garLoopResultBuilder]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-13 08:04:30,809 INFO L857 garLoopResultBuilder]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-13 08:04:30,809 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-13 08:04:30,809 INFO L857 garLoopResultBuilder]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-13 08:04:30,809 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-13 08:04:30,809 INFO L857 garLoopResultBuilder]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-13 08:04:30,810 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-13 08:04:30,810 INFO L857 garLoopResultBuilder]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-13 08:04:30,810 INFO L857 garLoopResultBuilder]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-13 08:04:30,810 INFO L857 garLoopResultBuilder]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-13 08:04:30,810 INFO L857 garLoopResultBuilder]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-13 08:04:30,810 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-13 08:04:30,810 INFO L857 garLoopResultBuilder]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-13 08:04:30,810 INFO L857 garLoopResultBuilder]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-13 08:04:30,811 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-13 08:04:30,811 INFO L857 garLoopResultBuilder]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-13 08:04:30,812 INFO L857 garLoopResultBuilder]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-13 08:04:30,812 INFO L857 garLoopResultBuilder]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-13 08:04:30,813 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-13 08:04:30,813 INFO L857 garLoopResultBuilder]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-13 08:04:30,813 INFO L857 garLoopResultBuilder]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-13 08:04:30,813 INFO L857 garLoopResultBuilder]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-13 08:04:30,813 INFO L857 garLoopResultBuilder]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-13 08:04:30,813 INFO L857 garLoopResultBuilder]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-13 08:04:30,813 INFO L857 garLoopResultBuilder]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-13 08:04:30,814 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-13 08:04:30,814 INFO L857 garLoopResultBuilder]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-13 08:04:30,814 INFO L857 garLoopResultBuilder]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-13 08:04:30,814 INFO L857 garLoopResultBuilder]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-13 08:04:30,814 INFO L857 garLoopResultBuilder]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-13 08:04:30,814 INFO L857 garLoopResultBuilder]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-13 08:04:30,814 INFO L857 garLoopResultBuilder]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-13 08:04:30,814 INFO L857 garLoopResultBuilder]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-13 08:04:30,814 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 08:04:30,815 INFO L857 garLoopResultBuilder]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-13 08:04:30,815 INFO L857 garLoopResultBuilder]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-13 08:04:30,815 INFO L857 garLoopResultBuilder]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-13 08:04:30,821 INFO L853 garLoopResultBuilder]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse1 (= ~a17~0 1)) (.cse3 (<= 14 ~a8~0)) (.cse4 (<= ~a17~0 0)) (.cse0 (= ~a21~0 1)) (.cse2 (= ~a20~0 1))) (or (and .cse0 .cse1 .cse2) (and .cse3 .cse0 .cse1) (<= ~a21~0 0) (and .cse4 .cse3 .cse0) (and .cse4 .cse0 (<= ~a16~0 5)) (and .cse4 .cse0 .cse2))) [2021-10-13 08:04:30,821 INFO L857 garLoopResultBuilder]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-13 08:04:30,821 INFO L857 garLoopResultBuilder]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-13 08:04:30,821 INFO L857 garLoopResultBuilder]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-13 08:04:30,822 INFO L857 garLoopResultBuilder]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-13 08:04:30,822 INFO L857 garLoopResultBuilder]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-13 08:04:30,822 INFO L857 garLoopResultBuilder]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-13 08:04:30,822 INFO L857 garLoopResultBuilder]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-13 08:04:30,822 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 08:04:30,822 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-13 08:04:30,822 INFO L860 garLoopResultBuilder]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-13 08:04:30,823 INFO L857 garLoopResultBuilder]: For program point L554-1(lines 40 585) no Hoare annotation was computed. [2021-10-13 08:04:30,823 INFO L857 garLoopResultBuilder]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-13 08:04:30,823 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-13 08:04:30,823 INFO L857 garLoopResultBuilder]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-13 08:04:30,823 INFO L857 garLoopResultBuilder]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-13 08:04:30,823 INFO L857 garLoopResultBuilder]: For program point L557-1(lines 40 585) no Hoare annotation was computed. [2021-10-13 08:04:30,823 INFO L857 garLoopResultBuilder]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-13 08:04:30,824 INFO L857 garLoopResultBuilder]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-13 08:04:30,824 INFO L857 garLoopResultBuilder]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-13 08:04:30,824 INFO L857 garLoopResultBuilder]: For program point L558(line 558) no Hoare annotation was computed. [2021-10-13 08:04:30,824 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-13 08:04:30,824 INFO L857 garLoopResultBuilder]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-13 08:04:30,824 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-13 08:04:30,824 INFO L857 garLoopResultBuilder]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-13 08:04:30,825 INFO L857 garLoopResultBuilder]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-13 08:04:30,825 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-13 08:04:30,825 INFO L853 garLoopResultBuilder]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse1 (= ~a17~0 1)) (.cse3 (<= 14 ~a8~0)) (.cse4 (<= ~a17~0 0)) (.cse0 (= ~a21~0 1)) (.cse2 (= ~a20~0 1))) (or (and .cse0 .cse1 .cse2) (and .cse3 .cse0 .cse1) (<= ~a21~0 0) (and .cse4 .cse3 .cse0) (and .cse4 .cse0 (<= ~a16~0 5)) (and .cse4 .cse0 .cse2))) [2021-10-13 08:04:30,835 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-13 08:04:30,835 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 558) no Hoare annotation was computed. [2021-10-13 08:04:30,835 INFO L857 garLoopResultBuilder]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-13 08:04:30,836 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-13 08:04:30,836 INFO L857 garLoopResultBuilder]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-13 08:04:30,836 INFO L857 garLoopResultBuilder]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-13 08:04:30,836 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-13 08:04:30,836 INFO L857 garLoopResultBuilder]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-13 08:04:30,840 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:04:30,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:04:30 BoogieIcfgContainer [2021-10-13 08:04:30,867 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:04:30,868 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:04:30,868 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:04:30,868 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:04:30,869 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:19" (3/4) ... [2021-10-13 08:04:30,872 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 08:04:30,900 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 108 nodes and edges [2021-10-13 08:04:30,902 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-13 08:04:30,904 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-13 08:04:30,906 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 08:04:31,107 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 08:04:31,107 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:04:31,109 INFO L168 Benchmark]: Toolchain (without parser) took 14798.00 ms. Allocated memory was 107.0 MB in the beginning and 207.6 MB in the end (delta: 100.7 MB). Free memory was 63.8 MB in the beginning and 145.6 MB in the end (delta: -81.8 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:04:31,110 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 107.0 MB. Free memory is still 81.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:04:31,110 INFO L168 Benchmark]: CACSL2BoogieTranslator took 725.91 ms. Allocated memory is still 107.0 MB. Free memory was 63.6 MB in the beginning and 64.6 MB in the end (delta: -1.1 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:04:31,111 INFO L168 Benchmark]: Boogie Procedure Inliner took 115.28 ms. Allocated memory is still 107.0 MB. Free memory was 64.6 MB in the beginning and 58.7 MB in the end (delta: 5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 08:04:31,111 INFO L168 Benchmark]: Boogie Preprocessor took 91.21 ms. Allocated memory is still 107.0 MB. Free memory was 58.7 MB in the beginning and 54.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:04:31,112 INFO L168 Benchmark]: RCFGBuilder took 2177.61 ms. Allocated memory was 107.0 MB in the beginning and 136.3 MB in the end (delta: 29.4 MB). Free memory was 54.5 MB in the beginning and 65.9 MB in the end (delta: -11.4 MB). Peak memory consumption was 34.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:04:31,112 INFO L168 Benchmark]: TraceAbstraction took 11439.20 ms. Allocated memory was 136.3 MB in the beginning and 207.6 MB in the end (delta: 71.3 MB). Free memory was 65.9 MB in the beginning and 161.5 MB in the end (delta: -95.6 MB). Peak memory consumption was 89.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:04:31,113 INFO L168 Benchmark]: Witness Printer took 239.50 ms. Allocated memory is still 207.6 MB. Free memory was 161.5 MB in the beginning and 145.6 MB in the end (delta: 15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-13 08:04:31,116 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 107.0 MB. Free memory is still 81.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 725.91 ms. Allocated memory is still 107.0 MB. Free memory was 63.6 MB in the beginning and 64.6 MB in the end (delta: -1.1 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 115.28 ms. Allocated memory is still 107.0 MB. Free memory was 64.6 MB in the beginning and 58.7 MB in the end (delta: 5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 91.21 ms. Allocated memory is still 107.0 MB. Free memory was 58.7 MB in the beginning and 54.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2177.61 ms. Allocated memory was 107.0 MB in the beginning and 136.3 MB in the end (delta: 29.4 MB). Free memory was 54.5 MB in the beginning and 65.9 MB in the end (delta: -11.4 MB). Peak memory consumption was 34.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11439.20 ms. Allocated memory was 136.3 MB in the beginning and 207.6 MB in the end (delta: 71.3 MB). Free memory was 65.9 MB in the beginning and 161.5 MB in the end (delta: -95.6 MB). Peak memory consumption was 89.4 MB. Max. memory is 16.1 GB. * Witness Printer took 239.50 ms. Allocated memory is still 207.6 MB. Free memory was 161.5 MB in the beginning and 145.6 MB in the end (delta: 15.9 MB). Peak memory consumption was 16.8 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 558]: 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 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11337.8ms, OverallIterations: 10, TraceHistogramMax: 5, EmptinessCheckTime: 52.8ms, AutomataDifference: 3827.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 218.8ms, InitialAbstractionConstructionTime: 13.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 485 SDtfs, 428 SDslu, 38 SDs, 0 SdLazy, 2147 SolverSat, 533 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2660.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1095 GetRequests, 1073 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=997occurred in iteration=9, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 224.6ms AutomataMinimizationTime, 10 MinimizatonAttempts, 639 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 35 NumberOfFragments, 109 HoareAnnotationTreeSize, 3 FomulaSimplifications, 1362 FormulaSimplificationTreeSizeReduction, 48.4ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 162 FormulaSimplificationTreeSizeReductionInter, 161.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 186.6ms SsaConstructionTime, 649.7ms SatisfiabilityAnalysisTime, 4343.0ms InterpolantComputationTime, 1707 NumberOfCodeBlocks, 1707 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 2228 ConstructedInterpolants, 0 QuantifiedInterpolants, 4674 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1521 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 18 InterpolantComputations, 14 PerfectInterpolantSequences, 1306/1318 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: 593]: Loop Invariant Derived loop invariant: ((((((a21 == 1 && a17 == 1) && a20 == 1) || ((14 <= a8 && a21 == 1) && a17 == 1)) || a21 <= 0) || ((a17 <= 0 && 14 <= a8) && a21 == 1)) || ((a17 <= 0 && a21 == 1) && a16 <= 5)) || ((a17 <= 0 && a21 == 1) && a20 == 1) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((a21 == 1 && a17 == 1) && a20 == 1) || ((14 <= a8 && a21 == 1) && a17 == 1)) || a21 <= 0) || ((a17 <= 0 && 14 <= a8) && a21 == 1)) || ((a17 <= 0 && a21 == 1) && a16 <= 5)) || ((a17 <= 0 && a21 == 1) && a20 == 1) RESULT: Ultimate proved your program to be correct! [2021-10-13 08:04:31,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6da09dc-7b7f-43ed-a0e2-2ebab3d1a9a8/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...