./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5f3e3e9ccc5a5069122f9a5e86045d7e13172c8034d09d1e159c68b2e816764e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:36:10,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:36:10,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:36:10,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:36:10,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:36:10,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:36:10,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:36:10,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:36:10,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:36:10,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:36:10,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:36:10,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:36:10,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:36:10,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:36:10,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:36:10,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:36:10,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:36:10,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:36:10,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:36:10,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:36:10,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:36:10,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:36:10,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:36:10,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:36:10,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:36:10,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:36:10,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:36:10,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:36:10,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:36:10,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:36:10,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:36:10,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:36:10,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:36:10,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:36:10,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:36:10,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:36:10,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:36:10,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:36:10,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:36:10,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:36:10,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:36:10,262 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:36:10,323 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:36:10,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:36:10,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:36:10,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:36:10,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:36:10,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:36:10,337 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:36:10,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:36:10,337 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:36:10,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:36:10,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:36:10,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:36:10,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:36:10,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:36:10,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:36:10,341 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:36:10,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:36:10,341 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:36:10,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:36:10,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:36:10,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:36:10,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:36:10,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:36:10,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:36:10,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:36:10,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:36:10,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:36:10,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:36:10,345 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:36:10,347 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:36:10,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:36:10,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:36:10,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f3e3e9ccc5a5069122f9a5e86045d7e13172c8034d09d1e159c68b2e816764e [2021-11-22 15:36:10,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:36:10,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:36:10,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:36:10,741 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:36:10,742 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:36:10,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-11-22 15:36:10,826 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/data/899030a70/208dcd4176aa4f828a73a8ce7abe2f26/FLAG698879c4e [2021-11-22 15:36:11,868 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:36:11,870 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-11-22 15:36:11,913 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/data/899030a70/208dcd4176aa4f828a73a8ce7abe2f26/FLAG698879c4e [2021-11-22 15:36:12,245 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/data/899030a70/208dcd4176aa4f828a73a8ce7abe2f26 [2021-11-22 15:36:12,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:36:12,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:36:12,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:36:12,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:36:12,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:36:12,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:36:12" (1/1) ... [2021-11-22 15:36:12,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@691e08aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:12, skipping insertion in model container [2021-11-22 15:36:12,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:36:12" (1/1) ... [2021-11-22 15:36:12,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:36:12,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:36:13,046 WARN L230 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_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[6524,6537] [2021-11-22 15:36:13,124 WARN L230 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_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[13814,13827] [2021-11-22 15:36:14,268 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:36:14,280 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:36:14,347 WARN L230 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_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[6524,6537] [2021-11-22 15:36:14,373 WARN L230 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_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[13814,13827] [2021-11-22 15:36:15,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:36:15,276 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:36:15,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:15 WrapperNode [2021-11-22 15:36:15,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:36:15,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:36:15,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:36:15,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:36:15,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:15" (1/1) ... [2021-11-22 15:36:15,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:15" (1/1) ... [2021-11-22 15:36:15,805 INFO L137 Inliner]: procedures = 35, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 4974 [2021-11-22 15:36:15,805 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:36:15,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:36:15,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:36:15,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:36:15,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:15" (1/1) ... [2021-11-22 15:36:15,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:15" (1/1) ... [2021-11-22 15:36:15,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:15" (1/1) ... [2021-11-22 15:36:15,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:15" (1/1) ... [2021-11-22 15:36:16,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:15" (1/1) ... [2021-11-22 15:36:16,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:15" (1/1) ... [2021-11-22 15:36:16,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:15" (1/1) ... [2021-11-22 15:36:16,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:36:16,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:36:16,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:36:16,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:36:16,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:15" (1/1) ... [2021-11-22 15:36:16,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:36:16,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:36:16,664 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:36:16,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:36:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:36:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:36:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:36:16,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:36:16,970 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:36:16,996 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:36:22,524 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:36:22,561 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:36:22,562 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-22 15:36:22,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:36:22 BoogieIcfgContainer [2021-11-22 15:36:22,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:36:22,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:36:22,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:36:22,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:36:22,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:36:12" (1/3) ... [2021-11-22 15:36:22,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b8b810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:36:22, skipping insertion in model container [2021-11-22 15:36:22,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:15" (2/3) ... [2021-11-22 15:36:22,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b8b810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:36:22, skipping insertion in model container [2021-11-22 15:36:22,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:36:22" (3/3) ... [2021-11-22 15:36:22,577 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-11-22 15:36:22,584 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:36:22,585 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-22 15:36:22,671 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:36:22,684 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 15:36:22,685 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-22 15:36:22,741 INFO L276 IsEmpty]: Start isEmpty. Operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 15:36:22,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:22,770 INFO L514 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] [2021-11-22 15:36:22,770 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:22,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:22,777 INFO L85 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2021-11-22 15:36:22,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:22,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538327136] [2021-11-22 15:36:22,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:22,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:23,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:23,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538327136] [2021-11-22 15:36:23,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538327136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:23,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:23,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:36:23,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7481464] [2021-11-22 15:36:23,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:23,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 15:36:23,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:23,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 15:36:23,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:36:23,094 INFO L87 Difference]: Start difference. First operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 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 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:23,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:23,225 INFO L93 Difference]: Finished difference Result 1732 states and 3290 transitions. [2021-11-22 15:36:23,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 15:36:23,228 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 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 26 [2021-11-22 15:36:23,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:23,255 INFO L225 Difference]: With dead ends: 1732 [2021-11-22 15:36:23,255 INFO L226 Difference]: Without dead ends: 812 [2021-11-22 15:36:23,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:36:23,270 INFO L933 BasicCegarLoop]: 1597 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:23,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1597 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:36:23,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-11-22 15:36:23,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2021-11-22 15:36:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8925925925925926) internal successors, (1533), 811 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1533 transitions. [2021-11-22 15:36:23,417 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1533 transitions. Word has length 26 [2021-11-22 15:36:23,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:23,418 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1533 transitions. [2021-11-22 15:36:23,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:23,418 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1533 transitions. [2021-11-22 15:36:23,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 15:36:23,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:23,421 INFO L514 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] [2021-11-22 15:36:23,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:36:23,422 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:23,424 INFO L85 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2021-11-22 15:36:23,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:23,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461360458] [2021-11-22 15:36:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:23,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:23,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:23,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461360458] [2021-11-22 15:36:23,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461360458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:23,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:23,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:36:23,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428857782] [2021-11-22 15:36:23,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:23,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:36:23,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:23,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:36:23,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:36:23,625 INFO L87 Difference]: Start difference. First operand 812 states and 1533 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:23,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:23,803 INFO L93 Difference]: Finished difference Result 852 states and 1593 transitions. [2021-11-22 15:36:23,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:36:23,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 26 [2021-11-22 15:36:23,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:23,811 INFO L225 Difference]: With dead ends: 852 [2021-11-22 15:36:23,811 INFO L226 Difference]: Without dead ends: 812 [2021-11-22 15:36:23,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:36:23,819 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 3 mSDsluCounter, 4574 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6105 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:23,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6105 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:36:23,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-11-22 15:36:23,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2021-11-22 15:36:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8728395061728396) internal successors, (1517), 811 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:23,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1517 transitions. [2021-11-22 15:36:23,865 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1517 transitions. Word has length 26 [2021-11-22 15:36:23,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:23,866 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1517 transitions. [2021-11-22 15:36:23,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:23,866 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1517 transitions. [2021-11-22 15:36:23,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-22 15:36:23,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:23,876 INFO L514 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] [2021-11-22 15:36:23,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:36:23,879 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:23,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:23,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2021-11-22 15:36:23,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:23,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697134887] [2021-11-22 15:36:23,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:23,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:24,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:24,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697134887] [2021-11-22 15:36:24,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697134887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:24,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:24,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:36:24,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831210637] [2021-11-22 15:36:24,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:24,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:36:24,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:24,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:36:24,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:36:24,036 INFO L87 Difference]: Start difference. First operand 812 states and 1517 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:24,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:24,085 INFO L93 Difference]: Finished difference Result 878 states and 1619 transitions. [2021-11-22 15:36:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:36:24,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2021-11-22 15:36:24,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:24,093 INFO L225 Difference]: With dead ends: 878 [2021-11-22 15:36:24,093 INFO L226 Difference]: Without dead ends: 842 [2021-11-22 15:36:24,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:36:24,104 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 1485 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:24,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 1613 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:36:24,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-11-22 15:36:24,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 840. [2021-11-22 15:36:24,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 838 states have (on average 1.8627684964200477) internal successors, (1561), 839 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:24,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1561 transitions. [2021-11-22 15:36:24,142 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1561 transitions. Word has length 41 [2021-11-22 15:36:24,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:24,143 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1561 transitions. [2021-11-22 15:36:24,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:24,144 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1561 transitions. [2021-11-22 15:36:24,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-22 15:36:24,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:24,150 INFO L514 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] [2021-11-22 15:36:24,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 15:36:24,151 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:24,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:24,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2021-11-22 15:36:24,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:24,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105773587] [2021-11-22 15:36:24,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:24,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:24,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:24,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105773587] [2021-11-22 15:36:24,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105773587] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:24,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:24,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:36:24,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592747559] [2021-11-22 15:36:24,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:24,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:36:24,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:24,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:36:24,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:36:24,299 INFO L87 Difference]: Start difference. First operand 840 states and 1561 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:24,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:24,487 INFO L93 Difference]: Finished difference Result 1224 states and 2161 transitions. [2021-11-22 15:36:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:36:24,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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 41 [2021-11-22 15:36:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:24,497 INFO L225 Difference]: With dead ends: 1224 [2021-11-22 15:36:24,498 INFO L226 Difference]: Without dead ends: 1160 [2021-11-22 15:36:24,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:36:24,510 INFO L933 BasicCegarLoop]: 1511 mSDtfsCounter, 4709 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4709 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:24,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4709 Valid, 1779 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:36:24,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-11-22 15:36:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 902. [2021-11-22 15:36:24,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 900 states have (on average 1.84) internal successors, (1656), 901 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:24,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1656 transitions. [2021-11-22 15:36:24,563 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1656 transitions. Word has length 41 [2021-11-22 15:36:24,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:24,564 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 1656 transitions. [2021-11-22 15:36:24,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:24,565 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1656 transitions. [2021-11-22 15:36:24,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-22 15:36:24,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:24,567 INFO L514 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] [2021-11-22 15:36:24,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 15:36:24,568 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:24,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2021-11-22 15:36:24,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:24,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531903535] [2021-11-22 15:36:24,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:24,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:24,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:24,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531903535] [2021-11-22 15:36:24,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531903535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:24,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:24,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:36:24,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285218834] [2021-11-22 15:36:24,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:24,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:36:24,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:24,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:36:24,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:36:24,703 INFO L87 Difference]: Start difference. First operand 902 states and 1656 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:24,772 INFO L93 Difference]: Finished difference Result 1089 states and 1943 transitions. [2021-11-22 15:36:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:36:24,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 43 [2021-11-22 15:36:24,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:24,780 INFO L225 Difference]: With dead ends: 1089 [2021-11-22 15:36:24,781 INFO L226 Difference]: Without dead ends: 963 [2021-11-22 15:36:24,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:36:24,783 INFO L933 BasicCegarLoop]: 1514 mSDtfsCounter, 1469 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:24,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1469 Valid, 1565 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:36:24,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-22 15:36:24,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2021-11-22 15:36:24,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 959 states have (on average 1.8185610010427529) internal successors, (1744), 960 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1744 transitions. [2021-11-22 15:36:24,831 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1744 transitions. Word has length 43 [2021-11-22 15:36:24,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:24,834 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1744 transitions. [2021-11-22 15:36:24,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:24,839 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1744 transitions. [2021-11-22 15:36:24,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-22 15:36:24,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:24,841 INFO L514 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] [2021-11-22 15:36:24,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 15:36:24,841 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:24,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:24,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2021-11-22 15:36:24,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:24,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198843730] [2021-11-22 15:36:24,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:24,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:25,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:25,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198843730] [2021-11-22 15:36:25,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198843730] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:25,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:25,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:36:25,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468473175] [2021-11-22 15:36:25,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:25,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:36:25,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:25,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:36:25,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:36:25,032 INFO L87 Difference]: Start difference. First operand 961 states and 1744 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:25,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:25,178 INFO L93 Difference]: Finished difference Result 1146 states and 2026 transitions. [2021-11-22 15:36:25,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:36:25,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 43 [2021-11-22 15:36:25,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:25,188 INFO L225 Difference]: With dead ends: 1146 [2021-11-22 15:36:25,188 INFO L226 Difference]: Without dead ends: 963 [2021-11-22 15:36:25,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:36:25,191 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 3002 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3002 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:25,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3002 Valid, 1636 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:36:25,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-22 15:36:25,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2021-11-22 15:36:25,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 959 states have (on average 1.8154327424400416) internal successors, (1741), 960 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1741 transitions. [2021-11-22 15:36:25,300 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1741 transitions. Word has length 43 [2021-11-22 15:36:25,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:25,301 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1741 transitions. [2021-11-22 15:36:25,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:25,301 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1741 transitions. [2021-11-22 15:36:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-22 15:36:25,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:25,304 INFO L514 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] [2021-11-22 15:36:25,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 15:36:25,305 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:25,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:25,306 INFO L85 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2021-11-22 15:36:25,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:25,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665365191] [2021-11-22 15:36:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:25,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:25,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:25,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665365191] [2021-11-22 15:36:25,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665365191] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:25,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:25,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:36:25,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81114288] [2021-11-22 15:36:25,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:25,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:36:25,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:25,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:36:25,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:36:25,418 INFO L87 Difference]: Start difference. First operand 961 states and 1741 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:25,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:25,472 INFO L93 Difference]: Finished difference Result 1291 states and 2237 transitions. [2021-11-22 15:36:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:36:25,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 43 [2021-11-22 15:36:25,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:25,481 INFO L225 Difference]: With dead ends: 1291 [2021-11-22 15:36:25,482 INFO L226 Difference]: Without dead ends: 1108 [2021-11-22 15:36:25,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:36:25,484 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 1477 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:25,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1477 Valid, 1603 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:36:25,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-11-22 15:36:25,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1106. [2021-11-22 15:36:25,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1104 states have (on average 1.7681159420289856) internal successors, (1952), 1105 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1952 transitions. [2021-11-22 15:36:25,532 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1952 transitions. Word has length 43 [2021-11-22 15:36:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:25,533 INFO L470 AbstractCegarLoop]: Abstraction has 1106 states and 1952 transitions. [2021-11-22 15:36:25,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1952 transitions. [2021-11-22 15:36:25,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-22 15:36:25,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:25,534 INFO L514 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] [2021-11-22 15:36:25,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 15:36:25,535 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:25,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:25,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2021-11-22 15:36:25,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:25,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367841471] [2021-11-22 15:36:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:25,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:25,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:25,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367841471] [2021-11-22 15:36:25,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367841471] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:25,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:25,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:36:25,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578387] [2021-11-22 15:36:25,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:25,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:36:25,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:25,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:36:25,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:36:25,596 INFO L87 Difference]: Start difference. First operand 1106 states and 1952 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:25,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:25,660 INFO L93 Difference]: Finished difference Result 1690 states and 2810 transitions. [2021-11-22 15:36:25,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:36:25,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 43 [2021-11-22 15:36:25,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:25,671 INFO L225 Difference]: With dead ends: 1690 [2021-11-22 15:36:25,671 INFO L226 Difference]: Without dead ends: 1362 [2021-11-22 15:36:25,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:36:25,674 INFO L933 BasicCegarLoop]: 1554 mSDtfsCounter, 1481 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:25,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 1612 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:36:25,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-11-22 15:36:25,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1360. [2021-11-22 15:36:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1358 states have (on average 1.6995581737849779) internal successors, (2308), 1359 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:25,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2308 transitions. [2021-11-22 15:36:25,739 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2308 transitions. Word has length 43 [2021-11-22 15:36:25,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:25,740 INFO L470 AbstractCegarLoop]: Abstraction has 1360 states and 2308 transitions. [2021-11-22 15:36:25,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:25,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2308 transitions. [2021-11-22 15:36:25,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-22 15:36:25,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:25,741 INFO L514 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] [2021-11-22 15:36:25,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 15:36:25,741 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:25,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:25,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2021-11-22 15:36:25,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:25,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807813209] [2021-11-22 15:36:25,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:25,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:25,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:25,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807813209] [2021-11-22 15:36:25,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807813209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:25,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:25,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:36:25,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843760979] [2021-11-22 15:36:25,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:25,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:36:25,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:25,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:36:25,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:36:25,832 INFO L87 Difference]: Start difference. First operand 1360 states and 2308 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:25,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:25,981 INFO L93 Difference]: Finished difference Result 1883 states and 3036 transitions. [2021-11-22 15:36:25,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:36:25,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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 44 [2021-11-22 15:36:25,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:26,002 INFO L225 Difference]: With dead ends: 1883 [2021-11-22 15:36:26,002 INFO L226 Difference]: Without dead ends: 1881 [2021-11-22 15:36:26,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:36:26,007 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 139 mSDsluCounter, 4544 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 6078 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:26,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 6078 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:36:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2021-11-22 15:36:26,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1408. [2021-11-22 15:36:26,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1406 states have (on average 1.6728307254623045) internal successors, (2352), 1407 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:26,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2352 transitions. [2021-11-22 15:36:26,101 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2352 transitions. Word has length 44 [2021-11-22 15:36:26,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:26,101 INFO L470 AbstractCegarLoop]: Abstraction has 1408 states and 2352 transitions. [2021-11-22 15:36:26,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:26,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2352 transitions. [2021-11-22 15:36:26,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-22 15:36:26,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:26,103 INFO L514 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] [2021-11-22 15:36:26,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 15:36:26,104 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:26,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:26,110 INFO L85 PathProgramCache]: Analyzing trace with hash -523945775, now seen corresponding path program 1 times [2021-11-22 15:36:26,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:26,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606301435] [2021-11-22 15:36:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:26,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:26,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:26,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606301435] [2021-11-22 15:36:26,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606301435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:26,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:26,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:36:26,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122767242] [2021-11-22 15:36:26,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:26,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:36:26,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:26,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:36:26,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:36:26,261 INFO L87 Difference]: Start difference. First operand 1408 states and 2352 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:35,425 INFO L93 Difference]: Finished difference Result 3663 states and 6661 transitions. [2021-11-22 15:36:35,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:36:35,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2021-11-22 15:36:35,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:35,448 INFO L225 Difference]: With dead ends: 3663 [2021-11-22 15:36:35,448 INFO L226 Difference]: Without dead ends: 2910 [2021-11-22 15:36:35,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:36:35,451 INFO L933 BasicCegarLoop]: 753 mSDtfsCounter, 2335 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5354 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2335 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 6515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 5354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:35,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2335 Valid, 771 Invalid, 6515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1161 Valid, 5354 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2021-11-22 15:36:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-11-22 15:36:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2910. [2021-11-22 15:36:35,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2910 states, 2908 states have (on average 1.5357634112792298) internal successors, (4466), 2909 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:35,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2910 states to 2910 states and 4466 transitions. [2021-11-22 15:36:35,617 INFO L78 Accepts]: Start accepts. Automaton has 2910 states and 4466 transitions. Word has length 63 [2021-11-22 15:36:35,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:35,619 INFO L470 AbstractCegarLoop]: Abstraction has 2910 states and 4466 transitions. [2021-11-22 15:36:35,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:35,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2910 states and 4466 transitions. [2021-11-22 15:36:35,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-22 15:36:35,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:35,622 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 15:36:35,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 15:36:35,622 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:35,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:35,623 INFO L85 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2021-11-22 15:36:35,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:35,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129452124] [2021-11-22 15:36:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:35,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 15:36:35,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:35,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129452124] [2021-11-22 15:36:35,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129452124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:35,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:35,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:36:35,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231004271] [2021-11-22 15:36:35,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:35,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:36:35,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:35,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:36:35,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:36:35,738 INFO L87 Difference]: Start difference. First operand 2910 states and 4466 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:36,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:36,058 INFO L93 Difference]: Finished difference Result 4938 states and 7314 transitions. [2021-11-22 15:36:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:36:36,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 64 [2021-11-22 15:36:36,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:36,092 INFO L225 Difference]: With dead ends: 4938 [2021-11-22 15:36:36,092 INFO L226 Difference]: Without dead ends: 4308 [2021-11-22 15:36:36,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:36:36,096 INFO L933 BasicCegarLoop]: 1563 mSDtfsCounter, 3073 mSDsluCounter, 1621 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3073 SdHoareTripleChecker+Valid, 3184 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:36,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3073 Valid, 3184 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:36:36,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4308 states. [2021-11-22 15:36:36,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4308 to 3538. [2021-11-22 15:36:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3536 states have (on average 1.5107466063348416) internal successors, (5342), 3537 states have internal predecessors, (5342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 5342 transitions. [2021-11-22 15:36:36,340 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 5342 transitions. Word has length 64 [2021-11-22 15:36:36,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:36,341 INFO L470 AbstractCegarLoop]: Abstraction has 3538 states and 5342 transitions. [2021-11-22 15:36:36,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:36,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 5342 transitions. [2021-11-22 15:36:36,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-22 15:36:36,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:36,343 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 15:36:36,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 15:36:36,344 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:36,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:36,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2021-11-22 15:36:36,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:36,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116497966] [2021-11-22 15:36:36,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:36,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 15:36:36,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:36,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116497966] [2021-11-22 15:36:36,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116497966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:36,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:36,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:36:36,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479062179] [2021-11-22 15:36:36,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:36,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:36:36,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:36,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:36:36,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:36:36,453 INFO L87 Difference]: Start difference. First operand 3538 states and 5342 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:36,835 INFO L93 Difference]: Finished difference Result 5566 states and 8190 transitions. [2021-11-22 15:36:36,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:36:36,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 64 [2021-11-22 15:36:36,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:36,873 INFO L225 Difference]: With dead ends: 5566 [2021-11-22 15:36:36,873 INFO L226 Difference]: Without dead ends: 4936 [2021-11-22 15:36:36,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:36:36,879 INFO L933 BasicCegarLoop]: 1564 mSDtfsCounter, 3067 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3067 SdHoareTripleChecker+Valid, 3203 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:36,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3067 Valid, 3203 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:36:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4936 states. [2021-11-22 15:36:37,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4936 to 4482. [2021-11-22 15:36:37,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4482 states, 4480 states have (on average 1.4834821428571427) internal successors, (6646), 4481 states have internal predecessors, (6646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4482 states to 4482 states and 6646 transitions. [2021-11-22 15:36:37,216 INFO L78 Accepts]: Start accepts. Automaton has 4482 states and 6646 transitions. Word has length 64 [2021-11-22 15:36:37,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:37,216 INFO L470 AbstractCegarLoop]: Abstraction has 4482 states and 6646 transitions. [2021-11-22 15:36:37,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:37,217 INFO L276 IsEmpty]: Start isEmpty. Operand 4482 states and 6646 transitions. [2021-11-22 15:36:37,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-22 15:36:37,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:37,219 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 15:36:37,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 15:36:37,219 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:37,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:37,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2021-11-22 15:36:37,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:37,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723082020] [2021-11-22 15:36:37,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:37,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:36:37,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:37,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723082020] [2021-11-22 15:36:37,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723082020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:37,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:37,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:36:37,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279317445] [2021-11-22 15:36:37,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:37,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:36:37,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:37,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:36:37,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:36:37,363 INFO L87 Difference]: Start difference. First operand 4482 states and 6646 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:37,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:37,767 INFO L93 Difference]: Finished difference Result 5834 states and 8570 transitions. [2021-11-22 15:36:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:36:37,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 64 [2021-11-22 15:36:37,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:37,809 INFO L225 Difference]: With dead ends: 5834 [2021-11-22 15:36:37,818 INFO L226 Difference]: Without dead ends: 5384 [2021-11-22 15:36:37,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:36:37,823 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 3066 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3066 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:37,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3066 Valid, 3181 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:36:37,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5384 states. [2021-11-22 15:36:38,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5384 to 4930. [2021-11-22 15:36:38,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4930 states, 4928 states have (on average 1.4768668831168832) internal successors, (7278), 4929 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 7278 transitions. [2021-11-22 15:36:38,177 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 7278 transitions. Word has length 64 [2021-11-22 15:36:38,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:38,177 INFO L470 AbstractCegarLoop]: Abstraction has 4930 states and 7278 transitions. [2021-11-22 15:36:38,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 7278 transitions. [2021-11-22 15:36:38,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-22 15:36:38,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:38,187 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 15:36:38,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 15:36:38,188 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:38,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:38,188 INFO L85 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2021-11-22 15:36:38,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:38,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848530311] [2021-11-22 15:36:38,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:38,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:38,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:38,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848530311] [2021-11-22 15:36:38,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848530311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:38,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:38,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:36:38,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252048481] [2021-11-22 15:36:38,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:38,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:36:38,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:38,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:36:38,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:36:38,260 INFO L87 Difference]: Start difference. First operand 4930 states and 7278 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:38,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:38,505 INFO L93 Difference]: Finished difference Result 7582 states and 10980 transitions. [2021-11-22 15:36:38,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:36:38,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2021-11-22 15:36:38,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:38,519 INFO L225 Difference]: With dead ends: 7582 [2021-11-22 15:36:38,520 INFO L226 Difference]: Without dead ends: 4932 [2021-11-22 15:36:38,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:36:38,526 INFO L933 BasicCegarLoop]: 1538 mSDtfsCounter, 33 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:38,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 3042 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:36:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4932 states. [2021-11-22 15:36:38,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 4930. [2021-11-22 15:36:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4930 states, 4928 states have (on average 1.4667207792207793) internal successors, (7228), 4929 states have internal predecessors, (7228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:38,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 7228 transitions. [2021-11-22 15:36:38,803 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 7228 transitions. Word has length 65 [2021-11-22 15:36:38,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:38,804 INFO L470 AbstractCegarLoop]: Abstraction has 4930 states and 7228 transitions. [2021-11-22 15:36:38,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:38,804 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 7228 transitions. [2021-11-22 15:36:38,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-22 15:36:38,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:38,806 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 15:36:38,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 15:36:38,807 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:38,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:38,808 INFO L85 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2021-11-22 15:36:38,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:38,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603487784] [2021-11-22 15:36:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:38,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:38,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:38,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603487784] [2021-11-22 15:36:38,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603487784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:38,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:38,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:36:38,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210235137] [2021-11-22 15:36:38,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:38,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:36:38,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:38,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:36:38,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:36:38,877 INFO L87 Difference]: Start difference. First operand 4930 states and 7228 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:39,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:39,032 INFO L93 Difference]: Finished difference Result 6258 states and 9055 transitions. [2021-11-22 15:36:39,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:36:39,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2021-11-22 15:36:39,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:39,043 INFO L225 Difference]: With dead ends: 6258 [2021-11-22 15:36:39,044 INFO L226 Difference]: Without dead ends: 3608 [2021-11-22 15:36:39,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:36:39,053 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 29 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:39,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 3027 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:36:39,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2021-11-22 15:36:39,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 3606. [2021-11-22 15:36:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3604 states have (on average 1.4922308546059933) internal successors, (5378), 3605 states have internal predecessors, (5378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 5378 transitions. [2021-11-22 15:36:39,297 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 5378 transitions. Word has length 65 [2021-11-22 15:36:39,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:39,298 INFO L470 AbstractCegarLoop]: Abstraction has 3606 states and 5378 transitions. [2021-11-22 15:36:39,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:39,298 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 5378 transitions. [2021-11-22 15:36:39,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-22 15:36:39,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:39,300 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:36:39,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 15:36:39,301 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:39,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:39,302 INFO L85 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2021-11-22 15:36:39,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:39,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120217422] [2021-11-22 15:36:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:39,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:39,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:39,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120217422] [2021-11-22 15:36:39,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120217422] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:36:39,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751341006] [2021-11-22 15:36:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:39,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:36:39,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:36:39,713 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:36:39,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:36:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:39,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 15:36:39,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:36:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:36:40,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:36:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:36:40,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751341006] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:36:40,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:36:40,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-11-22 15:36:40,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489939379] [2021-11-22 15:36:40,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:36:40,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 15:36:40,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:40,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 15:36:40,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-22 15:36:40,739 INFO L87 Difference]: Start difference. First operand 3606 states and 5378 transitions. Second operand has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 18 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:47,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:47,423 INFO L93 Difference]: Finished difference Result 16507 states and 22611 transitions. [2021-11-22 15:36:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-22 15:36:47,423 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 18 states have internal predecessors, (178), 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 65 [2021-11-22 15:36:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:47,465 INFO L225 Difference]: With dead ends: 16507 [2021-11-22 15:36:47,465 INFO L226 Difference]: Without dead ends: 15181 [2021-11-22 15:36:47,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4315 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2151, Invalid=9405, Unknown=0, NotChecked=0, Total=11556 [2021-11-22 15:36:47,479 INFO L933 BasicCegarLoop]: 1596 mSDtfsCounter, 12273 mSDsluCounter, 5489 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12273 SdHoareTripleChecker+Valid, 7085 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:47,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12273 Valid, 7085 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-22 15:36:47,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15181 states. [2021-11-22 15:36:48,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15181 to 8768. [2021-11-22 15:36:48,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8768 states, 8766 states have (on average 1.380333105179101) internal successors, (12100), 8767 states have internal predecessors, (12100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:48,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8768 states to 8768 states and 12100 transitions. [2021-11-22 15:36:48,244 INFO L78 Accepts]: Start accepts. Automaton has 8768 states and 12100 transitions. Word has length 65 [2021-11-22 15:36:48,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:48,245 INFO L470 AbstractCegarLoop]: Abstraction has 8768 states and 12100 transitions. [2021-11-22 15:36:48,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 18 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:48,245 INFO L276 IsEmpty]: Start isEmpty. Operand 8768 states and 12100 transitions. [2021-11-22 15:36:48,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-22 15:36:48,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:48,248 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:36:48,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:36:48,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-22 15:36:48,474 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:48,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:48,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1505794396, now seen corresponding path program 1 times [2021-11-22 15:36:48,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:48,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916361247] [2021-11-22 15:36:48,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:48,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:48,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:48,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916361247] [2021-11-22 15:36:48,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916361247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:36:48,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445341093] [2021-11-22 15:36:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:48,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:36:48,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:36:48,762 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:36:48,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:36:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 15:36:48,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:36:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:49,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:36:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:50,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445341093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:36:50,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:36:50,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-11-22 15:36:50,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187268877] [2021-11-22 15:36:50,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:36:50,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-22 15:36:50,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:50,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-22 15:36:50,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-22 15:36:50,755 INFO L87 Difference]: Start difference. First operand 8768 states and 12100 transitions. Second operand has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:53,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:53,466 INFO L93 Difference]: Finished difference Result 29635 states and 39119 transitions. [2021-11-22 15:36:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-22 15:36:53,467 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 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 66 [2021-11-22 15:36:53,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:53,529 INFO L225 Difference]: With dead ends: 29635 [2021-11-22 15:36:53,530 INFO L226 Difference]: Without dead ends: 24816 [2021-11-22 15:36:53,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=355, Invalid=1051, Unknown=0, NotChecked=0, Total=1406 [2021-11-22 15:36:53,547 INFO L933 BasicCegarLoop]: 1535 mSDtfsCounter, 9506 mSDsluCounter, 4955 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9506 SdHoareTripleChecker+Valid, 6490 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:53,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9506 Valid, 6490 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 15:36:53,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24816 states. [2021-11-22 15:36:54,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24816 to 16479. [2021-11-22 15:36:54,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16479 states, 16477 states have (on average 1.3413849608545245) internal successors, (22102), 16478 states have internal predecessors, (22102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:54,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16479 states to 16479 states and 22102 transitions. [2021-11-22 15:36:54,905 INFO L78 Accepts]: Start accepts. Automaton has 16479 states and 22102 transitions. Word has length 66 [2021-11-22 15:36:54,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:54,905 INFO L470 AbstractCegarLoop]: Abstraction has 16479 states and 22102 transitions. [2021-11-22 15:36:54,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:54,906 INFO L276 IsEmpty]: Start isEmpty. Operand 16479 states and 22102 transitions. [2021-11-22 15:36:54,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-22 15:36:54,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:54,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:36:54,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:36:55,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-22 15:36:55,122 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:55,122 INFO L85 PathProgramCache]: Analyzing trace with hash 616171932, now seen corresponding path program 1 times [2021-11-22 15:36:55,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:55,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126806562] [2021-11-22 15:36:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:55,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:55,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:55,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126806562] [2021-11-22 15:36:55,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126806562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:36:55,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473030678] [2021-11-22 15:36:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:55,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:36:55,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:36:55,304 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:36:55,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:36:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:55,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-22 15:36:55,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:36:57,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:57,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:36:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:58,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473030678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:36:58,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:36:58,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 32 [2021-11-22 15:36:58,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029561550] [2021-11-22 15:36:58,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:36:58,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-22 15:36:58,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:58,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-22 15:36:58,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-11-22 15:36:58,479 INFO L87 Difference]: Start difference. First operand 16479 states and 22102 transitions. Second operand has 32 states, 32 states have (on average 5.5625) internal successors, (178), 32 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:38:30,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:38:30,461 INFO L93 Difference]: Finished difference Result 249794 states and 323095 transitions. [2021-11-22 15:38:30,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2021-11-22 15:38:30,462 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.5625) internal successors, (178), 32 states have internal predecessors, (178), 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 66 [2021-11-22 15:38:30,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:38:31,263 INFO L225 Difference]: With dead ends: 249794 [2021-11-22 15:38:31,264 INFO L226 Difference]: Without dead ends: 235595 [2021-11-22 15:38:31,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 639 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208473 ImplicationChecksByTransitivity, 58.9s TimeCoverageRelationStatistics Valid=46191, Invalid=364049, Unknown=0, NotChecked=0, Total=410240 [2021-11-22 15:38:31,462 INFO L933 BasicCegarLoop]: 1636 mSDtfsCounter, 22282 mSDsluCounter, 16977 mSDsCounter, 0 mSdLazyCounter, 3677 mSolverCounterSat, 1589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22282 SdHoareTripleChecker+Valid, 18613 SdHoareTripleChecker+Invalid, 5266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1589 IncrementalHoareTripleChecker+Valid, 3677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:38:31,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22282 Valid, 18613 Invalid, 5266 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1589 Valid, 3677 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-22 15:38:31,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235595 states. [2021-11-22 15:38:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235595 to 44059. [2021-11-22 15:38:39,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44059 states, 44057 states have (on average 1.3152506979594616) internal successors, (57946), 44058 states have internal predecessors, (57946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:38:39,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44059 states to 44059 states and 57946 transitions. [2021-11-22 15:38:39,409 INFO L78 Accepts]: Start accepts. Automaton has 44059 states and 57946 transitions. Word has length 66 [2021-11-22 15:38:39,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:38:39,409 INFO L470 AbstractCegarLoop]: Abstraction has 44059 states and 57946 transitions. [2021-11-22 15:38:39,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.5625) internal successors, (178), 32 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:38:39,409 INFO L276 IsEmpty]: Start isEmpty. Operand 44059 states and 57946 transitions. [2021-11-22 15:38:39,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-22 15:38:39,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:38:39,411 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:38:39,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-22 15:38:39,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-22 15:38:39,613 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:38:39,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:38:39,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2021-11-22 15:38:39,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:38:39,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896983485] [2021-11-22 15:38:39,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:38:39,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:38:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:38:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:38:39,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:38:39,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896983485] [2021-11-22 15:38:39,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896983485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:38:39,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:38:39,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:38:39,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258707077] [2021-11-22 15:38:39,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:38:39,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:38:39,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:38:39,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:38:39,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:38:39,689 INFO L87 Difference]: Start difference. First operand 44059 states and 57946 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:38:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:38:43,706 INFO L93 Difference]: Finished difference Result 69904 states and 91413 transitions. [2021-11-22 15:38:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:38:43,707 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 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 66 [2021-11-22 15:38:43,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:38:43,752 INFO L225 Difference]: With dead ends: 69904 [2021-11-22 15:38:43,753 INFO L226 Difference]: Without dead ends: 28125 [2021-11-22 15:38:43,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:38:43,792 INFO L933 BasicCegarLoop]: 1504 mSDtfsCounter, 4540 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4540 SdHoareTripleChecker+Valid, 2977 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:38:43,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4540 Valid, 2977 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:38:43,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28125 states. [2021-11-22 15:38:47,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28125 to 28125. [2021-11-22 15:38:47,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28125 states, 28123 states have (on average 1.2919674287949365) internal successors, (36334), 28124 states have internal predecessors, (36334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:38:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28125 states to 28125 states and 36334 transitions. [2021-11-22 15:38:47,602 INFO L78 Accepts]: Start accepts. Automaton has 28125 states and 36334 transitions. Word has length 66 [2021-11-22 15:38:47,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:38:47,602 INFO L470 AbstractCegarLoop]: Abstraction has 28125 states and 36334 transitions. [2021-11-22 15:38:47,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:38:47,603 INFO L276 IsEmpty]: Start isEmpty. Operand 28125 states and 36334 transitions. [2021-11-22 15:38:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-22 15:38:47,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:38:47,604 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:38:47,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-22 15:38:47,604 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:38:47,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:38:47,604 INFO L85 PathProgramCache]: Analyzing trace with hash 138650479, now seen corresponding path program 1 times [2021-11-22 15:38:47,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:38:47,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358778159] [2021-11-22 15:38:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:38:47,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:38:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:38:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:38:47,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:38:47,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358778159] [2021-11-22 15:38:47,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358778159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:38:47,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599449967] [2021-11-22 15:38:47,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:38:47,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:38:47,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:38:47,998 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:38:48,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01c289b4-83ef-4ba5-bcab-b0555cbec4d2/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:38:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:38:48,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-22 15:38:48,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:38:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:38:50,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:38:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:38:51,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599449967] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:38:51,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:38:51,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 14] total 38 [2021-11-22 15:38:51,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113458834] [2021-11-22 15:38:51,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:38:51,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-22 15:38:51,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:38:51,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-22 15:38:51,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2021-11-22 15:38:51,593 INFO L87 Difference]: Start difference. First operand 28125 states and 36334 transitions. Second operand has 38 states, 38 states have (on average 4.815789473684211) internal successors, (183), 38 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:39:31,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:39:31,917 INFO L93 Difference]: Finished difference Result 107595 states and 134342 transitions. [2021-11-22 15:39:31,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2021-11-22 15:39:31,917 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.815789473684211) internal successors, (183), 38 states have internal predecessors, (183), 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 67 [2021-11-22 15:39:31,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:39:32,085 INFO L225 Difference]: With dead ends: 107595 [2021-11-22 15:39:32,085 INFO L226 Difference]: Without dead ends: 88913 [2021-11-22 15:39:32,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22417 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=6372, Invalid=54884, Unknown=0, NotChecked=0, Total=61256 [2021-11-22 15:39:32,127 INFO L933 BasicCegarLoop]: 2062 mSDtfsCounter, 19429 mSDsluCounter, 31863 mSDsCounter, 0 mSdLazyCounter, 3605 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19429 SdHoareTripleChecker+Valid, 33925 SdHoareTripleChecker+Invalid, 4104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 3605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-22 15:39:32,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19429 Valid, 33925 Invalid, 4104 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [499 Valid, 3605 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-22 15:39:32,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88913 states.