./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.04.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.04.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1de07d37d630bd073064bf436fb9512b72ab982b0eaf3fcb1582f689c57482fa --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:12:38,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:12:38,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:12:38,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:12:38,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:12:38,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:12:38,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:12:38,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:12:38,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:12:38,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:12:38,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:12:38,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:12:38,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:12:38,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:12:38,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:12:38,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:12:38,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:12:38,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:12:38,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:12:38,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:12:38,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:12:38,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:12:38,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:12:38,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:12:38,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:12:38,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:12:38,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:12:38,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:12:38,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:12:38,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:12:38,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:12:38,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:12:38,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:12:38,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:12:38,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:12:38,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:12:38,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:12:38,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:12:38,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:12:38,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:12:38,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:12:38,201 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:12:38,225 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:12:38,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:12:38,226 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:12:38,226 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:12:38,227 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:12:38,227 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:12:38,228 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:12:38,228 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:12:38,228 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:12:38,228 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:12:38,228 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:12:38,229 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:12:38,229 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:12:38,229 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:12:38,229 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:12:38,230 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:12:38,230 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:12:38,230 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:12:38,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:12:38,231 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:12:38,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:12:38,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:12:38,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:12:38,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:12:38,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:12:38,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:12:38,233 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:12:38,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:12:38,233 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:12:38,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:12:38,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:12:38,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:12:38,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:12:38,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:12:38,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:12:38,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:12:38,235 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:12:38,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:12:38,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:12:38,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:12:38,236 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:12:38,236 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1de07d37d630bd073064bf436fb9512b72ab982b0eaf3fcb1582f689c57482fa [2021-11-20 23:12:38,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:12:38,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:12:38,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:12:38,563 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:12:38,564 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:12:38,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/systemc/transmitter.04.cil.c [2021-11-20 23:12:38,638 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/data/e06287efe/180cc666c7b349d7a6378ba5759e7bc0/FLAG0b66c9c63 [2021-11-20 23:12:39,112 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:12:39,112 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/sv-benchmarks/c/systemc/transmitter.04.cil.c [2021-11-20 23:12:39,126 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/data/e06287efe/180cc666c7b349d7a6378ba5759e7bc0/FLAG0b66c9c63 [2021-11-20 23:12:39,471 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/data/e06287efe/180cc666c7b349d7a6378ba5759e7bc0 [2021-11-20 23:12:39,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:12:39,475 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:12:39,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:12:39,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:12:39,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:12:39,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:39" (1/1) ... [2021-11-20 23:12:39,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b787b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:39, skipping insertion in model container [2021-11-20 23:12:39,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:39" (1/1) ... [2021-11-20 23:12:39,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:12:39,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:12:39,723 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_c8b43214-b0ee-4165-97b1-73432e0bc908/sv-benchmarks/c/systemc/transmitter.04.cil.c[706,719] [2021-11-20 23:12:39,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:12:39,812 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:12:39,823 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_c8b43214-b0ee-4165-97b1-73432e0bc908/sv-benchmarks/c/systemc/transmitter.04.cil.c[706,719] [2021-11-20 23:12:39,859 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:12:39,874 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:12:39,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:39 WrapperNode [2021-11-20 23:12:39,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:12:39,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:12:39,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:12:39,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:12:39,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:39" (1/1) ... [2021-11-20 23:12:39,894 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:39" (1/1) ... [2021-11-20 23:12:39,930 INFO L137 Inliner]: procedures = 36, calls = 42, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 378 [2021-11-20 23:12:39,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:12:39,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:12:39,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:12:39,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:12:39,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:39" (1/1) ... [2021-11-20 23:12:39,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:39" (1/1) ... [2021-11-20 23:12:39,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:39" (1/1) ... [2021-11-20 23:12:39,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:39" (1/1) ... [2021-11-20 23:12:39,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:39" (1/1) ... [2021-11-20 23:12:39,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:39" (1/1) ... [2021-11-20 23:12:39,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:39" (1/1) ... [2021-11-20 23:12:39,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:12:39,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:12:39,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:12:39,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:12:39,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:39" (1/1) ... [2021-11-20 23:12:40,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:12:40,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:12:40,043 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:12:40,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:12:40,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:12:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-20 23:12:40,102 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-20 23:12:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-20 23:12:40,102 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-20 23:12:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-20 23:12:40,102 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-20 23:12:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-20 23:12:40,103 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-20 23:12:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-20 23:12:40,103 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-20 23:12:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:12:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-20 23:12:40,103 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-20 23:12:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:12:40,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:12:40,217 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:12:40,230 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:12:40,672 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:12:40,890 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:12:40,891 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-20 23:12:40,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:12:40 BoogieIcfgContainer [2021-11-20 23:12:40,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:12:40,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:12:40,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:12:40,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:12:40,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:12:39" (1/3) ... [2021-11-20 23:12:40,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5e5dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:12:40, skipping insertion in model container [2021-11-20 23:12:40,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:39" (2/3) ... [2021-11-20 23:12:40,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5e5dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:12:40, skipping insertion in model container [2021-11-20 23:12:40,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:12:40" (3/3) ... [2021-11-20 23:12:40,904 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.04.cil.c [2021-11-20 23:12:40,913 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:12:40,913 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:12:40,970 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:12:40,976 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:12:40,976 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:12:40,996 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 75 states have internal predecessors, (111), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-20 23:12:41,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 23:12:41,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:41,005 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] [2021-11-20 23:12:41,006 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:41,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:41,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2018350875, now seen corresponding path program 1 times [2021-11-20 23:12:41,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:41,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174282479] [2021-11-20 23:12:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:41,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:41,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:41,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174282479] [2021-11-20 23:12:41,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174282479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:41,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:41,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:12:41,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677698373] [2021-11-20 23:12:41,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:41,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:12:41,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:41,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:12:41,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:12:41,370 INFO L87 Difference]: Start difference. First operand has 98 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 75 states have internal predecessors, (111), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:12:41,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:41,736 INFO L93 Difference]: Finished difference Result 281 states and 422 transitions. [2021-11-20 23:12:41,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:12:41,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2021-11-20 23:12:41,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:41,748 INFO L225 Difference]: With dead ends: 281 [2021-11-20 23:12:41,749 INFO L226 Difference]: Without dead ends: 184 [2021-11-20 23:12:41,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:12:41,756 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 243 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:41,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 354 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:12:41,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-20 23:12:41,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2021-11-20 23:12:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 137 states have (on average 1.437956204379562) internal successors, (197), 139 states have internal predecessors, (197), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 23:12:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 257 transitions. [2021-11-20 23:12:41,823 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 257 transitions. Word has length 45 [2021-11-20 23:12:41,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:41,824 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 257 transitions. [2021-11-20 23:12:41,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:12:41,824 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 257 transitions. [2021-11-20 23:12:41,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 23:12:41,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:41,827 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] [2021-11-20 23:12:41,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:12:41,828 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:41,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:41,829 INFO L85 PathProgramCache]: Analyzing trace with hash -966901786, now seen corresponding path program 1 times [2021-11-20 23:12:41,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:41,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870018948] [2021-11-20 23:12:41,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:41,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:41,952 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:41,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870018948] [2021-11-20 23:12:41,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870018948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:41,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:41,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:12:41,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117594980] [2021-11-20 23:12:41,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:41,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:12:41,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:41,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:12:41,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:12:41,956 INFO L87 Difference]: Start difference. First operand 180 states and 257 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:12:42,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:42,550 INFO L93 Difference]: Finished difference Result 1021 states and 1523 transitions. [2021-11-20 23:12:42,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:12:42,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2021-11-20 23:12:42,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:42,575 INFO L225 Difference]: With dead ends: 1021 [2021-11-20 23:12:42,575 INFO L226 Difference]: Without dead ends: 846 [2021-11-20 23:12:42,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:12:42,589 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 519 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:42,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 575 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:12:42,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-11-20 23:12:42,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 810. [2021-11-20 23:12:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 627 states have (on average 1.4242424242424243) internal successors, (893), 635 states have internal predecessors, (893), 122 states have call successors, (122), 60 states have call predecessors, (122), 60 states have return successors, (172), 115 states have call predecessors, (172), 122 states have call successors, (172) [2021-11-20 23:12:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1187 transitions. [2021-11-20 23:12:42,727 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1187 transitions. Word has length 45 [2021-11-20 23:12:42,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:42,729 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 1187 transitions. [2021-11-20 23:12:42,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:12:42,729 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1187 transitions. [2021-11-20 23:12:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 23:12:42,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:42,738 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] [2021-11-20 23:12:42,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:12:42,739 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:42,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:42,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1938576473, now seen corresponding path program 1 times [2021-11-20 23:12:42,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:42,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870907109] [2021-11-20 23:12:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:42,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:42,851 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:42,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870907109] [2021-11-20 23:12:42,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870907109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:42,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:42,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:12:42,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7240355] [2021-11-20 23:12:42,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:42,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:12:42,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:42,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:12:42,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:12:42,856 INFO L87 Difference]: Start difference. First operand 810 states and 1187 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:12:43,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:43,388 INFO L93 Difference]: Finished difference Result 3163 states and 4753 transitions. [2021-11-20 23:12:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:12:43,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2021-11-20 23:12:43,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:43,410 INFO L225 Difference]: With dead ends: 3163 [2021-11-20 23:12:43,410 INFO L226 Difference]: Without dead ends: 2358 [2021-11-20 23:12:43,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:12:43,416 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 509 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:43,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 589 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:12:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-11-20 23:12:43,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2128. [2021-11-20 23:12:43,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 1675 states have (on average 1.4382089552238806) internal successors, (2409), 1681 states have internal predecessors, (2409), 288 states have call successors, (288), 148 states have call predecessors, (288), 164 states have return successors, (494), 299 states have call predecessors, (494), 288 states have call successors, (494) [2021-11-20 23:12:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 3191 transitions. [2021-11-20 23:12:43,616 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 3191 transitions. Word has length 45 [2021-11-20 23:12:43,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:43,617 INFO L470 AbstractCegarLoop]: Abstraction has 2128 states and 3191 transitions. [2021-11-20 23:12:43,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:12:43,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 3191 transitions. [2021-11-20 23:12:43,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 23:12:43,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:43,621 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] [2021-11-20 23:12:43,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:12:43,621 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:43,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1299791994, now seen corresponding path program 1 times [2021-11-20 23:12:43,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:43,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286375306] [2021-11-20 23:12:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:43,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:43,786 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:43,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286375306] [2021-11-20 23:12:43,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286375306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:43,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:43,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:12:43,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142029351] [2021-11-20 23:12:43,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:43,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:12:43,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:43,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:12:43,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:12:43,789 INFO L87 Difference]: Start difference. First operand 2128 states and 3191 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:12:44,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:44,281 INFO L93 Difference]: Finished difference Result 5982 states and 8997 transitions. [2021-11-20 23:12:44,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:12:44,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2021-11-20 23:12:44,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:44,322 INFO L225 Difference]: With dead ends: 5982 [2021-11-20 23:12:44,322 INFO L226 Difference]: Without dead ends: 3860 [2021-11-20 23:12:44,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:12:44,344 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 431 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:44,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 315 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:12:44,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2021-11-20 23:12:44,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 3384. [2021-11-20 23:12:44,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3384 states, 2687 states have (on average 1.4194268701153703) internal successors, (3814), 2696 states have internal predecessors, (3814), 426 states have call successors, (426), 240 states have call predecessors, (426), 270 states have return successors, (725), 448 states have call predecessors, (725), 426 states have call successors, (725) [2021-11-20 23:12:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3384 states to 3384 states and 4965 transitions. [2021-11-20 23:12:44,652 INFO L78 Accepts]: Start accepts. Automaton has 3384 states and 4965 transitions. Word has length 45 [2021-11-20 23:12:44,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:44,654 INFO L470 AbstractCegarLoop]: Abstraction has 3384 states and 4965 transitions. [2021-11-20 23:12:44,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:12:44,655 INFO L276 IsEmpty]: Start isEmpty. Operand 3384 states and 4965 transitions. [2021-11-20 23:12:44,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 23:12:44,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:44,658 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] [2021-11-20 23:12:44,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:12:44,659 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:44,661 INFO L85 PathProgramCache]: Analyzing trace with hash 602838576, now seen corresponding path program 1 times [2021-11-20 23:12:44,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:44,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328051871] [2021-11-20 23:12:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:44,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:44,784 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:44,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328051871] [2021-11-20 23:12:44,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328051871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:44,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:44,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:12:44,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824025698] [2021-11-20 23:12:44,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:44,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:12:44,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:44,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:12:44,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:12:44,790 INFO L87 Difference]: Start difference. First operand 3384 states and 4965 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:12:45,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:45,524 INFO L93 Difference]: Finished difference Result 10166 states and 14972 transitions. [2021-11-20 23:12:45,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:12:45,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2021-11-20 23:12:45,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:45,581 INFO L225 Difference]: With dead ends: 10166 [2021-11-20 23:12:45,581 INFO L226 Difference]: Without dead ends: 6788 [2021-11-20 23:12:45,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:12:45,596 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 388 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:45,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 315 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:12:45,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6788 states. [2021-11-20 23:12:46,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6788 to 6046. [2021-11-20 23:12:46,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6046 states, 4815 states have (on average 1.412461059190031) internal successors, (6801), 4828 states have internal predecessors, (6801), 740 states have call successors, (740), 420 states have call predecessors, (740), 490 states have return successors, (1318), 798 states have call predecessors, (1318), 740 states have call successors, (1318) [2021-11-20 23:12:46,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6046 states to 6046 states and 8859 transitions. [2021-11-20 23:12:46,131 INFO L78 Accepts]: Start accepts. Automaton has 6046 states and 8859 transitions. Word has length 46 [2021-11-20 23:12:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:46,132 INFO L470 AbstractCegarLoop]: Abstraction has 6046 states and 8859 transitions. [2021-11-20 23:12:46,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:12:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 6046 states and 8859 transitions. [2021-11-20 23:12:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 23:12:46,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:46,136 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] [2021-11-20 23:12:46,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:12:46,137 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:46,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:46,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1616814173, now seen corresponding path program 1 times [2021-11-20 23:12:46,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:46,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740014725] [2021-11-20 23:12:46,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:46,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:46,219 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:46,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740014725] [2021-11-20 23:12:46,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740014725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:46,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:46,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:12:46,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383121972] [2021-11-20 23:12:46,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:46,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:12:46,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:46,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:12:46,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:12:46,222 INFO L87 Difference]: Start difference. First operand 6046 states and 8859 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:12:47,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:47,131 INFO L93 Difference]: Finished difference Result 16750 states and 24959 transitions. [2021-11-20 23:12:47,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:12:47,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2021-11-20 23:12:47,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:47,217 INFO L225 Difference]: With dead ends: 16750 [2021-11-20 23:12:47,217 INFO L226 Difference]: Without dead ends: 10710 [2021-11-20 23:12:47,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:12:47,240 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 357 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:47,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 328 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:12:47,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10710 states. [2021-11-20 23:12:48,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10710 to 9576. [2021-11-20 23:12:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9576 states, 7605 states have (on average 1.3982905982905982) internal successors, (10634), 7634 states have internal predecessors, (10634), 1188 states have call successors, (1188), 696 states have call predecessors, (1188), 782 states have return successors, (2091), 1246 states have call predecessors, (2091), 1188 states have call successors, (2091) [2021-11-20 23:12:48,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9576 states to 9576 states and 13913 transitions. [2021-11-20 23:12:48,129 INFO L78 Accepts]: Start accepts. Automaton has 9576 states and 13913 transitions. Word has length 47 [2021-11-20 23:12:48,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:48,129 INFO L470 AbstractCegarLoop]: Abstraction has 9576 states and 13913 transitions. [2021-11-20 23:12:48,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:12:48,130 INFO L276 IsEmpty]: Start isEmpty. Operand 9576 states and 13913 transitions. [2021-11-20 23:12:48,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 23:12:48,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:48,131 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] [2021-11-20 23:12:48,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:12:48,132 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:48,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:48,132 INFO L85 PathProgramCache]: Analyzing trace with hash -326246836, now seen corresponding path program 1 times [2021-11-20 23:12:48,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:48,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228638174] [2021-11-20 23:12:48,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:48,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:48,194 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:48,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228638174] [2021-11-20 23:12:48,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228638174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:48,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:48,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:12:48,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063993628] [2021-11-20 23:12:48,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:48,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:12:48,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:48,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:12:48,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:12:48,196 INFO L87 Difference]: Start difference. First operand 9576 states and 13913 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:12:49,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:49,463 INFO L93 Difference]: Finished difference Result 26222 states and 38781 transitions. [2021-11-20 23:12:49,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:12:49,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2021-11-20 23:12:49,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:49,556 INFO L225 Difference]: With dead ends: 26222 [2021-11-20 23:12:49,556 INFO L226 Difference]: Without dead ends: 16652 [2021-11-20 23:12:49,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:12:49,597 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 358 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:49,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 342 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:12:49,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16652 states. [2021-11-20 23:12:50,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16652 to 15498. [2021-11-20 23:12:50,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15498 states, 12290 states have (on average 1.3807160292921075) internal successors, (16969), 12345 states have internal predecessors, (16969), 1933 states have call successors, (1933), 1166 states have call predecessors, (1933), 1274 states have return successors, (3359), 1987 states have call predecessors, (3359), 1933 states have call successors, (3359) [2021-11-20 23:12:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15498 states to 15498 states and 22261 transitions. [2021-11-20 23:12:51,047 INFO L78 Accepts]: Start accepts. Automaton has 15498 states and 22261 transitions. Word has length 48 [2021-11-20 23:12:51,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:51,047 INFO L470 AbstractCegarLoop]: Abstraction has 15498 states and 22261 transitions. [2021-11-20 23:12:51,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:12:51,048 INFO L276 IsEmpty]: Start isEmpty. Operand 15498 states and 22261 transitions. [2021-11-20 23:12:51,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 23:12:51,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:51,050 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] [2021-11-20 23:12:51,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:12:51,050 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:51,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1092608959, now seen corresponding path program 1 times [2021-11-20 23:12:51,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:51,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785067797] [2021-11-20 23:12:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:51,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:51,117 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:51,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785067797] [2021-11-20 23:12:51,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785067797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:51,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:51,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:12:51,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333138840] [2021-11-20 23:12:51,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:51,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:12:51,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:51,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:12:51,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:12:51,120 INFO L87 Difference]: Start difference. First operand 15498 states and 22261 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 23:12:52,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:52,929 INFO L93 Difference]: Finished difference Result 45968 states and 67924 transitions. [2021-11-20 23:12:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:12:52,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2021-11-20 23:12:52,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:53,085 INFO L225 Difference]: With dead ends: 45968 [2021-11-20 23:12:53,086 INFO L226 Difference]: Without dead ends: 30475 [2021-11-20 23:12:53,153 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 [2021-11-20 23:12:53,154 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 109 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:53,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 226 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:12:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30475 states. [2021-11-20 23:12:55,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30475 to 30238. [2021-11-20 23:12:55,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30238 states, 23827 states have (on average 1.3496873295001468) internal successors, (32159), 23936 states have internal predecessors, (32159), 3862 states have call successors, (3862), 2332 states have call predecessors, (3862), 2548 states have return successors, (6714), 3970 states have call predecessors, (6714), 3862 states have call successors, (6714) [2021-11-20 23:12:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30238 states to 30238 states and 42735 transitions. [2021-11-20 23:12:55,549 INFO L78 Accepts]: Start accepts. Automaton has 30238 states and 42735 transitions. Word has length 49 [2021-11-20 23:12:55,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:55,550 INFO L470 AbstractCegarLoop]: Abstraction has 30238 states and 42735 transitions. [2021-11-20 23:12:55,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 23:12:55,550 INFO L276 IsEmpty]: Start isEmpty. Operand 30238 states and 42735 transitions. [2021-11-20 23:12:55,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 23:12:55,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:55,558 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:55,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:12:55,559 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:55,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:55,559 INFO L85 PathProgramCache]: Analyzing trace with hash 98197573, now seen corresponding path program 1 times [2021-11-20 23:12:55,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:55,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070965926] [2021-11-20 23:12:55,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:55,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:12:55,629 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:55,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070965926] [2021-11-20 23:12:55,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070965926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:55,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:55,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:12:55,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079126021] [2021-11-20 23:12:55,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:55,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:12:55,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:55,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:12:55,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:12:55,632 INFO L87 Difference]: Start difference. First operand 30238 states and 42735 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 23:12:57,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:57,372 INFO L93 Difference]: Finished difference Result 56778 states and 81509 transitions. [2021-11-20 23:12:57,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:12:57,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 67 [2021-11-20 23:12:57,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:57,615 INFO L225 Difference]: With dead ends: 56778 [2021-11-20 23:12:57,615 INFO L226 Difference]: Without dead ends: 41286 [2021-11-20 23:12:57,684 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 [2021-11-20 23:12:57,687 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 78 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:57,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 309 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:12:57,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41286 states. [2021-11-20 23:12:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41286 to 34462. [2021-11-20 23:12:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34462 states, 27577 states have (on average 1.3667911665518366) internal successors, (37692), 27686 states have internal predecessors, (37692), 4099 states have call successors, (4099), 2569 states have call predecessors, (4099), 2785 states have return successors, (6951), 4207 states have call predecessors, (6951), 4099 states have call successors, (6951) [2021-11-20 23:13:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34462 states to 34462 states and 48742 transitions. [2021-11-20 23:13:00,136 INFO L78 Accepts]: Start accepts. Automaton has 34462 states and 48742 transitions. Word has length 67 [2021-11-20 23:13:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:00,137 INFO L470 AbstractCegarLoop]: Abstraction has 34462 states and 48742 transitions. [2021-11-20 23:13:00,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 23:13:00,137 INFO L276 IsEmpty]: Start isEmpty. Operand 34462 states and 48742 transitions. [2021-11-20 23:13:00,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-20 23:13:00,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:00,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:00,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:13:00,186 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:00,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:00,187 INFO L85 PathProgramCache]: Analyzing trace with hash -65364597, now seen corresponding path program 1 times [2021-11-20 23:13:00,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:00,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782585908] [2021-11-20 23:13:00,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:00,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:13:00,283 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:00,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782585908] [2021-11-20 23:13:00,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782585908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:13:00,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519526250] [2021-11-20 23:13:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:00,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:13:00,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:13:00,286 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:13:00,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:13:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:00,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:13:00,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:13:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 23:13:00,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:13:00,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519526250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:00,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:13:00,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-20 23:13:00,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632146914] [2021-11-20 23:13:00,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:00,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:00,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:00,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:00,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:00,713 INFO L87 Difference]: Start difference. First operand 34462 states and 48742 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 23:13:02,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:02,781 INFO L93 Difference]: Finished difference Result 64573 states and 91591 transitions. [2021-11-20 23:13:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:02,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 95 [2021-11-20 23:13:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:02,938 INFO L225 Difference]: With dead ends: 64573 [2021-11-20 23:13:02,938 INFO L226 Difference]: Without dead ends: 41145 [2021-11-20 23:13:03,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:03,011 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 72 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:03,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 225 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:13:03,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41145 states. [2021-11-20 23:13:05,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41145 to 37010. [2021-11-20 23:13:05,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37010 states, 29361 states have (on average 1.34266544055039) internal successors, (39422), 29502 states have internal predecessors, (39422), 4615 states have call successors, (4615), 2905 states have call predecessors, (4615), 3033 states have return successors, (6993), 4603 states have call predecessors, (6993), 4615 states have call successors, (6993) [2021-11-20 23:13:05,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37010 states to 37010 states and 51030 transitions. [2021-11-20 23:13:05,461 INFO L78 Accepts]: Start accepts. Automaton has 37010 states and 51030 transitions. Word has length 95 [2021-11-20 23:13:05,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:05,462 INFO L470 AbstractCegarLoop]: Abstraction has 37010 states and 51030 transitions. [2021-11-20 23:13:05,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 23:13:05,462 INFO L276 IsEmpty]: Start isEmpty. Operand 37010 states and 51030 transitions. [2021-11-20 23:13:05,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-20 23:13:05,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:05,514 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:05,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:13:05,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:13:05,730 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:05,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:05,730 INFO L85 PathProgramCache]: Analyzing trace with hash 925800076, now seen corresponding path program 1 times [2021-11-20 23:13:05,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:05,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507265471] [2021-11-20 23:13:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:05,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 23:13:05,874 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:05,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507265471] [2021-11-20 23:13:05,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507265471] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:13:05,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737936804] [2021-11-20 23:13:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:05,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:13:05,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:13:05,890 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:13:05,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:13:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:06,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:13:06,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:13:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:06,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:13:06,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737936804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:06,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:13:06,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-20 23:13:06,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181858644] [2021-11-20 23:13:06,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:06,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:06,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:06,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:06,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:06,286 INFO L87 Difference]: Start difference. First operand 37010 states and 51030 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 23:13:08,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:08,521 INFO L93 Difference]: Finished difference Result 75874 states and 105042 transitions. [2021-11-20 23:13:08,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:08,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 95 [2021-11-20 23:13:08,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:08,678 INFO L225 Difference]: With dead ends: 75874 [2021-11-20 23:13:08,678 INFO L226 Difference]: Without dead ends: 44514 [2021-11-20 23:13:08,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:08,754 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 69 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:08,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 304 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:13:08,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44514 states. [2021-11-20 23:13:10,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44514 to 40142. [2021-11-20 23:13:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40142 states, 32151 states have (on average 1.3516531367609095) internal successors, (43457), 32292 states have internal predecessors, (43457), 4786 states have call successors, (4786), 3076 states have call predecessors, (4786), 3204 states have return successors, (7164), 4774 states have call predecessors, (7164), 4786 states have call successors, (7164) [2021-11-20 23:13:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40142 states to 40142 states and 55407 transitions. [2021-11-20 23:13:11,083 INFO L78 Accepts]: Start accepts. Automaton has 40142 states and 55407 transitions. Word has length 95 [2021-11-20 23:13:11,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:11,084 INFO L470 AbstractCegarLoop]: Abstraction has 40142 states and 55407 transitions. [2021-11-20 23:13:11,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 23:13:11,084 INFO L276 IsEmpty]: Start isEmpty. Operand 40142 states and 55407 transitions. [2021-11-20 23:13:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 23:13:11,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:11,131 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:11,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:13:11,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8b43214-b0ee-4165-97b1-73432e0bc908/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 23:13:11,346 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:11,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:11,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1133294107, now seen corresponding path program 1 times [2021-11-20 23:13:11,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:11,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936428145] [2021-11-20 23:13:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:11,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 23:13:11,405 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:11,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936428145] [2021-11-20 23:13:11,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936428145] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:11,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:11,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:11,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365639479] [2021-11-20 23:13:11,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:11,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:11,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:11,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:11,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:13:11,408 INFO L87 Difference]: Start difference. First operand 40142 states and 55407 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 23:13:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:13,530 INFO L93 Difference]: Finished difference Result 83613 states and 115746 transitions. [2021-11-20 23:13:13,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:13,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 93 [2021-11-20 23:13:13,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:13,698 INFO L225 Difference]: With dead ends: 83613 [2021-11-20 23:13:13,699 INFO L226 Difference]: Without dead ends: 48144 [2021-11-20 23:13:13,817 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 [2021-11-20 23:13:13,818 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 100 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:13,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 231 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:13:13,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48144 states. [2021-11-20 23:13:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48144 to 30534. [2021-11-20 23:13:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30534 states, 24355 states have (on average 1.3402997331143502) internal successors, (32643), 24466 states have internal predecessors, (32643), 3738 states have call successors, (3738), 2400 states have call predecessors, (3738), 2440 states have return successors, (5162), 3668 states have call predecessors, (5162), 3738 states have call successors, (5162) [2021-11-20 23:13:16,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30534 states to 30534 states and 41543 transitions. [2021-11-20 23:13:16,044 INFO L78 Accepts]: Start accepts. Automaton has 30534 states and 41543 transitions. Word has length 93 [2021-11-20 23:13:16,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:16,045 INFO L470 AbstractCegarLoop]: Abstraction has 30534 states and 41543 transitions. [2021-11-20 23:13:16,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 23:13:16,045 INFO L276 IsEmpty]: Start isEmpty. Operand 30534 states and 41543 transitions. [2021-11-20 23:13:16,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 23:13:16,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:16,071 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 23:13:16,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 23:13:16,071 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:16,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:16,072 INFO L85 PathProgramCache]: Analyzing trace with hash 2049687812, now seen corresponding path program 1 times [2021-11-20 23:13:16,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:16,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926758772] [2021-11-20 23:13:16,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:16,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 23:13:16,126 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:16,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926758772] [2021-11-20 23:13:16,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926758772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:16,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:16,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:13:16,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340026576] [2021-11-20 23:13:16,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:16,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:16,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:16,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:16,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:16,128 INFO L87 Difference]: Start difference. First operand 30534 states and 41543 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 23:13:17,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:17,939 INFO L93 Difference]: Finished difference Result 47973 states and 67075 transitions. [2021-11-20 23:13:17,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:17,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 93 [2021-11-20 23:13:17,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:18,020 INFO L225 Difference]: With dead ends: 47973 [2021-11-20 23:13:18,021 INFO L226 Difference]: Without dead ends: 30534 [2021-11-20 23:13:18,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:18,054 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 240 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:18,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 354 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:13:18,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30534 states. [2021-11-20 23:13:19,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30534 to 30116. [2021-11-20 23:13:19,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30116 states, 23937 states have (on average 1.3195053682583449) internal successors, (31585), 24048 states have internal predecessors, (31585), 3738 states have call successors, (3738), 2400 states have call predecessors, (3738), 2440 states have return successors, (5162), 3668 states have call predecessors, (5162), 3738 states have call successors, (5162) [2021-11-20 23:13:19,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30116 states to 30116 states and 40485 transitions. [2021-11-20 23:13:19,842 INFO L78 Accepts]: Start accepts. Automaton has 30116 states and 40485 transitions. Word has length 93 [2021-11-20 23:13:19,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:19,842 INFO L470 AbstractCegarLoop]: Abstraction has 30116 states and 40485 transitions. [2021-11-20 23:13:19,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 23:13:19,843 INFO L276 IsEmpty]: Start isEmpty. Operand 30116 states and 40485 transitions. [2021-11-20 23:13:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 23:13:19,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:19,862 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 23:13:19,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 23:13:19,862 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:19,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:19,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1388354021, now seen corresponding path program 1 times [2021-11-20 23:13:19,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:19,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131970219] [2021-11-20 23:13:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:19,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 23:13:20,055 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:20,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131970219] [2021-11-20 23:13:20,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131970219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:20,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:20,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 23:13:20,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193633509] [2021-11-20 23:13:20,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:20,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 23:13:20,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:20,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 23:13:20,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:13:20,060 INFO L87 Difference]: Start difference. First operand 30116 states and 40485 transitions. Second operand has 11 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-20 23:13:24,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:24,973 INFO L93 Difference]: Finished difference Result 102197 states and 142679 transitions. [2021-11-20 23:13:24,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 23:13:24,974 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 93 [2021-11-20 23:13:24,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:25,203 INFO L225 Difference]: With dead ends: 102197 [2021-11-20 23:13:25,203 INFO L226 Difference]: Without dead ends: 76813 [2021-11-20 23:13:25,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-11-20 23:13:25,279 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 835 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:25,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 465 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 23:13:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76813 states.