./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.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_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/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_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/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_b50b2a00-f00e-4a15-aadf-96f15f5959a6/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 8c6f82e874e2f980b653c53fa0437dd3390b1771d726d8f345336fe56afb2bb6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:39:26,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:39:26,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:39:26,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:39:26,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:39:26,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:39:26,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:39:26,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:39:26,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:39:26,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:39:26,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:39:26,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:39:26,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:39:26,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:39:26,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:39:26,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:39:26,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:39:26,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:39:26,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:39:26,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:39:26,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:39:26,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:39:26,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:39:26,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:39:26,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:39:26,128 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:39:26,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:39:26,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:39:26,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:39:26,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:39:26,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:39:26,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:39:26,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:39:26,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:39:26,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:39:26,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:39:26,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:39:26,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:39:26,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:39:26,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:39:26,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:39:26,145 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:39:26,190 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:39:26,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:39:26,193 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:39:26,194 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:39:26,195 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:39:26,195 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:39:26,195 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:39:26,195 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:39:26,196 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:39:26,196 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:39:26,197 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:39:26,197 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:39:26,197 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:39:26,198 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:39:26,198 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:39:26,198 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:39:26,198 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:39:26,199 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:39:26,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:39:26,200 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:39:26,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:39:26,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:39:26,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:39:26,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:39:26,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:39:26,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:39:26,203 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:39:26,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:39:26,203 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:39:26,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:39:26,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:39:26,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:39:26,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:39:26,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:39:26,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:39:26,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:39:26,205 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:39:26,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:39:26,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:39:26,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:39:26,206 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:39:26,206 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_b50b2a00-f00e-4a15-aadf-96f15f5959a6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c6f82e874e2f980b653c53fa0437dd3390b1771d726d8f345336fe56afb2bb6 [2021-11-20 23:39:26,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:39:26,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:39:26,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:39:26,574 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:39:26,574 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:39:26,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c [2021-11-20 23:39:26,659 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/data/78ac84400/61a730e51eef4fc4a55eb66cfadb4cdf/FLAG88483a036 [2021-11-20 23:39:27,261 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:39:27,263 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c [2021-11-20 23:39:27,300 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/data/78ac84400/61a730e51eef4fc4a55eb66cfadb4cdf/FLAG88483a036 [2021-11-20 23:39:27,500 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/data/78ac84400/61a730e51eef4fc4a55eb66cfadb4cdf [2021-11-20 23:39:27,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:39:27,504 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:39:27,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:39:27,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:39:27,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:39:27,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:39:27" (1/1) ... [2021-11-20 23:39:27,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3db1ff3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:27, skipping insertion in model container [2021-11-20 23:39:27,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:39:27" (1/1) ... [2021-11-20 23:39:27,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:39:27,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:39:28,088 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_b50b2a00-f00e-4a15-aadf-96f15f5959a6/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c[74369,74382] [2021-11-20 23:39:28,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:39:28,136 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:39:28,272 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_b50b2a00-f00e-4a15-aadf-96f15f5959a6/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c[74369,74382] [2021-11-20 23:39:28,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:39:28,294 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:39:28,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:28 WrapperNode [2021-11-20 23:39:28,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:39:28,299 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:39:28,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:39:28,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:39:28,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:28" (1/1) ... [2021-11-20 23:39:28,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:28" (1/1) ... [2021-11-20 23:39:28,404 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 792 [2021-11-20 23:39:28,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:39:28,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:39:28,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:39:28,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:39:28,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:28" (1/1) ... [2021-11-20 23:39:28,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:28" (1/1) ... [2021-11-20 23:39:28,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:28" (1/1) ... [2021-11-20 23:39:28,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:28" (1/1) ... [2021-11-20 23:39:28,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:28" (1/1) ... [2021-11-20 23:39:28,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:28" (1/1) ... [2021-11-20 23:39:28,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:28" (1/1) ... [2021-11-20 23:39:28,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:39:28,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:39:28,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:39:28,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:39:28,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:28" (1/1) ... [2021-11-20 23:39:28,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:39:28,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:39:28,549 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:39:28,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:39:28,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:39:28,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:39:28,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:39:28,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:39:28,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:39:28,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:39:28,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:39:28,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:39:28,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:39:28,800 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:39:28,801 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:39:28,826 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 23:39:30,472 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-20 23:39:30,472 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-20 23:39:30,472 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:39:30,866 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:39:30,867 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:39:30,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:39:30 BoogieIcfgContainer [2021-11-20 23:39:30,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:39:30,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:39:30,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:39:30,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:39:30,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:39:27" (1/3) ... [2021-11-20 23:39:30,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ef1866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:39:30, skipping insertion in model container [2021-11-20 23:39:30,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:28" (2/3) ... [2021-11-20 23:39:30,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ef1866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:39:30, skipping insertion in model container [2021-11-20 23:39:30,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:39:30" (3/3) ... [2021-11-20 23:39:30,881 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.07.i.cil-2.c [2021-11-20 23:39:30,887 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:39:30,887 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:39:30,936 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:39:30,943 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 23:39:30,943 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:39:30,963 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 107 states have (on average 1.7570093457943925) internal successors, (188), 108 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:30,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 23:39:30,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:30,972 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] [2021-11-20 23:39:30,972 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:39:30,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:30,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1727946225, now seen corresponding path program 1 times [2021-11-20 23:39:30,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:31,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764133082] [2021-11-20 23:39:31,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:31,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:31,479 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 23:39:31,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:31,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764133082] [2021-11-20 23:39:31,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764133082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:31,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:31,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:39:31,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993743725] [2021-11-20 23:39:31,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:31,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:39:31,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:31,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:39:31,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:39:31,532 INFO L87 Difference]: Start difference. First operand has 109 states, 107 states have (on average 1.7570093457943925) internal successors, (188), 108 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:33,569 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:34,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:34,114 INFO L93 Difference]: Finished difference Result 241 states and 416 transitions. [2021-11-20 23:39:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:39:34,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-20 23:39:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:34,127 INFO L225 Difference]: With dead ends: 241 [2021-11-20 23:39:34,127 INFO L226 Difference]: Without dead ends: 128 [2021-11-20 23:39:34,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:39:34,136 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 20 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:34,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 393 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 160 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 23:39:34,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-20 23:39:34,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2021-11-20 23:39:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5391304347826087) internal successors, (177), 115 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 177 transitions. [2021-11-20 23:39:34,214 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 177 transitions. Word has length 29 [2021-11-20 23:39:34,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:34,215 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 177 transitions. [2021-11-20 23:39:34,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:34,216 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 177 transitions. [2021-11-20 23:39:34,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 23:39:34,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:34,221 INFO L514 BasicCegarLoop]: trace histogram [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 23:39:34,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:39:34,222 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:39:34,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:34,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1758311644, now seen corresponding path program 1 times [2021-11-20 23:39:34,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:34,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307478244] [2021-11-20 23:39:34,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:34,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:39:34,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:34,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307478244] [2021-11-20 23:39:34,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307478244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:34,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:34,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:39:34,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418913014] [2021-11-20 23:39:34,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:34,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:39:34,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:34,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:39:34,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:39:34,380 INFO L87 Difference]: Start difference. First operand 116 states and 177 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:36,392 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:36,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:36,827 INFO L93 Difference]: Finished difference Result 232 states and 348 transitions. [2021-11-20 23:39:36,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:39:36,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-20 23:39:36,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:36,836 INFO L225 Difference]: With dead ends: 232 [2021-11-20 23:39:36,836 INFO L226 Difference]: Without dead ends: 128 [2021-11-20 23:39:36,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:39:36,839 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 19 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:36,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 325 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 23:39:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-20 23:39:36,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2021-11-20 23:39:36,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5304347826086957) internal successors, (176), 115 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 176 transitions. [2021-11-20 23:39:36,851 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 176 transitions. Word has length 39 [2021-11-20 23:39:36,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:36,851 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 176 transitions. [2021-11-20 23:39:36,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:36,852 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 176 transitions. [2021-11-20 23:39:36,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 23:39:36,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:36,853 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:39:36,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:39:36,854 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:39:36,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:36,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1594262621, now seen corresponding path program 1 times [2021-11-20 23:39:36,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:36,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205391925] [2021-11-20 23:39:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:36,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:39:36,969 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:36,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205391925] [2021-11-20 23:39:36,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205391925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:36,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:36,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:39:36,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177921397] [2021-11-20 23:39:36,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:36,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:39:36,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:36,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:39:36,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:39:36,972 INFO L87 Difference]: Start difference. First operand 116 states and 176 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:38,988 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:39,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:39,345 INFO L93 Difference]: Finished difference Result 232 states and 347 transitions. [2021-11-20 23:39:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:39:39,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-20 23:39:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:39,347 INFO L225 Difference]: With dead ends: 232 [2021-11-20 23:39:39,348 INFO L226 Difference]: Without dead ends: 128 [2021-11-20 23:39:39,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:39:39,350 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 17 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:39,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 324 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:39:39,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-20 23:39:39,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2021-11-20 23:39:39,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5217391304347827) internal successors, (175), 115 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:39,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 175 transitions. [2021-11-20 23:39:39,361 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 175 transitions. Word has length 40 [2021-11-20 23:39:39,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:39,361 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 175 transitions. [2021-11-20 23:39:39,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:39,362 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 175 transitions. [2021-11-20 23:39:39,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 23:39:39,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:39,363 INFO L514 BasicCegarLoop]: trace histogram [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 23:39:39,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:39:39,364 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:39:39,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:39,365 INFO L85 PathProgramCache]: Analyzing trace with hash 937174827, now seen corresponding path program 1 times [2021-11-20 23:39:39,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:39,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606147387] [2021-11-20 23:39:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:39,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:39:39,445 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:39,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606147387] [2021-11-20 23:39:39,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606147387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:39,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:39,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:39:39,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634935274] [2021-11-20 23:39:39,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:39,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:39:39,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:39,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:39:39,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:39:39,448 INFO L87 Difference]: Start difference. First operand 116 states and 175 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:41,460 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:41,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:41,835 INFO L93 Difference]: Finished difference Result 232 states and 346 transitions. [2021-11-20 23:39:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:39:41,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-20 23:39:41,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:41,837 INFO L225 Difference]: With dead ends: 232 [2021-11-20 23:39:41,837 INFO L226 Difference]: Without dead ends: 128 [2021-11-20 23:39:41,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:39:41,842 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 15 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:41,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 324 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 23:39:41,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-20 23:39:41,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2021-11-20 23:39:41,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5130434782608695) internal successors, (174), 115 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:41,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 174 transitions. [2021-11-20 23:39:41,852 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 174 transitions. Word has length 41 [2021-11-20 23:39:41,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:41,853 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 174 transitions. [2021-11-20 23:39:41,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:41,853 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 174 transitions. [2021-11-20 23:39:41,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 23:39:41,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:41,855 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:39:41,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:39:41,856 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:39:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:41,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1600964730, now seen corresponding path program 1 times [2021-11-20 23:39:41,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:41,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690310265] [2021-11-20 23:39:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:41,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:39:41,932 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:41,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690310265] [2021-11-20 23:39:41,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690310265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:41,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:41,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:39:41,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530514531] [2021-11-20 23:39:41,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:41,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:39:41,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:41,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:39:41,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:39:41,935 INFO L87 Difference]: Start difference. First operand 116 states and 174 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:43,946 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:44,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:44,292 INFO L93 Difference]: Finished difference Result 232 states and 345 transitions. [2021-11-20 23:39:44,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:39:44,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-20 23:39:44,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:44,295 INFO L225 Difference]: With dead ends: 232 [2021-11-20 23:39:44,295 INFO L226 Difference]: Without dead ends: 128 [2021-11-20 23:39:44,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:39:44,297 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 11 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:44,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 324 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:39:44,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-20 23:39:44,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2021-11-20 23:39:44,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5043478260869565) internal successors, (173), 115 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:44,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 173 transitions. [2021-11-20 23:39:44,306 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 173 transitions. Word has length 41 [2021-11-20 23:39:44,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:44,307 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 173 transitions. [2021-11-20 23:39:44,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:44,307 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 173 transitions. [2021-11-20 23:39:44,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 23:39:44,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:44,309 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:39:44,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:39:44,309 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:39:44,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:44,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1346880773, now seen corresponding path program 1 times [2021-11-20 23:39:44,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:44,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647134828] [2021-11-20 23:39:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:44,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:39:44,385 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:44,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647134828] [2021-11-20 23:39:44,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647134828] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:44,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:44,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:39:44,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461703260] [2021-11-20 23:39:44,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:44,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:39:44,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:44,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:39:44,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:39:44,388 INFO L87 Difference]: Start difference. First operand 116 states and 173 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:46,401 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:46,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:46,770 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2021-11-20 23:39:46,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:39:46,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-20 23:39:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:46,772 INFO L225 Difference]: With dead ends: 232 [2021-11-20 23:39:46,772 INFO L226 Difference]: Without dead ends: 128 [2021-11-20 23:39:46,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:39:46,774 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 9 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:46,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 325 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 23:39:46,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-20 23:39:46,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2021-11-20 23:39:46,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.4956521739130435) internal successors, (172), 115 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:46,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 172 transitions. [2021-11-20 23:39:46,782 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 172 transitions. Word has length 41 [2021-11-20 23:39:46,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:46,783 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 172 transitions. [2021-11-20 23:39:46,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:46,783 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 172 transitions. [2021-11-20 23:39:46,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 23:39:46,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:46,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:39:46,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:39:46,785 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:39:46,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:46,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1885808468, now seen corresponding path program 1 times [2021-11-20 23:39:46,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:46,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315601546] [2021-11-20 23:39:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:46,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:39:46,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:46,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315601546] [2021-11-20 23:39:46,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315601546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:46,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:46,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:39:46,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216634681] [2021-11-20 23:39:46,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:46,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:39:46,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:46,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:39:46,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:39:46,860 INFO L87 Difference]: Start difference. First operand 116 states and 172 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:48,877 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:49,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:49,178 INFO L93 Difference]: Finished difference Result 230 states and 341 transitions. [2021-11-20 23:39:49,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:39:49,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-20 23:39:49,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:49,180 INFO L225 Difference]: With dead ends: 230 [2021-11-20 23:39:49,180 INFO L226 Difference]: Without dead ends: 126 [2021-11-20 23:39:49,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:39:49,181 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 9 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:49,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 328 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 145 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:39:49,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-20 23:39:49,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2021-11-20 23:39:49,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.4869565217391305) internal successors, (171), 115 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:49,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 171 transitions. [2021-11-20 23:39:49,202 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 171 transitions. Word has length 42 [2021-11-20 23:39:49,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:49,202 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 171 transitions. [2021-11-20 23:39:49,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:49,203 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 171 transitions. [2021-11-20 23:39:49,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 23:39:49,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:49,204 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:39:49,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:39:49,204 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:39:49,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:49,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1091110920, now seen corresponding path program 1 times [2021-11-20 23:39:49,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:49,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762493375] [2021-11-20 23:39:49,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:49,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:39:49,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:49,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762493375] [2021-11-20 23:39:49,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762493375] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:49,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:49,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:39:49,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150878197] [2021-11-20 23:39:49,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:49,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:39:49,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:49,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:39:49,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:39:49,322 INFO L87 Difference]: Start difference. First operand 116 states and 171 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:51,333 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:51,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:51,648 INFO L93 Difference]: Finished difference Result 230 states and 340 transitions. [2021-11-20 23:39:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:39:51,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-20 23:39:51,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:51,651 INFO L225 Difference]: With dead ends: 230 [2021-11-20 23:39:51,651 INFO L226 Difference]: Without dead ends: 126 [2021-11-20 23:39:51,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:39:51,653 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 11 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:51,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 328 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 145 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:39:51,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-20 23:39:51,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2021-11-20 23:39:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.4782608695652173) internal successors, (170), 115 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 170 transitions. [2021-11-20 23:39:51,660 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 170 transitions. Word has length 42 [2021-11-20 23:39:51,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:51,660 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 170 transitions. [2021-11-20 23:39:51,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:51,681 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 170 transitions. [2021-11-20 23:39:51,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 23:39:51,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:51,682 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:39:51,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:39:51,683 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:39:51,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:51,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1618107046, now seen corresponding path program 1 times [2021-11-20 23:39:51,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:51,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192026605] [2021-11-20 23:39:51,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:51,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:39:51,745 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:51,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192026605] [2021-11-20 23:39:51,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192026605] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:51,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:51,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:39:51,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16337482] [2021-11-20 23:39:51,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:51,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:39:51,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:51,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:39:51,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:39:51,748 INFO L87 Difference]: Start difference. First operand 116 states and 170 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:53,760 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:54,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:54,116 INFO L93 Difference]: Finished difference Result 222 states and 329 transitions. [2021-11-20 23:39:54,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:39:54,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-20 23:39:54,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:54,118 INFO L225 Difference]: With dead ends: 222 [2021-11-20 23:39:54,119 INFO L226 Difference]: Without dead ends: 118 [2021-11-20 23:39:54,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:39:54,120 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 5 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:54,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 338 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:39:54,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-20 23:39:54,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2021-11-20 23:39:54,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.4695652173913043) internal successors, (169), 115 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 169 transitions. [2021-11-20 23:39:54,126 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 169 transitions. Word has length 43 [2021-11-20 23:39:54,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:54,126 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 169 transitions. [2021-11-20 23:39:54,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 169 transitions. [2021-11-20 23:39:54,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 23:39:54,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:54,128 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:39:54,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:39:54,128 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:39:54,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:54,129 INFO L85 PathProgramCache]: Analyzing trace with hash -939077214, now seen corresponding path program 1 times [2021-11-20 23:39:54,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:54,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612306719] [2021-11-20 23:39:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:54,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:39:54,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:54,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612306719] [2021-11-20 23:39:54,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612306719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:54,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:54,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:39:54,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734934219] [2021-11-20 23:39:54,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:54,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:39:54,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:54,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:39:54,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:39:54,198 INFO L87 Difference]: Start difference. First operand 116 states and 169 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:56,210 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:56,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:56,538 INFO L93 Difference]: Finished difference Result 254 states and 377 transitions. [2021-11-20 23:39:56,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:39:56,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-20 23:39:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:56,540 INFO L225 Difference]: With dead ends: 254 [2021-11-20 23:39:56,541 INFO L226 Difference]: Without dead ends: 150 [2021-11-20 23:39:56,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:39:56,542 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 21 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:56,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 333 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:39:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-20 23:39:56,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 136. [2021-11-20 23:39:56,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.5037037037037038) internal successors, (203), 135 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:56,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 203 transitions. [2021-11-20 23:39:56,549 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 203 transitions. Word has length 44 [2021-11-20 23:39:56,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:56,549 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 203 transitions. [2021-11-20 23:39:56,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:56,550 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 203 transitions. [2021-11-20 23:39:56,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 23:39:56,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:56,551 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:39:56,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:39:56,551 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:39:56,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:56,552 INFO L85 PathProgramCache]: Analyzing trace with hash -776550225, now seen corresponding path program 1 times [2021-11-20 23:39:56,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:56,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420632380] [2021-11-20 23:39:56,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:56,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:39:56,626 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:56,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420632380] [2021-11-20 23:39:56,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420632380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:56,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:56,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:39:56,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082372473] [2021-11-20 23:39:56,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:56,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:39:56,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:56,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:39:56,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:39:56,629 INFO L87 Difference]: Start difference. First operand 136 states and 203 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:58,641 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:58,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:58,974 INFO L93 Difference]: Finished difference Result 274 states and 410 transitions. [2021-11-20 23:39:58,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:39:58,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-20 23:39:58,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:58,976 INFO L225 Difference]: With dead ends: 274 [2021-11-20 23:39:58,976 INFO L226 Difference]: Without dead ends: 150 [2021-11-20 23:39:58,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:39:58,977 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 32 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:58,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 335 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 161 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:39:58,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-20 23:39:58,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 136. [2021-11-20 23:39:58,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.4962962962962962) internal successors, (202), 135 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:58,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 202 transitions. [2021-11-20 23:39:58,984 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 202 transitions. Word has length 54 [2021-11-20 23:39:58,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:58,984 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 202 transitions. [2021-11-20 23:39:58,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:39:58,984 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 202 transitions. [2021-11-20 23:39:58,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 23:39:58,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:58,985 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-20 23:39:58,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 23:39:58,986 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:39:58,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:58,986 INFO L85 PathProgramCache]: Analyzing trace with hash 322956010, now seen corresponding path program 1 times [2021-11-20 23:39:58,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:58,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5326147] [2021-11-20 23:39:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:58,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:39:59,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:59,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5326147] [2021-11-20 23:39:59,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5326147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:59,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:59,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:39:59,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272686403] [2021-11-20 23:39:59,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:59,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:39:59,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:59,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:39:59,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:39:59,105 INFO L87 Difference]: Start difference. First operand 136 states and 202 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:01,120 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:01,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:01,602 INFO L93 Difference]: Finished difference Result 277 states and 415 transitions. [2021-11-20 23:40:01,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:40:01,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-20 23:40:01,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:01,604 INFO L225 Difference]: With dead ends: 277 [2021-11-20 23:40:01,604 INFO L226 Difference]: Without dead ends: 153 [2021-11-20 23:40:01,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 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 23:40:01,606 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 118 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:01,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 234 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 268 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 23:40:01,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-20 23:40:01,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-11-20 23:40:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4701986754966887) internal successors, (222), 151 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:01,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 222 transitions. [2021-11-20 23:40:01,614 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 222 transitions. Word has length 55 [2021-11-20 23:40:01,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:01,615 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 222 transitions. [2021-11-20 23:40:01,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:01,615 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 222 transitions. [2021-11-20 23:40:01,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 23:40:01,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:01,616 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-20 23:40:01,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 23:40:01,617 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:01,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:01,618 INFO L85 PathProgramCache]: Analyzing trace with hash -636033417, now seen corresponding path program 1 times [2021-11-20 23:40:01,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:01,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157385366] [2021-11-20 23:40:01,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:01,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:01,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:01,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157385366] [2021-11-20 23:40:01,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157385366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:01,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:01,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:40:01,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016106761] [2021-11-20 23:40:01,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:01,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:40:01,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:01,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:40:01,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:40:01,683 INFO L87 Difference]: Start difference. First operand 152 states and 222 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:03,694 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:04,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:04,024 INFO L93 Difference]: Finished difference Result 306 states and 447 transitions. [2021-11-20 23:40:04,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:40:04,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-20 23:40:04,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:04,027 INFO L225 Difference]: With dead ends: 306 [2021-11-20 23:40:04,027 INFO L226 Difference]: Without dead ends: 166 [2021-11-20 23:40:04,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:40:04,028 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 30 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:04,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 335 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 161 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:40:04,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-20 23:40:04,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2021-11-20 23:40:04,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4635761589403973) internal successors, (221), 151 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 221 transitions. [2021-11-20 23:40:04,036 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 221 transitions. Word has length 56 [2021-11-20 23:40:04,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:04,036 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 221 transitions. [2021-11-20 23:40:04,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 221 transitions. [2021-11-20 23:40:04,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 23:40:04,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:04,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-20 23:40:04,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 23:40:04,038 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:04,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:04,039 INFO L85 PathProgramCache]: Analyzing trace with hash 845165453, now seen corresponding path program 1 times [2021-11-20 23:40:04,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:04,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457146909] [2021-11-20 23:40:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:04,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:04,104 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:04,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457146909] [2021-11-20 23:40:04,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457146909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:04,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:04,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:40:04,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618512829] [2021-11-20 23:40:04,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:04,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:40:04,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:04,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:40:04,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:40:04,106 INFO L87 Difference]: Start difference. First operand 152 states and 221 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:06,117 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:06,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:06,417 INFO L93 Difference]: Finished difference Result 306 states and 445 transitions. [2021-11-20 23:40:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:40:06,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-20 23:40:06,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:06,420 INFO L225 Difference]: With dead ends: 306 [2021-11-20 23:40:06,420 INFO L226 Difference]: Without dead ends: 166 [2021-11-20 23:40:06,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:40:06,421 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 25 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:06,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 335 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 161 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:40:06,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-20 23:40:06,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2021-11-20 23:40:06,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4569536423841059) internal successors, (220), 151 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:06,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 220 transitions. [2021-11-20 23:40:06,429 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 220 transitions. Word has length 56 [2021-11-20 23:40:06,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:06,429 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 220 transitions. [2021-11-20 23:40:06,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 220 transitions. [2021-11-20 23:40:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 23:40:06,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:06,430 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 23:40:06,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 23:40:06,430 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:06,431 INFO L85 PathProgramCache]: Analyzing trace with hash 591081496, now seen corresponding path program 1 times [2021-11-20 23:40:06,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:06,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191486387] [2021-11-20 23:40:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:06,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:06,517 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:06,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191486387] [2021-11-20 23:40:06,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191486387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:06,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:06,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:40:06,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249743918] [2021-11-20 23:40:06,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:06,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:40:06,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:06,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:40:06,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:40:06,520 INFO L87 Difference]: Start difference. First operand 152 states and 220 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:08,531 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:08,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:08,815 INFO L93 Difference]: Finished difference Result 306 states and 443 transitions. [2021-11-20 23:40:08,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:40:08,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-20 23:40:08,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:08,817 INFO L225 Difference]: With dead ends: 306 [2021-11-20 23:40:08,817 INFO L226 Difference]: Without dead ends: 166 [2021-11-20 23:40:08,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:40:08,818 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 23 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:08,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 336 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 160 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:40:08,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-20 23:40:08,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2021-11-20 23:40:08,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4503311258278146) internal successors, (219), 151 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:08,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 219 transitions. [2021-11-20 23:40:08,826 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 219 transitions. Word has length 56 [2021-11-20 23:40:08,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:08,826 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 219 transitions. [2021-11-20 23:40:08,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:08,827 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 219 transitions. [2021-11-20 23:40:08,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 23:40:08,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:08,828 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:40:08,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 23:40:08,828 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:08,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:08,829 INFO L85 PathProgramCache]: Analyzing trace with hash -730060381, now seen corresponding path program 1 times [2021-11-20 23:40:08,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:08,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176770820] [2021-11-20 23:40:08,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:08,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:08,886 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:08,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176770820] [2021-11-20 23:40:08,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176770820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:08,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:08,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:40:08,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011949102] [2021-11-20 23:40:08,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:08,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:40:08,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:08,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:40:08,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:40:08,889 INFO L87 Difference]: Start difference. First operand 152 states and 219 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:10,900 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:11,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:11,211 INFO L93 Difference]: Finished difference Result 306 states and 441 transitions. [2021-11-20 23:40:11,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:40:11,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-20 23:40:11,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:11,214 INFO L225 Difference]: With dead ends: 306 [2021-11-20 23:40:11,214 INFO L226 Difference]: Without dead ends: 166 [2021-11-20 23:40:11,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:40:11,215 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 27 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:11,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 335 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 161 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:40:11,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-20 23:40:11,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2021-11-20 23:40:11,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4437086092715232) internal successors, (218), 151 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:11,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 218 transitions. [2021-11-20 23:40:11,222 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 218 transitions. Word has length 57 [2021-11-20 23:40:11,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:11,223 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 218 transitions. [2021-11-20 23:40:11,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:11,223 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 218 transitions. [2021-11-20 23:40:11,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 23:40:11,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:11,224 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 23:40:11,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 23:40:11,225 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:11,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:11,225 INFO L85 PathProgramCache]: Analyzing trace with hash 454217721, now seen corresponding path program 1 times [2021-11-20 23:40:11,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:11,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742842499] [2021-11-20 23:40:11,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:11,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:11,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:11,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742842499] [2021-11-20 23:40:11,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742842499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:11,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:11,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:40:11,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831964642] [2021-11-20 23:40:11,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:11,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:40:11,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:11,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:40:11,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:40:11,301 INFO L87 Difference]: Start difference. First operand 152 states and 218 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:13,312 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:13,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:13,652 INFO L93 Difference]: Finished difference Result 304 states and 437 transitions. [2021-11-20 23:40:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:40:13,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-20 23:40:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:13,655 INFO L225 Difference]: With dead ends: 304 [2021-11-20 23:40:13,655 INFO L226 Difference]: Without dead ends: 164 [2021-11-20 23:40:13,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:40:13,657 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 22 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:13,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 339 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 157 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:40:13,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-20 23:40:13,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 152. [2021-11-20 23:40:13,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4370860927152318) internal successors, (217), 151 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 217 transitions. [2021-11-20 23:40:13,664 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 217 transitions. Word has length 57 [2021-11-20 23:40:13,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:13,664 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 217 transitions. [2021-11-20 23:40:13,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 217 transitions. [2021-11-20 23:40:13,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 23:40:13,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:13,666 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-20 23:40:13,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 23:40:13,666 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:13,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:13,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1996067460, now seen corresponding path program 1 times [2021-11-20 23:40:13,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:13,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088199674] [2021-11-20 23:40:13,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:13,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:13,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:13,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088199674] [2021-11-20 23:40:13,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088199674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:13,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:13,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:40:13,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685115331] [2021-11-20 23:40:13,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:13,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:40:13,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:13,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:40:13,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:40:13,724 INFO L87 Difference]: Start difference. First operand 152 states and 217 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:15,735 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:16,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:16,046 INFO L93 Difference]: Finished difference Result 304 states and 435 transitions. [2021-11-20 23:40:16,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:40:16,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-20 23:40:16,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:16,048 INFO L225 Difference]: With dead ends: 304 [2021-11-20 23:40:16,048 INFO L226 Difference]: Without dead ends: 164 [2021-11-20 23:40:16,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:40:16,051 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 24 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:16,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 339 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 157 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:40:16,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-20 23:40:16,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 152. [2021-11-20 23:40:16,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4304635761589404) internal successors, (216), 151 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:16,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 216 transitions. [2021-11-20 23:40:16,062 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 216 transitions. Word has length 58 [2021-11-20 23:40:16,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:16,062 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 216 transitions. [2021-11-20 23:40:16,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:16,062 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 216 transitions. [2021-11-20 23:40:16,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 23:40:16,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:16,064 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-20 23:40:16,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 23:40:16,065 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:16,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:16,065 INFO L85 PathProgramCache]: Analyzing trace with hash -938752440, now seen corresponding path program 1 times [2021-11-20 23:40:16,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:16,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786654586] [2021-11-20 23:40:16,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:16,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:16,137 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:16,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786654586] [2021-11-20 23:40:16,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786654586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:16,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:16,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:40:16,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754026882] [2021-11-20 23:40:16,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:16,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:40:16,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:16,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:40:16,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:40:16,140 INFO L87 Difference]: Start difference. First operand 152 states and 216 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:18,153 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:18,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:18,449 INFO L93 Difference]: Finished difference Result 296 states and 424 transitions. [2021-11-20 23:40:18,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:40:18,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-20 23:40:18,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:18,452 INFO L225 Difference]: With dead ends: 296 [2021-11-20 23:40:18,452 INFO L226 Difference]: Without dead ends: 156 [2021-11-20 23:40:18,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:40:18,453 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 18 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:18,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 347 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:40:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-20 23:40:18,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2021-11-20 23:40:18,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.423841059602649) internal successors, (215), 151 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:18,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 215 transitions. [2021-11-20 23:40:18,462 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 215 transitions. Word has length 59 [2021-11-20 23:40:18,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:18,462 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 215 transitions. [2021-11-20 23:40:18,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:18,463 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 215 transitions. [2021-11-20 23:40:18,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 23:40:18,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:18,464 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:40:18,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 23:40:18,464 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:18,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:18,465 INFO L85 PathProgramCache]: Analyzing trace with hash 825321039, now seen corresponding path program 1 times [2021-11-20 23:40:18,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:18,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735797319] [2021-11-20 23:40:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:18,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:18,566 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:18,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735797319] [2021-11-20 23:40:18,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735797319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:40:18,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133153931] [2021-11-20 23:40:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:18,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:40:18,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:40:18,572 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:40:18,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:40:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:18,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:40:18,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:40:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:19,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:40:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 23:40:19,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133153931] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:40:19,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:40:19,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 5 [2021-11-20 23:40:19,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693663767] [2021-11-20 23:40:19,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:19,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:40:19,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:19,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:40:19,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:40:19,320 INFO L87 Difference]: Start difference. First operand 152 states and 215 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:21,331 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:21,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:21,468 INFO L93 Difference]: Finished difference Result 292 states and 417 transitions. [2021-11-20 23:40:21,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:40:21,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 23:40:21,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:21,475 INFO L225 Difference]: With dead ends: 292 [2021-11-20 23:40:21,475 INFO L226 Difference]: Without dead ends: 290 [2021-11-20 23:40:21,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:40:21,476 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 116 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:21,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 276 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 23:40:21,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-20 23:40:21,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 286. [2021-11-20 23:40:21,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.4456140350877194) internal successors, (412), 285 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:21,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 412 transitions. [2021-11-20 23:40:21,490 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 412 transitions. Word has length 62 [2021-11-20 23:40:21,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:21,491 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 412 transitions. [2021-11-20 23:40:21,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:21,491 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 412 transitions. [2021-11-20 23:40:21,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 23:40:21,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:21,493 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 23:40:21,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:40:21,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:40:21,719 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:21,720 INFO L85 PathProgramCache]: Analyzing trace with hash -795916946, now seen corresponding path program 1 times [2021-11-20 23:40:21,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:21,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338462716] [2021-11-20 23:40:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:21,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:21,833 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:21,833 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:21,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338462716] [2021-11-20 23:40:21,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338462716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:40:21,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341968309] [2021-11-20 23:40:21,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:21,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:40:21,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:40:21,835 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:40:21,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:40:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:22,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:40:22,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:40:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:22,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:40:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 23:40:22,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341968309] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:40:22,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:40:22,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 5 [2021-11-20 23:40:22,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331382978] [2021-11-20 23:40:22,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:22,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:40:22,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:22,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:40:22,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:40:22,437 INFO L87 Difference]: Start difference. First operand 286 states and 412 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:24,448 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:24,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:24,588 INFO L93 Difference]: Finished difference Result 556 states and 807 transitions. [2021-11-20 23:40:24,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:40:24,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-20 23:40:24,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:24,592 INFO L225 Difference]: With dead ends: 556 [2021-11-20 23:40:24,592 INFO L226 Difference]: Without dead ends: 554 [2021-11-20 23:40:24,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:40:24,594 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 111 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:24,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 274 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 23:40:24,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-20 23:40:24,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 540. [2021-11-20 23:40:24,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.4564007421150278) internal successors, (785), 539 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:24,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 785 transitions. [2021-11-20 23:40:24,621 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 785 transitions. Word has length 68 [2021-11-20 23:40:24,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:24,622 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 785 transitions. [2021-11-20 23:40:24,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:24,622 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 785 transitions. [2021-11-20 23:40:24,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 23:40:24,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:24,624 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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 23:40:24,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:40:24,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 23:40:24,851 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:24,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:24,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2143806460, now seen corresponding path program 1 times [2021-11-20 23:40:24,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:24,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582390178] [2021-11-20 23:40:24,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:24,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:25,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:25,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582390178] [2021-11-20 23:40:25,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582390178] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:40:25,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686718312] [2021-11-20 23:40:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:25,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:40:25,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:40:25,027 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:40:25,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:40:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:25,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:40:25,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:40:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:25,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:40:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 23:40:26,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686718312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:40:26,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1589770118] [2021-11-20 23:40:26,221 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2021-11-20 23:40:26,221 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:40:26,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:40:26,231 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:40:26,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:40:26,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:40:26,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:40:26,967 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Some non-self update cases but no top-level DER relation at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:340) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:278) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:264) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 23:40:26,971 INFO L158 Benchmark]: Toolchain (without parser) took 59467.45ms. Allocated memory was 96.5MB in the beginning and 172.0MB in the end (delta: 75.5MB). Free memory was 58.1MB in the beginning and 72.9MB in the end (delta: -14.8MB). Peak memory consumption was 96.8MB. Max. memory is 16.1GB. [2021-11-20 23:40:26,972 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 96.5MB. Free memory was 68.9MB in the beginning and 68.9MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:40:26,972 INFO L158 Benchmark]: CACSL2BoogieTranslator took 779.54ms. Allocated memory was 96.5MB in the beginning and 121.6MB in the end (delta: 25.2MB). Free memory was 57.8MB in the beginning and 75.0MB in the end (delta: -17.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 23:40:26,972 INFO L158 Benchmark]: Boogie Procedure Inliner took 105.33ms. Allocated memory is still 121.6MB. Free memory was 75.0MB in the beginning and 69.7MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 23:40:26,973 INFO L158 Benchmark]: Boogie Preprocessor took 86.29ms. Allocated memory is still 121.6MB. Free memory was 69.7MB in the beginning and 62.9MB in the end (delta: 6.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 23:40:26,973 INFO L158 Benchmark]: RCFGBuilder took 2373.70ms. Allocated memory was 121.6MB in the beginning and 172.0MB in the end (delta: 50.3MB). Free memory was 62.9MB in the beginning and 134.9MB in the end (delta: -72.0MB). Peak memory consumption was 38.0MB. Max. memory is 16.1GB. [2021-11-20 23:40:26,973 INFO L158 Benchmark]: TraceAbstraction took 56097.53ms. Allocated memory is still 172.0MB. Free memory was 134.9MB in the beginning and 72.9MB in the end (delta: 62.0MB). Peak memory consumption was 98.1MB. Max. memory is 16.1GB. [2021-11-20 23:40:26,975 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 96.5MB. Free memory was 68.9MB in the beginning and 68.9MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 779.54ms. Allocated memory was 96.5MB in the beginning and 121.6MB in the end (delta: 25.2MB). Free memory was 57.8MB in the beginning and 75.0MB in the end (delta: -17.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 105.33ms. Allocated memory is still 121.6MB. Free memory was 75.0MB in the beginning and 69.7MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 86.29ms. Allocated memory is still 121.6MB. Free memory was 69.7MB in the beginning and 62.9MB in the end (delta: 6.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 2373.70ms. Allocated memory was 121.6MB in the beginning and 172.0MB in the end (delta: 50.3MB). Free memory was 62.9MB in the beginning and 134.9MB in the end (delta: -72.0MB). Peak memory consumption was 38.0MB. Max. memory is 16.1GB. * TraceAbstraction took 56097.53ms. Allocated memory is still 172.0MB. Free memory was 134.9MB in the beginning and 72.9MB in the end (delta: 62.0MB). Peak memory consumption was 98.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Some non-self update cases but no top-level DER relation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Some non-self update cases but no top-level DER relation: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-20 23:40:27,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/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_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/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 8c6f82e874e2f980b653c53fa0437dd3390b1771d726d8f345336fe56afb2bb6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:40:29,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:40:29,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:40:29,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:40:29,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:40:29,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:40:29,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:40:29,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:40:29,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:40:29,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:40:29,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:40:29,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:40:29,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:40:29,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:40:29,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:40:29,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:40:29,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:40:29,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:40:29,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:40:29,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:40:29,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:40:29,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:40:29,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:40:29,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:40:29,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:40:29,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:40:29,528 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:40:29,531 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:40:29,531 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:40:29,532 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:40:29,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:40:29,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:40:29,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:40:29,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:40:29,538 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:40:29,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:40:29,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:40:29,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:40:29,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:40:29,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:40:29,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:40:29,546 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-20 23:40:29,576 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:40:29,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:40:29,577 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:40:29,577 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:40:29,578 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:40:29,578 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:40:29,578 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:40:29,579 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:40:29,579 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:40:29,579 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:40:29,579 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:40:29,579 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:40:29,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:40:29,581 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:40:29,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:40:29,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:40:29,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:40:29,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:40:29,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:40:29,582 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 23:40:29,582 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 23:40:29,582 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:40:29,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:40:29,583 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:40:29,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:40:29,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:40:29,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 23:40:29,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:40:29,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:40:29,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:40:29,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:40:29,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:40:29,585 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 23:40:29,585 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 23:40:29,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:40:29,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:40:29,586 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:40:29,586 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_b50b2a00-f00e-4a15-aadf-96f15f5959a6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c6f82e874e2f980b653c53fa0437dd3390b1771d726d8f345336fe56afb2bb6 [2021-11-20 23:40:29,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:40:30,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:40:30,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:40:30,011 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:40:30,012 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:40:30,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c [2021-11-20 23:40:30,091 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/data/f377f0a56/ea88e1fb14be4186b72035fe0e072768/FLAGba1a66f41 [2021-11-20 23:40:30,829 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:40:30,832 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c [2021-11-20 23:40:30,867 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/data/f377f0a56/ea88e1fb14be4186b72035fe0e072768/FLAGba1a66f41 [2021-11-20 23:40:30,993 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/data/f377f0a56/ea88e1fb14be4186b72035fe0e072768 [2021-11-20 23:40:30,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:40:30,999 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:40:31,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:40:31,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:40:31,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:40:31,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:40:30" (1/1) ... [2021-11-20 23:40:31,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e275926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:31, skipping insertion in model container [2021-11-20 23:40:31,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:40:30" (1/1) ... [2021-11-20 23:40:31,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:40:31,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:40:31,605 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_b50b2a00-f00e-4a15-aadf-96f15f5959a6/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c[74369,74382] [2021-11-20 23:40:31,621 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:40:31,647 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:40:31,832 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_b50b2a00-f00e-4a15-aadf-96f15f5959a6/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c[74369,74382] [2021-11-20 23:40:31,835 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:40:31,863 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:40:31,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:31 WrapperNode [2021-11-20 23:40:31,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:40:31,865 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:40:31,865 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:40:31,865 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:40:31,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:31" (1/1) ... [2021-11-20 23:40:31,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:31" (1/1) ... [2021-11-20 23:40:31,983 INFO L137 Inliner]: procedures = 35, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 762 [2021-11-20 23:40:31,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:40:31,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:40:31,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:40:31,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:40:31,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:31" (1/1) ... [2021-11-20 23:40:31,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:31" (1/1) ... [2021-11-20 23:40:32,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:31" (1/1) ... [2021-11-20 23:40:32,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:31" (1/1) ... [2021-11-20 23:40:32,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:31" (1/1) ... [2021-11-20 23:40:32,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:31" (1/1) ... [2021-11-20 23:40:32,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:31" (1/1) ... [2021-11-20 23:40:32,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:40:32,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:40:32,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:40:32,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:40:32,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:31" (1/1) ... [2021-11-20 23:40:32,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:40:32,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:40:32,176 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:40:32,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:40:32,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:40:32,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 23:40:32,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:40:32,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 23:40:32,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:40:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:40:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:40:32,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:40:32,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 23:40:32,487 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:40:32,489 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:40:32,515 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 23:40:36,920 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-20 23:40:36,921 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-20 23:40:36,921 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:40:36,929 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:40:36,930 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:40:36,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:40:36 BoogieIcfgContainer [2021-11-20 23:40:36,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:40:36,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:40:36,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:40:36,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:40:36,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:40:30" (1/3) ... [2021-11-20 23:40:36,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6851be31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:40:36, skipping insertion in model container [2021-11-20 23:40:36,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:40:31" (2/3) ... [2021-11-20 23:40:36,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6851be31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:40:36, skipping insertion in model container [2021-11-20 23:40:36,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:40:36" (3/3) ... [2021-11-20 23:40:36,940 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.07.i.cil-2.c [2021-11-20 23:40:36,955 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:40:36,955 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:40:37,004 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:40:37,011 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 23:40:37,011 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:40:37,031 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:37,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 23:40:37,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:37,041 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] [2021-11-20 23:40:37,042 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:37,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:37,048 INFO L85 PathProgramCache]: Analyzing trace with hash -442385418, now seen corresponding path program 1 times [2021-11-20 23:40:37,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:40:37,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031637696] [2021-11-20 23:40:37,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:37,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:40:37,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:40:37,069 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:40:37,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 23:40:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:37,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:40:37,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:40:37,641 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 23:40:37,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:40:37,919 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 23:40:37,920 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:40:37,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031637696] [2021-11-20 23:40:37,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031637696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:37,922 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:37,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:40:37,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874302164] [2021-11-20 23:40:37,926 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:37,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:40:37,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:40:37,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:40:37,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:40:37,987 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:38,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:38,265 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-11-20 23:40:38,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:40:38,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-20 23:40:38,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:38,282 INFO L225 Difference]: With dead ends: 566 [2021-11-20 23:40:38,282 INFO L226 Difference]: Without dead ends: 387 [2021-11-20 23:40:38,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:40:38,290 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 402 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:38,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 670 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:40:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-20 23:40:38,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-11-20 23:40:38,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5286458333333333) internal successors, (587), 384 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-11-20 23:40:38,363 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-11-20 23:40:38,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:38,364 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-11-20 23:40:38,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:38,365 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-11-20 23:40:38,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 23:40:38,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:38,369 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:40:38,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:40:38,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:40:38,583 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:38,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:38,584 INFO L85 PathProgramCache]: Analyzing trace with hash 746604405, now seen corresponding path program 1 times [2021-11-20 23:40:38,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:40:38,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231194208] [2021-11-20 23:40:38,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:38,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:40:38,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:40:38,587 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:40:38,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 23:40:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:38,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:40:38,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:40:39,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:39,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:40:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:39,446 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:40:39,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231194208] [2021-11-20 23:40:39,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231194208] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:39,447 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:39,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:40:39,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823025633] [2021-11-20 23:40:39,448 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:39,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:40:39,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:40:39,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:40:39,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:40:39,455 INFO L87 Difference]: Start difference. First operand 385 states and 587 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:39,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:39,733 INFO L93 Difference]: Finished difference Result 879 states and 1353 transitions. [2021-11-20 23:40:39,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:40:39,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-20 23:40:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:39,739 INFO L225 Difference]: With dead ends: 879 [2021-11-20 23:40:39,739 INFO L226 Difference]: Without dead ends: 628 [2021-11-20 23:40:39,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:40:39,744 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 305 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:39,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 721 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:40:39,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-11-20 23:40:39,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 626. [2021-11-20 23:40:39,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 1.52) internal successors, (950), 625 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:39,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 950 transitions. [2021-11-20 23:40:39,791 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 950 transitions. Word has length 60 [2021-11-20 23:40:39,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:39,792 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 950 transitions. [2021-11-20 23:40:39,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:39,793 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 950 transitions. [2021-11-20 23:40:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 23:40:39,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:39,808 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:40:39,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:40:40,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:40:40,029 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:40,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:40,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1749353389, now seen corresponding path program 1 times [2021-11-20 23:40:40,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:40:40,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243575255] [2021-11-20 23:40:40,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:40,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:40:40,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:40:40,033 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:40:40,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 23:40:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:40,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:40:40,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:40:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 23:40:40,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:40:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 23:40:41,200 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:40:41,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243575255] [2021-11-20 23:40:41,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243575255] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:41,201 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:41,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 23:40:41,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921164733] [2021-11-20 23:40:41,202 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:41,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:40:41,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:40:41,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:40:41,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:40:41,203 INFO L87 Difference]: Start difference. First operand 626 states and 950 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:41,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:41,361 INFO L93 Difference]: Finished difference Result 1238 states and 1888 transitions. [2021-11-20 23:40:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:40:41,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-20 23:40:41,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:41,367 INFO L225 Difference]: With dead ends: 1238 [2021-11-20 23:40:41,368 INFO L226 Difference]: Without dead ends: 746 [2021-11-20 23:40:41,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 235 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 23:40:41,371 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 137 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:41,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 569 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:40:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-11-20 23:40:41,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 746. [2021-11-20 23:40:41,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 1.516778523489933) internal successors, (1130), 745 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:41,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1130 transitions. [2021-11-20 23:40:41,404 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1130 transitions. Word has length 119 [2021-11-20 23:40:41,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:41,404 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1130 transitions. [2021-11-20 23:40:41,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:41,405 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1130 transitions. [2021-11-20 23:40:41,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-20 23:40:41,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:41,410 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:40:41,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:40:41,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:40:41,621 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:41,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:41,621 INFO L85 PathProgramCache]: Analyzing trace with hash 433077792, now seen corresponding path program 1 times [2021-11-20 23:40:41,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:40:41,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313691391] [2021-11-20 23:40:41,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:41,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:40:41,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:40:41,625 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:40:41,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 23:40:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:41,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:40:41,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:40:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 23:40:42,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:40:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 23:40:42,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:40:42,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313691391] [2021-11-20 23:40:42,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313691391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:42,886 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:42,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:40:42,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108666038] [2021-11-20 23:40:42,887 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:42,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:40:42,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:40:42,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:40:42,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:40:42,890 INFO L87 Difference]: Start difference. First operand 746 states and 1130 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:43,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:43,159 INFO L93 Difference]: Finished difference Result 1605 states and 2443 transitions. [2021-11-20 23:40:43,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:40:43,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-20 23:40:43,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:43,169 INFO L225 Difference]: With dead ends: 1605 [2021-11-20 23:40:43,169 INFO L226 Difference]: Without dead ends: 993 [2021-11-20 23:40:43,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:40:43,176 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 296 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:43,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 731 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:40:43,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-11-20 23:40:43,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 993. [2021-11-20 23:40:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 1.5141129032258065) internal successors, (1502), 992 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:43,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1502 transitions. [2021-11-20 23:40:43,231 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1502 transitions. Word has length 143 [2021-11-20 23:40:43,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:43,233 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 1502 transitions. [2021-11-20 23:40:43,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:43,234 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1502 transitions. [2021-11-20 23:40:43,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-20 23:40:43,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:43,246 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 23:40:43,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:40:43,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:40:43,461 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:43,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:43,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1035961974, now seen corresponding path program 1 times [2021-11-20 23:40:43,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:40:43,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261011544] [2021-11-20 23:40:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:43,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:40:43,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:40:43,471 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:40:43,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 23:40:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:43,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 23:40:43,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:40:43,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:40:43,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:40:44,178 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-11-20 23:40:44,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 22 [2021-11-20 23:40:44,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:44,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:44,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:44,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 22 [2021-11-20 23:40:44,367 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-20 23:40:44,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-11-20 23:40:44,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:44,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-20 23:40:44,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-20 23:40:44,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-20 23:40:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-11-20 23:40:44,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:40:45,826 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-11-20 23:40:45,827 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:40:45,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261011544] [2021-11-20 23:40:45,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261011544] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:45,828 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:45,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-20 23:40:45,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331877128] [2021-11-20 23:40:45,828 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:45,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:40:45,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:40:45,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:40:45,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:40:45,830 INFO L87 Difference]: Start difference. First operand 993 states and 1502 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:47,854 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:49,869 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:51,882 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:56,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:56,405 INFO L93 Difference]: Finished difference Result 1983 states and 3000 transitions. [2021-11-20 23:40:56,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:40:56,407 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-11-20 23:40:56,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:56,414 INFO L225 Difference]: With dead ends: 1983 [2021-11-20 23:40:56,414 INFO L226 Difference]: Without dead ends: 993 [2021-11-20 23:40:56,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 323 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:40:56,416 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:56,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1136 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 271 Invalid, 3 Unknown, 58 Unchecked, 10.4s Time] [2021-11-20 23:40:56,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-11-20 23:40:56,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 993. [2021-11-20 23:40:56,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 1.5131048387096775) internal successors, (1501), 992 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1501 transitions. [2021-11-20 23:40:56,459 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1501 transitions. Word has length 166 [2021-11-20 23:40:56,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:56,461 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 1501 transitions. [2021-11-20 23:40:56,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:56,461 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1501 transitions. [2021-11-20 23:40:56,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-20 23:40:56,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:56,470 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 23:40:56,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:40:56,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:40:56,688 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:56,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:56,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1534397000, now seen corresponding path program 1 times [2021-11-20 23:40:56,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:40:56,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625665953] [2021-11-20 23:40:56,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:56,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:40:56,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:40:56,692 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:40:56,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50b2a00-f00e-4a15-aadf-96f15f5959a6/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 23:40:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:57,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 23:40:57,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:40:57,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:57,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:57,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:57,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:57,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:57,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:57,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:57,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:57,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:57,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:57,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 1656 treesize of output 1653 [2021-11-20 23:40:57,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:57,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 1958 treesize of output 1830 [2021-11-20 23:40:57,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:57,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:57,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:57,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:57,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:57,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:58,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:58,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:58,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:58,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:58,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:58,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 1740 treesize of output 1636 [2021-11-20 23:40:58,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1795 treesize of output 1725 [2021-11-20 23:40:58,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:58,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:58,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:58,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:58,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:40:58,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:42:34,174 WARN L227 SmtUtils]: Spent 1.60m on a formula simplification. DAG size of input: 151 DAG size of output: 74 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 23:42:34,176 INFO L354 Elim1Store]: treesize reduction 924, result has 19.7 percent of original size [2021-11-20 23:42:34,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 16 case distinctions, treesize of input 1788 treesize of output 1729 [2021-11-20 23:42:34,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:42:34,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:42:34,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2253 treesize of output 2055 [2021-11-20 23:42:34,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:42:34,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:43:23,898 WARN L227 SmtUtils]: Spent 49.59s on a formula simplification. DAG size of input: 205 DAG size of output: 60 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 23:43:23,899 INFO L354 Elim1Store]: treesize reduction 1616, result has 7.1 percent of original size [2021-11-20 23:43:23,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 13 new quantified variables, introduced 19 case distinctions, treesize of input 12172 treesize of output 8772 [2021-11-20 23:43:34,336 WARN L227 SmtUtils]: Spent 10.27s on a formula simplification. DAG size of input: 77 DAG size of output: 26 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 23:43:34,337 INFO L354 Elim1Store]: treesize reduction 482, result has 9.6 percent of original size [2021-11-20 23:43:34,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 10937 treesize of output 10930 [2021-11-20 23:43:37,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:43:37,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:43:37,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:01,758 WARN L227 SmtUtils]: Spent 24.65s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 23:44:01,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:44:01,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 674 treesize of output 1184 [2021-11-20 23:44:23,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:23,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:23,937 INFO L354 Elim1Store]: treesize reduction 136, result has 0.7 percent of original size [2021-11-20 23:44:23,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 366 treesize of output 168 [2021-11-20 23:44:24,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:24,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:24,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:24,432 INFO L354 Elim1Store]: treesize reduction 1086, result has 0.3 percent of original size [2021-11-20 23:44:24,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 2532 treesize of output 1894 [2021-11-20 23:44:24,570 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-20 23:44:24,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 1815 treesize of output 1403