./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7 --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 b9a657fa9aacca0974ed9e42f1311e36e1c5af368a54222ebad4a487f8951064 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:37:16,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:37:16,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:37:16,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:37:16,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:37:16,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:37:16,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:37:16,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:37:16,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:37:16,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:37:16,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:37:16,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:37:16,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:37:16,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:37:16,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:37:16,178 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:37:16,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:37:16,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:37:16,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:37:16,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:37:16,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:37:16,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:37:16,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:37:16,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:37:16,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:37:16,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:37:16,203 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:37:16,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:37:16,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:37:16,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:37:16,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:37:16,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:37:16,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:37:16,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:37:16,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:37:16,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:37:16,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:37:16,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:37:16,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:37:16,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:37:16,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:37:16,216 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:37:16,263 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:37:16,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:37:16,263 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:37:16,263 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:37:16,264 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:37:16,264 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:37:16,264 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:37:16,265 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:37:16,265 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:37:16,265 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:37:16,265 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:37:16,265 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:37:16,265 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:37:16,266 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:37:16,266 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:37:16,266 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:37:16,266 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:37:16,266 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:37:16,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:37:16,267 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:37:16,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:37:16,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:37:16,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:37:16,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:37:16,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:37:16,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:37:16,275 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:37:16,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:37:16,276 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:37:16,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:37:16,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:37:16,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:37:16,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:37:16,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:37:16,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:37:16,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:37:16,278 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:37:16,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:37:16,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:37:16,279 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:37:16,279 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:37:16,279 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_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9a657fa9aacca0974ed9e42f1311e36e1c5af368a54222ebad4a487f8951064 [2021-11-25 19:37:16,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:37:16,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:37:16,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:37:16,643 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:37:16,644 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:37:16,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-1.c [2021-11-25 19:37:16,715 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/data/91ec88722/0312a91ad81c4bc9aaa15e6aad39f54d/FLAGa2c3528fb [2021-11-25 19:37:17,379 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:37:17,380 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-1.c [2021-11-25 19:37:17,402 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/data/91ec88722/0312a91ad81c4bc9aaa15e6aad39f54d/FLAGa2c3528fb [2021-11-25 19:37:17,602 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/data/91ec88722/0312a91ad81c4bc9aaa15e6aad39f54d [2021-11-25 19:37:17,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:37:17,606 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:37:17,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:37:17,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:37:17,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:37:17,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:37:17" (1/1) ... [2021-11-25 19:37:17,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15784081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:17, skipping insertion in model container [2021-11-25 19:37:17,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:37:17" (1/1) ... [2021-11-25 19:37:17,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:37:17,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:37:18,146 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_1065a45a-683f-4344-9c05-bd1cb39a40d9/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-1.c[73581,73594] [2021-11-25 19:37:18,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:37:18,185 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:37:18,374 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_1065a45a-683f-4344-9c05-bd1cb39a40d9/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-1.c[73581,73594] [2021-11-25 19:37:18,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:37:18,402 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:37:18,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:18 WrapperNode [2021-11-25 19:37:18,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:37:18,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:37:18,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:37:18,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:37:18,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:18" (1/1) ... [2021-11-25 19:37:18,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:18" (1/1) ... [2021-11-25 19:37:18,500 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 788 [2021-11-25 19:37:18,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:37:18,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:37:18,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:37:18,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:37:18,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:18" (1/1) ... [2021-11-25 19:37:18,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:18" (1/1) ... [2021-11-25 19:37:18,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:18" (1/1) ... [2021-11-25 19:37:18,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:18" (1/1) ... [2021-11-25 19:37:18,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:18" (1/1) ... [2021-11-25 19:37:18,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:18" (1/1) ... [2021-11-25 19:37:18,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:18" (1/1) ... [2021-11-25 19:37:18,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:37:18,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:37:18,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:37:18,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:37:18,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:18" (1/1) ... [2021-11-25 19:37:18,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:37:18,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:37:18,662 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:37:18,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:37:18,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:37:18,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:37:18,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:37:18,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:37:18,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:37:18,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:37:18,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:37:18,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:37:18,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:37:18,976 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:37:18,987 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:37:19,008 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-25 19:37:20,561 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-25 19:37:20,561 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-25 19:37:20,561 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:37:20,936 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:37:20,936 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:37:20,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:37:20 BoogieIcfgContainer [2021-11-25 19:37:20,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:37:20,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:37:20,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:37:20,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:37:20,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:37:17" (1/3) ... [2021-11-25 19:37:20,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bdc76b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:37:20, skipping insertion in model container [2021-11-25 19:37:20,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:18" (2/3) ... [2021-11-25 19:37:20,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bdc76b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:37:20, skipping insertion in model container [2021-11-25 19:37:20,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:37:20" (3/3) ... [2021-11-25 19:37:20,949 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.10.i.cil-1.c [2021-11-25 19:37:20,955 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:37:20,955 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:37:21,021 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:37:21,036 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 [2021-11-25 19:37:21,038 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:37:21,060 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) [2021-11-25 19:37:21,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 19:37:21,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:21,068 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] [2021-11-25 19:37:21,069 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:21,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:21,074 INFO L85 PathProgramCache]: Analyzing trace with hash -866114684, now seen corresponding path program 1 times [2021-11-25 19:37:21,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:21,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470937225] [2021-11-25 19:37:21,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:21,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:37:21,798 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:21,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470937225] [2021-11-25 19:37:21,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470937225] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:21,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:21,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:37:21,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690541362] [2021-11-25 19:37:21,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:21,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:37:21,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:21,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:37:21,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:37:21,839 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 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-11-25 19:37:23,863 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:24,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:24,507 INFO L93 Difference]: Finished difference Result 320 states and 552 transitions. [2021-11-25 19:37:24,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:37:24,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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 36 [2021-11-25 19:37:24,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:24,527 INFO L225 Difference]: With dead ends: 320 [2021-11-25 19:37:24,527 INFO L226 Difference]: Without dead ends: 207 [2021-11-25 19:37:24,535 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 [2021-11-25 19:37:24,540 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 115 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:24,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 297 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-25 19:37:24,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-25 19:37:24,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 143. [2021-11-25 19:37:24,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.5985915492957747) internal successors, (227), 142 states have internal predecessors, (227), 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) [2021-11-25 19:37:24,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 227 transitions. [2021-11-25 19:37:24,614 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 227 transitions. Word has length 36 [2021-11-25 19:37:24,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:24,615 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 227 transitions. [2021-11-25 19:37:24,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-11-25 19:37:24,615 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 227 transitions. [2021-11-25 19:37:24,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 19:37:24,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:24,617 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] [2021-11-25 19:37:24,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:37:24,618 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:24,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:24,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1282158023, now seen corresponding path program 1 times [2021-11-25 19:37:24,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:24,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338362971] [2021-11-25 19:37:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:24,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:37:24,877 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:24,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338362971] [2021-11-25 19:37:24,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338362971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:24,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:24,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:37:24,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128046543] [2021-11-25 19:37:24,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:24,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:37:24,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:24,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:37:24,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:37:24,880 INFO L87 Difference]: Start difference. First operand 143 states and 227 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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) [2021-11-25 19:37:26,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:27,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:27,390 INFO L93 Difference]: Finished difference Result 385 states and 606 transitions. [2021-11-25 19:37:27,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:37:27,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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 [2021-11-25 19:37:27,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:27,394 INFO L225 Difference]: With dead ends: 385 [2021-11-25 19:37:27,394 INFO L226 Difference]: Without dead ends: 244 [2021-11-25 19:37:27,396 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 [2021-11-25 19:37:27,397 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 91 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:27,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 241 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 227 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 19:37:27,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-25 19:37:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 181. [2021-11-25 19:37:27,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.65) internal successors, (297), 180 states have internal predecessors, (297), 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) [2021-11-25 19:37:27,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 297 transitions. [2021-11-25 19:37:27,414 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 297 transitions. Word has length 37 [2021-11-25 19:37:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:27,415 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 297 transitions. [2021-11-25 19:37:27,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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) [2021-11-25 19:37:27,415 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 297 transitions. [2021-11-25 19:37:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-25 19:37:27,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:27,419 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:27,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:37:27,419 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:27,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:27,420 INFO L85 PathProgramCache]: Analyzing trace with hash -828463340, now seen corresponding path program 1 times [2021-11-25 19:37:27,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:27,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613618669] [2021-11-25 19:37:27,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:27,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 19:37:27,617 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:27,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613618669] [2021-11-25 19:37:27,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613618669] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:27,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:27,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:37:27,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400473144] [2021-11-25 19:37:27,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:27,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:37:27,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:27,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:37:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:37:27,620 INFO L87 Difference]: Start difference. First operand 181 states and 297 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-25 19:37:29,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:29,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:29,986 INFO L93 Difference]: Finished difference Result 382 states and 625 transitions. [2021-11-25 19:37:29,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:37:29,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-25 19:37:29,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:29,988 INFO L225 Difference]: With dead ends: 382 [2021-11-25 19:37:29,988 INFO L226 Difference]: Without dead ends: 203 [2021-11-25 19:37:29,990 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 [2021-11-25 19:37:29,991 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 11 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:29,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 328 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 145 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:37:29,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-25 19:37:30,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 191. [2021-11-25 19:37:30,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.6578947368421053) internal successors, (315), 190 states have internal predecessors, (315), 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) [2021-11-25 19:37:30,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 315 transitions. [2021-11-25 19:37:30,012 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 315 transitions. Word has length 64 [2021-11-25 19:37:30,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:30,013 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 315 transitions. [2021-11-25 19:37:30,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-25 19:37:30,013 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 315 transitions. [2021-11-25 19:37:30,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 19:37:30,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:30,017 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:30,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:37:30,017 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:30,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:30,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2096963436, now seen corresponding path program 1 times [2021-11-25 19:37:30,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:30,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789297217] [2021-11-25 19:37:30,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:30,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:37:30,190 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:30,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789297217] [2021-11-25 19:37:30,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789297217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:30,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:30,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:37:30,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745941069] [2021-11-25 19:37:30,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:30,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:37:30,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:30,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:37:30,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:37:30,193 INFO L87 Difference]: Start difference. First operand 191 states and 315 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-11-25 19:37:32,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:32,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:32,640 INFO L93 Difference]: Finished difference Result 433 states and 693 transitions. [2021-11-25 19:37:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:37:32,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 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 74 [2021-11-25 19:37:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:32,643 INFO L225 Difference]: With dead ends: 433 [2021-11-25 19:37:32,643 INFO L226 Difference]: Without dead ends: 254 [2021-11-25 19:37:32,644 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 [2021-11-25 19:37:32,645 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 120 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:32,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 242 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 226 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:37:32,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-25 19:37:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 191. [2021-11-25 19:37:32,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.6421052631578947) internal successors, (312), 190 states have internal predecessors, (312), 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) [2021-11-25 19:37:32,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 312 transitions. [2021-11-25 19:37:32,660 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 312 transitions. Word has length 74 [2021-11-25 19:37:32,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:32,661 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 312 transitions. [2021-11-25 19:37:32,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-11-25 19:37:32,661 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 312 transitions. [2021-11-25 19:37:32,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 19:37:32,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:32,665 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:32,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:37:32,666 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:32,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:32,666 INFO L85 PathProgramCache]: Analyzing trace with hash 936648216, now seen corresponding path program 1 times [2021-11-25 19:37:32,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:32,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671580241] [2021-11-25 19:37:32,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:32,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:37:32,829 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:32,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671580241] [2021-11-25 19:37:32,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671580241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:32,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:32,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:37:32,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058026632] [2021-11-25 19:37:32,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:32,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:37:32,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:32,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:37:32,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:37:32,832 INFO L87 Difference]: Start difference. First operand 191 states and 312 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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) [2021-11-25 19:37:34,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:35,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:35,202 INFO L93 Difference]: Finished difference Result 382 states and 619 transitions. [2021-11-25 19:37:35,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:37:35,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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 75 [2021-11-25 19:37:35,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:35,204 INFO L225 Difference]: With dead ends: 382 [2021-11-25 19:37:35,205 INFO L226 Difference]: Without dead ends: 203 [2021-11-25 19:37:35,205 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 [2021-11-25 19:37:35,206 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 17 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:35,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 330 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:37:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-25 19:37:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 191. [2021-11-25 19:37:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.6368421052631579) internal successors, (311), 190 states have internal predecessors, (311), 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) [2021-11-25 19:37:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 311 transitions. [2021-11-25 19:37:35,217 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 311 transitions. Word has length 75 [2021-11-25 19:37:35,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:35,217 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 311 transitions. [2021-11-25 19:37:35,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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) [2021-11-25 19:37:35,218 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 311 transitions. [2021-11-25 19:37:35,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 19:37:35,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:35,221 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:35,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:37:35,222 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:35,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:35,222 INFO L85 PathProgramCache]: Analyzing trace with hash 74368712, now seen corresponding path program 1 times [2021-11-25 19:37:35,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:35,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616028732] [2021-11-25 19:37:35,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:35,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:37:35,433 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:35,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616028732] [2021-11-25 19:37:35,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616028732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:35,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:35,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:37:35,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123915970] [2021-11-25 19:37:35,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:35,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:37:35,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:35,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:37:35,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:37:35,438 INFO L87 Difference]: Start difference. First operand 191 states and 311 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-11-25 19:37:37,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:37,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:37,890 INFO L93 Difference]: Finished difference Result 433 states and 687 transitions. [2021-11-25 19:37:37,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:37:37,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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 76 [2021-11-25 19:37:37,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:37,893 INFO L225 Difference]: With dead ends: 433 [2021-11-25 19:37:37,893 INFO L226 Difference]: Without dead ends: 254 [2021-11-25 19:37:37,894 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 [2021-11-25 19:37:37,895 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 117 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:37,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 241 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 227 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:37:37,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-25 19:37:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 191. [2021-11-25 19:37:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.6210526315789473) internal successors, (308), 190 states have internal predecessors, (308), 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) [2021-11-25 19:37:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 308 transitions. [2021-11-25 19:37:37,905 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 308 transitions. Word has length 76 [2021-11-25 19:37:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:37,905 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 308 transitions. [2021-11-25 19:37:37,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-11-25 19:37:37,906 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 308 transitions. [2021-11-25 19:37:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 19:37:37,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:37,909 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:37,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:37:37,910 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:37,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:37,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1658516745, now seen corresponding path program 1 times [2021-11-25 19:37:37,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:37,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214573070] [2021-11-25 19:37:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:37,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:37:38,133 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:38,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214573070] [2021-11-25 19:37:38,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214573070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:38,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:38,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:37:38,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586680143] [2021-11-25 19:37:38,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:38,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:37:38,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:38,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:37:38,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:37:38,136 INFO L87 Difference]: Start difference. First operand 191 states and 308 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-11-25 19:37:40,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:40,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:40,456 INFO L93 Difference]: Finished difference Result 382 states and 613 transitions. [2021-11-25 19:37:40,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:37:40,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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 76 [2021-11-25 19:37:40,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:40,459 INFO L225 Difference]: With dead ends: 382 [2021-11-25 19:37:40,459 INFO L226 Difference]: Without dead ends: 203 [2021-11-25 19:37:40,460 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 [2021-11-25 19:37:40,461 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 11 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:40,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 330 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:37:40,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-25 19:37:40,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 191. [2021-11-25 19:37:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.6157894736842104) internal successors, (307), 190 states have internal predecessors, (307), 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) [2021-11-25 19:37:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 307 transitions. [2021-11-25 19:37:40,472 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 307 transitions. Word has length 76 [2021-11-25 19:37:40,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:40,472 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 307 transitions. [2021-11-25 19:37:40,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-11-25 19:37:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 307 transitions. [2021-11-25 19:37:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 19:37:40,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:40,474 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:40,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:37:40,475 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:40,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:40,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1032272713, now seen corresponding path program 1 times [2021-11-25 19:37:40,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:40,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420226881] [2021-11-25 19:37:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:40,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:37:40,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:40,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420226881] [2021-11-25 19:37:40,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420226881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:40,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:40,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:37:40,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813072299] [2021-11-25 19:37:40,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:40,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:37:40,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:40,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:37:40,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:37:40,637 INFO L87 Difference]: Start difference. First operand 191 states and 307 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-11-25 19:37:42,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:42,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:42,965 INFO L93 Difference]: Finished difference Result 382 states and 612 transitions. [2021-11-25 19:37:42,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:37:42,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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 76 [2021-11-25 19:37:42,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:42,967 INFO L225 Difference]: With dead ends: 382 [2021-11-25 19:37:42,968 INFO L226 Difference]: Without dead ends: 203 [2021-11-25 19:37:42,968 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 [2021-11-25 19:37:42,969 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 9 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:42,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 331 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 142 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:37:42,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-25 19:37:42,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 191. [2021-11-25 19:37:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.6105263157894736) internal successors, (306), 190 states have internal predecessors, (306), 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) [2021-11-25 19:37:42,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 306 transitions. [2021-11-25 19:37:42,977 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 306 transitions. Word has length 76 [2021-11-25 19:37:42,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:42,977 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 306 transitions. [2021-11-25 19:37:42,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-11-25 19:37:42,978 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 306 transitions. [2021-11-25 19:37:42,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 19:37:42,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:42,979 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:42,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:37:42,979 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:42,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:42,980 INFO L85 PathProgramCache]: Analyzing trace with hash 2056225049, now seen corresponding path program 1 times [2021-11-25 19:37:42,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:42,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897481461] [2021-11-25 19:37:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:42,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:37:43,156 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:43,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897481461] [2021-11-25 19:37:43,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897481461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:43,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:43,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:37:43,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684466321] [2021-11-25 19:37:43,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:43,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:37:43,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:43,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:37:43,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:37:43,160 INFO L87 Difference]: Start difference. First operand 191 states and 306 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-25 19:37:45,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:45,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:45,467 INFO L93 Difference]: Finished difference Result 380 states and 609 transitions. [2021-11-25 19:37:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:37:45,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-25 19:37:45,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:45,469 INFO L225 Difference]: With dead ends: 380 [2021-11-25 19:37:45,470 INFO L226 Difference]: Without dead ends: 201 [2021-11-25 19:37:45,470 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 [2021-11-25 19:37:45,471 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 9 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:45,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 334 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:37:45,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-25 19:37:45,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 191. [2021-11-25 19:37:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.605263157894737) internal successors, (305), 190 states have internal predecessors, (305), 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) [2021-11-25 19:37:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 305 transitions. [2021-11-25 19:37:45,479 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 305 transitions. Word has length 77 [2021-11-25 19:37:45,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:45,480 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 305 transitions. [2021-11-25 19:37:45,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-25 19:37:45,480 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 305 transitions. [2021-11-25 19:37:45,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 19:37:45,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:45,481 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:45,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:37:45,482 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:45,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:45,482 INFO L85 PathProgramCache]: Analyzing trace with hash 990098525, now seen corresponding path program 1 times [2021-11-25 19:37:45,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:45,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68731291] [2021-11-25 19:37:45,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:45,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:37:45,650 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:45,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68731291] [2021-11-25 19:37:45,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68731291] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:45,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:45,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:37:45,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465188930] [2021-11-25 19:37:45,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:45,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:37:45,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:45,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:37:45,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:37:45,653 INFO L87 Difference]: Start difference. First operand 191 states and 305 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-25 19:37:47,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:47,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:47,936 INFO L93 Difference]: Finished difference Result 380 states and 608 transitions. [2021-11-25 19:37:47,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:37:47,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-25 19:37:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:47,937 INFO L225 Difference]: With dead ends: 380 [2021-11-25 19:37:47,938 INFO L226 Difference]: Without dead ends: 201 [2021-11-25 19:37:47,938 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 [2021-11-25 19:37:47,939 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 11 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:47,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 334 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:37:47,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-25 19:37:47,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 191. [2021-11-25 19:37:47,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.6) internal successors, (304), 190 states have internal predecessors, (304), 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) [2021-11-25 19:37:47,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 304 transitions. [2021-11-25 19:37:47,946 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 304 transitions. Word has length 77 [2021-11-25 19:37:47,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:47,946 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 304 transitions. [2021-11-25 19:37:47,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-25 19:37:47,947 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 304 transitions. [2021-11-25 19:37:47,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 19:37:47,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:47,948 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:47,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:37:47,948 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:47,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:47,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1189542317, now seen corresponding path program 1 times [2021-11-25 19:37:47,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:47,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34458080] [2021-11-25 19:37:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:47,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:37:48,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:48,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34458080] [2021-11-25 19:37:48,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34458080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:48,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:48,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:37:48,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665853798] [2021-11-25 19:37:48,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:48,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:37:48,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:48,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:37:48,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:37:48,091 INFO L87 Difference]: Start difference. First operand 191 states and 304 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-11-25 19:37:50,102 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:50,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:50,375 INFO L93 Difference]: Finished difference Result 372 states and 597 transitions. [2021-11-25 19:37:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:37:50,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 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 78 [2021-11-25 19:37:50,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:50,377 INFO L225 Difference]: With dead ends: 372 [2021-11-25 19:37:50,378 INFO L226 Difference]: Without dead ends: 193 [2021-11-25 19:37:50,378 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 [2021-11-25 19:37:50,379 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 5 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:50,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 344 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:37:50,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-25 19:37:50,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2021-11-25 19:37:50,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5947368421052632) internal successors, (303), 190 states have internal predecessors, (303), 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) [2021-11-25 19:37:50,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 303 transitions. [2021-11-25 19:37:50,386 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 303 transitions. Word has length 78 [2021-11-25 19:37:50,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:50,387 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 303 transitions. [2021-11-25 19:37:50,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-11-25 19:37:50,387 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 303 transitions. [2021-11-25 19:37:50,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-25 19:37:50,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:50,388 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:50,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 19:37:50,388 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:50,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:50,389 INFO L85 PathProgramCache]: Analyzing trace with hash 30024030, now seen corresponding path program 1 times [2021-11-25 19:37:50,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:50,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23615583] [2021-11-25 19:37:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:50,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:37:50,563 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:50,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23615583] [2021-11-25 19:37:50,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23615583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:50,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:50,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:37:50,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308514269] [2021-11-25 19:37:50,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:50,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:37:50,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:50,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:37:50,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:37:50,566 INFO L87 Difference]: Start difference. First operand 191 states and 303 transitions. 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) [2021-11-25 19:37:52,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:52,894 INFO L93 Difference]: Finished difference Result 404 states and 643 transitions. [2021-11-25 19:37:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:37:52,895 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 79 [2021-11-25 19:37:52,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:52,897 INFO L225 Difference]: With dead ends: 404 [2021-11-25 19:37:52,897 INFO L226 Difference]: Without dead ends: 225 [2021-11-25 19:37:52,897 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 [2021-11-25 19:37:52,898 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 20 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:52,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 339 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:37:52,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-25 19:37:52,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 211. [2021-11-25 19:37:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.5952380952380953) internal successors, (335), 210 states have internal predecessors, (335), 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) [2021-11-25 19:37:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 335 transitions. [2021-11-25 19:37:52,907 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 335 transitions. Word has length 79 [2021-11-25 19:37:52,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:52,908 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 335 transitions. [2021-11-25 19:37:52,909 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) [2021-11-25 19:37:52,909 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 335 transitions. [2021-11-25 19:37:52,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-25 19:37:52,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:52,910 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:52,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 19:37:52,910 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:52,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:52,911 INFO L85 PathProgramCache]: Analyzing trace with hash -839765618, now seen corresponding path program 1 times [2021-11-25 19:37:52,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:52,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000918393] [2021-11-25 19:37:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:52,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 19:37:53,086 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:53,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000918393] [2021-11-25 19:37:53,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000918393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:53,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:53,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:37:53,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254472929] [2021-11-25 19:37:53,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:53,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:37:53,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:53,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:37:53,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:37:53,088 INFO L87 Difference]: Start difference. First operand 211 states and 335 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:37:55,099 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:55,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:55,555 INFO L93 Difference]: Finished difference Result 418 states and 668 transitions. [2021-11-25 19:37:55,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:37:55,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-25 19:37:55,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:55,557 INFO L225 Difference]: With dead ends: 418 [2021-11-25 19:37:55,557 INFO L226 Difference]: Without dead ends: 219 [2021-11-25 19:37:55,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:37:55,558 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 118 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:55,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 240 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:37:55,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-25 19:37:55,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2021-11-25 19:37:55,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.5806451612903225) internal successors, (343), 217 states have internal predecessors, (343), 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) [2021-11-25 19:37:55,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 343 transitions. [2021-11-25 19:37:55,568 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 343 transitions. Word has length 90 [2021-11-25 19:37:55,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:55,568 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 343 transitions. [2021-11-25 19:37:55,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:37:55,569 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 343 transitions. [2021-11-25 19:37:55,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-25 19:37:55,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:55,570 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:55,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 19:37:55,570 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:55,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:55,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1589006055, now seen corresponding path program 1 times [2021-11-25 19:37:55,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:55,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681928487] [2021-11-25 19:37:55,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:55,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:37:55,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:55,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681928487] [2021-11-25 19:37:55,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681928487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:55,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:55,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:37:55,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167736300] [2021-11-25 19:37:55,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:55,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:37:55,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:55,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:37:55,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:37:55,756 INFO L87 Difference]: Start difference. First operand 218 states and 343 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-11-25 19:37:57,767 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:37:58,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:58,174 INFO L93 Difference]: Finished difference Result 487 states and 756 transitions. [2021-11-25 19:37:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:37:58,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 91 [2021-11-25 19:37:58,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:58,177 INFO L225 Difference]: With dead ends: 487 [2021-11-25 19:37:58,177 INFO L226 Difference]: Without dead ends: 281 [2021-11-25 19:37:58,178 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 [2021-11-25 19:37:58,178 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 114 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 47 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:58,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 262 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 230 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:37:58,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-25 19:37:58,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 218. [2021-11-25 19:37:58,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.566820276497696) internal successors, (340), 217 states have internal predecessors, (340), 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) [2021-11-25 19:37:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 340 transitions. [2021-11-25 19:37:58,189 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 340 transitions. Word has length 91 [2021-11-25 19:37:58,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:58,189 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 340 transitions. [2021-11-25 19:37:58,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-11-25 19:37:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 340 transitions. [2021-11-25 19:37:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-25 19:37:58,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:58,191 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:58,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 19:37:58,191 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:58,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:58,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1870704557, now seen corresponding path program 1 times [2021-11-25 19:37:58,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:58,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205906715] [2021-11-25 19:37:58,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:58,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:37:58,371 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:58,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205906715] [2021-11-25 19:37:58,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205906715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:58,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:37:58,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:37:58,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541750333] [2021-11-25 19:37:58,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:58,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:37:58,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:58,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:37:58,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:37:58,374 INFO L87 Difference]: Start difference. First operand 218 states and 340 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-11-25 19:38:00,391 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:38:00,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:00,727 INFO L93 Difference]: Finished difference Result 438 states and 683 transitions. [2021-11-25 19:38:00,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:38:00,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 91 [2021-11-25 19:38:00,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:00,729 INFO L225 Difference]: With dead ends: 438 [2021-11-25 19:38:00,729 INFO L226 Difference]: Without dead ends: 232 [2021-11-25 19:38:00,730 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 [2021-11-25 19:38:00,731 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 24 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:00,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 341 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 155 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:38:00,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-25 19:38:00,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 218. [2021-11-25 19:38:00,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.5622119815668203) internal successors, (339), 217 states have internal predecessors, (339), 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) [2021-11-25 19:38:00,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 339 transitions. [2021-11-25 19:38:00,741 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 339 transitions. Word has length 91 [2021-11-25 19:38:00,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:00,741 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 339 transitions. [2021-11-25 19:38:00,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-11-25 19:38:00,741 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 339 transitions. [2021-11-25 19:38:00,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-25 19:38:00,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:00,743 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:38:00,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 19:38:00,743 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:00,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:00,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1798018707, now seen corresponding path program 1 times [2021-11-25 19:38:00,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:00,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190469668] [2021-11-25 19:38:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:00,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:38:00,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:00,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190469668] [2021-11-25 19:38:00,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190469668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:38:00,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:38:00,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:38:00,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528417324] [2021-11-25 19:38:00,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:38:00,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:38:00,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:00,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:38:00,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:38:00,971 INFO L87 Difference]: Start difference. First operand 218 states and 339 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-11-25 19:38:02,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:38:03,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:03,407 INFO L93 Difference]: Finished difference Result 487 states and 748 transitions. [2021-11-25 19:38:03,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:38:03,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 91 [2021-11-25 19:38:03,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:03,410 INFO L225 Difference]: With dead ends: 487 [2021-11-25 19:38:03,410 INFO L226 Difference]: Without dead ends: 281 [2021-11-25 19:38:03,411 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 [2021-11-25 19:38:03,411 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 108 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:03,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 263 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 229 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:38:03,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-25 19:38:03,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 218. [2021-11-25 19:38:03,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.5483870967741935) internal successors, (336), 217 states have internal predecessors, (336), 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) [2021-11-25 19:38:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 336 transitions. [2021-11-25 19:38:03,424 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 336 transitions. Word has length 91 [2021-11-25 19:38:03,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:03,425 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 336 transitions. [2021-11-25 19:38:03,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-11-25 19:38:03,425 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 336 transitions. [2021-11-25 19:38:03,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 19:38:03,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:03,427 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:38:03,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 19:38:03,427 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:03,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:03,428 INFO L85 PathProgramCache]: Analyzing trace with hash 24547087, now seen corresponding path program 1 times [2021-11-25 19:38:03,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:03,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415891185] [2021-11-25 19:38:03,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:03,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:38:03,597 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:03,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415891185] [2021-11-25 19:38:03,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415891185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:38:03,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:38:03,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:38:03,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069841216] [2021-11-25 19:38:03,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:38:03,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:38:03,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:03,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:38:03,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:38:03,600 INFO L87 Difference]: Start difference. First operand 218 states and 336 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2021-11-25 19:38:05,617 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:38:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:05,926 INFO L93 Difference]: Finished difference Result 436 states and 673 transitions. [2021-11-25 19:38:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:38:05,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 92 [2021-11-25 19:38:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:05,929 INFO L225 Difference]: With dead ends: 436 [2021-11-25 19:38:05,929 INFO L226 Difference]: Without dead ends: 230 [2021-11-25 19:38:05,929 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 [2021-11-25 19:38:05,930 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 22 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:05,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 345 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 151 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:38:05,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-25 19:38:05,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 218. [2021-11-25 19:38:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.543778801843318) internal successors, (335), 217 states have internal predecessors, (335), 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) [2021-11-25 19:38:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 335 transitions. [2021-11-25 19:38:05,940 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 335 transitions. Word has length 92 [2021-11-25 19:38:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:05,940 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 335 transitions. [2021-11-25 19:38:05,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2021-11-25 19:38:05,941 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 335 transitions. [2021-11-25 19:38:05,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 19:38:05,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:05,942 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:38:05,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 19:38:05,943 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:05,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:05,943 INFO L85 PathProgramCache]: Analyzing trace with hash 744700148, now seen corresponding path program 1 times [2021-11-25 19:38:05,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:05,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507981206] [2021-11-25 19:38:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:05,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:38:06,133 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:06,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507981206] [2021-11-25 19:38:06,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507981206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:38:06,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:38:06,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:38:06,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838833284] [2021-11-25 19:38:06,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:38:06,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:38:06,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:38:06,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:38:06,135 INFO L87 Difference]: Start difference. First operand 218 states and 335 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-25 19:38:08,145 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:38:08,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:08,589 INFO L93 Difference]: Finished difference Result 487 states and 740 transitions. [2021-11-25 19:38:08,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:38:08,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 93 [2021-11-25 19:38:08,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:08,592 INFO L225 Difference]: With dead ends: 487 [2021-11-25 19:38:08,592 INFO L226 Difference]: Without dead ends: 281 [2021-11-25 19:38:08,593 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 [2021-11-25 19:38:08,593 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 111 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:08,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 262 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 230 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:38:08,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-25 19:38:08,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 218. [2021-11-25 19:38:08,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.5299539170506913) internal successors, (332), 217 states have internal predecessors, (332), 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) [2021-11-25 19:38:08,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 332 transitions. [2021-11-25 19:38:08,605 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 332 transitions. Word has length 93 [2021-11-25 19:38:08,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:08,605 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 332 transitions. [2021-11-25 19:38:08,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-25 19:38:08,605 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 332 transitions. [2021-11-25 19:38:08,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-25 19:38:08,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:08,607 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:38:08,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 19:38:08,607 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:08,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:08,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1337371312, now seen corresponding path program 1 times [2021-11-25 19:38:08,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:08,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178063908] [2021-11-25 19:38:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:08,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:38:08,761 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:08,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178063908] [2021-11-25 19:38:08,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178063908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:38:08,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:38:08,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:38:08,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609917349] [2021-11-25 19:38:08,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:38:08,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:38:08,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:08,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:38:08,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:38:08,765 INFO L87 Difference]: Start difference. First operand 218 states and 332 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-11-25 19:38:10,775 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:38:11,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:11,148 INFO L93 Difference]: Finished difference Result 479 states and 725 transitions. [2021-11-25 19:38:11,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:38:11,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 94 [2021-11-25 19:38:11,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:11,151 INFO L225 Difference]: With dead ends: 479 [2021-11-25 19:38:11,151 INFO L226 Difference]: Without dead ends: 273 [2021-11-25 19:38:11,152 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 [2021-11-25 19:38:11,153 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 105 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:11,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 270 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 222 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:38:11,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-25 19:38:11,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 218. [2021-11-25 19:38:11,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.5161290322580645) internal successors, (329), 217 states have internal predecessors, (329), 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) [2021-11-25 19:38:11,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 329 transitions. [2021-11-25 19:38:11,164 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 329 transitions. Word has length 94 [2021-11-25 19:38:11,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:11,165 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 329 transitions. [2021-11-25 19:38:11,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-11-25 19:38:11,165 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 329 transitions. [2021-11-25 19:38:11,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-25 19:38:11,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:11,166 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, 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] [2021-11-25 19:38:11,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 19:38:11,167 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:11,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:11,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1320237235, now seen corresponding path program 1 times [2021-11-25 19:38:11,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:11,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216503011] [2021-11-25 19:38:11,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:11,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:38:11,392 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:11,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216503011] [2021-11-25 19:38:11,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216503011] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:38:11,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815648362] [2021-11-25 19:38:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:11,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:11,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:38:11,397 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:38:11,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:38:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:12,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:38:12,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:38:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:38:12,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:38:12,775 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-25 19:38:12,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815648362] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 19:38:12,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:38:12,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 5 [2021-11-25 19:38:12,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240146231] [2021-11-25 19:38:12,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:38:12,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:38:12,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:12,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:38:12,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:38:12,777 INFO L87 Difference]: Start difference. First operand 218 states and 329 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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) [2021-11-25 19:38:14,802 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:38:14,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:14,932 INFO L93 Difference]: Finished difference Result 423 states and 645 transitions. [2021-11-25 19:38:14,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:38:14,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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 97 [2021-11-25 19:38:14,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:14,935 INFO L225 Difference]: With dead ends: 423 [2021-11-25 19:38:14,935 INFO L226 Difference]: Without dead ends: 421 [2021-11-25 19:38:14,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:38:14,936 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 107 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:14,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 280 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 19:38:14,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-11-25 19:38:14,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 418. [2021-11-25 19:38:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.5323741007194245) internal successors, (639), 417 states have internal predecessors, (639), 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) [2021-11-25 19:38:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 639 transitions. [2021-11-25 19:38:14,960 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 639 transitions. Word has length 97 [2021-11-25 19:38:14,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:14,961 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 639 transitions. [2021-11-25 19:38:14,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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) [2021-11-25 19:38:14,961 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 639 transitions. [2021-11-25 19:38:14,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-25 19:38:14,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:14,963 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, 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] [2021-11-25 19:38:15,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:38:15,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:15,177 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:15,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:15,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1683200190, now seen corresponding path program 1 times [2021-11-25 19:38:15,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:15,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58906343] [2021-11-25 19:38:15,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:15,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:38:15,469 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:15,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58906343] [2021-11-25 19:38:15,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58906343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:38:15,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576055112] [2021-11-25 19:38:15,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:15,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:15,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:38:15,471 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:38:15,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1065a45a-683f-4344-9c05-bd1cb39a40d9/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:38:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:16,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:38:16,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:38:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-25 19:38:16,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:38:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 19:38:17,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576055112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:38:17,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [138945676] [2021-11-25 19:38:17,175 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2021-11-25 19:38:17,176 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:38:17,181 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:38:17,186 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:38:17,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:38:19,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:19,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:31,948 INFO L190 IndexEqualityManager]: detected not equals via solver