./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:52:16,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:52:16,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:52:16,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:52:16,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:52:16,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:52:16,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:52:16,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:52:16,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:52:16,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:52:16,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:52:16,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:52:16,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:52:16,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:52:16,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:52:16,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:52:16,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:52:16,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:52:16,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:52:16,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:52:16,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:52:16,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:52:16,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:52:16,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:52:16,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:52:16,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:52:16,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:52:16,276 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:52:16,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:52:16,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:52:16,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:52:16,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:52:16,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:52:16,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:52:16,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:52:16,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:52:16,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:52:16,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:52:16,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:52:16,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:52:16,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:52:16,286 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:52:16,311 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:52:16,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:52:16,312 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:52:16,312 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:52:16,313 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:52:16,313 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:52:16,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:52:16,314 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:52:16,314 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:52:16,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:52:16,315 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:52:16,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:52:16,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:52:16,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:52:16,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:52:16,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:52:16,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:52:16,317 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:52:16,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:52:16,317 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:52:16,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:52:16,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:52:16,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:52:16,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:52:16,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:52:16,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:52:16,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:52:16,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:52:16,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:52:16,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:52:16,320 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:52:16,320 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:52:16,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:52:16,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:52:16,321 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc [2021-11-20 05:52:16,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:52:16,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:52:16,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:52:16,623 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:52:16,624 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:52:16,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-20 05:52:16,710 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/data/c4f32477e/264bbe7f9cff4358a480584579deeff8/FLAG6a89c3e7b [2021-11-20 05:52:17,314 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:52:17,315 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-20 05:52:17,350 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/data/c4f32477e/264bbe7f9cff4358a480584579deeff8/FLAG6a89c3e7b [2021-11-20 05:52:17,512 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/data/c4f32477e/264bbe7f9cff4358a480584579deeff8 [2021-11-20 05:52:17,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:52:17,519 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:52:17,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:52:17,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:52:17,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:52:17,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:52:17" (1/1) ... [2021-11-20 05:52:17,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53650f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:17, skipping insertion in model container [2021-11-20 05:52:17,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:52:17" (1/1) ... [2021-11-20 05:52:17,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:52:17,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:52:18,076 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_6368563e-f997-4489-a1da-4127a4fd582c/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-20 05:52:18,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:52:18,101 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:52:18,272 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-20 05:52:18,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:52:18,296 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:52:18,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:18 WrapperNode [2021-11-20 05:52:18,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:52:18,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:52:18,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:52:18,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:52:18,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:18" (1/1) ... [2021-11-20 05:52:18,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:18" (1/1) ... [2021-11-20 05:52:18,414 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 792 [2021-11-20 05:52:18,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:52:18,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:52:18,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:52:18,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:52:18,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:18" (1/1) ... [2021-11-20 05:52:18,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:18" (1/1) ... [2021-11-20 05:52:18,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:18" (1/1) ... [2021-11-20 05:52:18,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:18" (1/1) ... [2021-11-20 05:52:18,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:18" (1/1) ... [2021-11-20 05:52:18,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:18" (1/1) ... [2021-11-20 05:52:18,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:18" (1/1) ... [2021-11-20 05:52:18,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:52:18,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:52:18,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:52:18,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:52:18,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:18" (1/1) ... [2021-11-20 05:52:18,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:52:18,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:52:18,599 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:52:18,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:52:18,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:52:18,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 05:52:18,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:52:18,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:52:18,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 05:52:18,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:52:18,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:52:18,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:52:18,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:52:18,854 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:52:18,855 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:52:18,890 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 05:52:20,599 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-20 05:52:20,600 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-20 05:52:20,601 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:52:20,615 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:52:20,616 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 05:52:20,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:52:20 BoogieIcfgContainer [2021-11-20 05:52:20,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:52:20,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:52:20,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:52:20,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:52:20,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:52:17" (1/3) ... [2021-11-20 05:52:20,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9de1662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:52:20, skipping insertion in model container [2021-11-20 05:52:20,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:18" (2/3) ... [2021-11-20 05:52:20,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9de1662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:52:20, skipping insertion in model container [2021-11-20 05:52:20,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:52:20" (3/3) ... [2021-11-20 05:52:20,629 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.07.i.cil-1.c [2021-11-20 05:52:20,638 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:52:20,638 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:52:20,715 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:52:20,726 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 05:52:20,726 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:52:20,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:20,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 05:52:20,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:20,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:20,776 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:20,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:20,782 INFO L85 PathProgramCache]: Analyzing trace with hash -442385418, now seen corresponding path program 1 times [2021-11-20 05:52:20,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:20,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942514898] [2021-11-20 05:52:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:20,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:21,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:21,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942514898] [2021-11-20 05:52:21,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942514898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:21,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:21,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:21,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734880843] [2021-11-20 05:52:21,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:21,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:21,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:21,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:21,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:21,392 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 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) [2021-11-20 05:52:22,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:22,522 INFO L93 Difference]: Finished difference Result 325 states and 550 transitions. [2021-11-20 05:52:22,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:22,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 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 [2021-11-20 05:52:22,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:22,538 INFO L225 Difference]: With dead ends: 325 [2021-11-20 05:52:22,538 INFO L226 Difference]: Without dead ends: 165 [2021-11-20 05:52:22,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:52:22,546 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 36 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:22,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 585 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 05:52:22,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-20 05:52:22,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2021-11-20 05:52:22,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5578231292517006) internal successors, (229), 147 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 229 transitions. [2021-11-20 05:52:22,595 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 229 transitions. Word has length 37 [2021-11-20 05:52:22,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:22,595 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 229 transitions. [2021-11-20 05:52:22,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 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) [2021-11-20 05:52:22,596 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 229 transitions. [2021-11-20 05:52:22,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 05:52:22,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:22,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:22,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:52:22,599 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:22,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:22,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1588864032, now seen corresponding path program 1 times [2021-11-20 05:52:22,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:22,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846601136] [2021-11-20 05:52:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:22,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:22,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:22,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846601136] [2021-11-20 05:52:22,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846601136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:22,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:22,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:22,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33905307] [2021-11-20 05:52:22,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:22,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:22,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:22,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:22,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:22,748 INFO L87 Difference]: Start difference. First operand 148 states and 229 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 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) [2021-11-20 05:52:23,890 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:52:24,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:24,281 INFO L93 Difference]: Finished difference Result 292 states and 446 transitions. [2021-11-20 05:52:24,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:24,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 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 50 [2021-11-20 05:52:24,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:24,284 INFO L225 Difference]: With dead ends: 292 [2021-11-20 05:52:24,284 INFO L226 Difference]: Without dead ends: 165 [2021-11-20 05:52:24,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:52:24,287 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 24 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:24,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 471 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 05:52:24,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-20 05:52:24,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2021-11-20 05:52:24,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5510204081632653) internal successors, (228), 147 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:24,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 228 transitions. [2021-11-20 05:52:24,301 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 228 transitions. Word has length 50 [2021-11-20 05:52:24,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:24,302 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 228 transitions. [2021-11-20 05:52:24,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 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) [2021-11-20 05:52:24,302 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 228 transitions. [2021-11-20 05:52:24,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 05:52:24,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:24,308 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:24,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:52:24,309 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:24,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:24,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1079860431, now seen corresponding path program 1 times [2021-11-20 05:52:24,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:24,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832969856] [2021-11-20 05:52:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:24,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:24,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:24,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832969856] [2021-11-20 05:52:24,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832969856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:24,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:24,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:24,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543870431] [2021-11-20 05:52:24,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:24,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:24,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:24,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:24,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:24,514 INFO L87 Difference]: Start difference. First operand 148 states and 228 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2021-11-20 05:52:26,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:52:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:26,696 INFO L93 Difference]: Finished difference Result 291 states and 444 transitions. [2021-11-20 05:52:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:26,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 51 [2021-11-20 05:52:26,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:26,700 INFO L225 Difference]: With dead ends: 291 [2021-11-20 05:52:26,700 INFO L226 Difference]: Without dead ends: 164 [2021-11-20 05:52:26,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:52:26,702 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 28 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:26,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 473 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 05:52:26,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-20 05:52:26,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 148. [2021-11-20 05:52:26,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5442176870748299) internal successors, (227), 147 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) [2021-11-20 05:52:26,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 227 transitions. [2021-11-20 05:52:26,715 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 227 transitions. Word has length 51 [2021-11-20 05:52:26,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:26,716 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 227 transitions. [2021-11-20 05:52:26,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2021-11-20 05:52:26,716 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 227 transitions. [2021-11-20 05:52:26,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 05:52:26,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:26,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:26,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 05:52:26,720 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:26,720 INFO L85 PathProgramCache]: Analyzing trace with hash -214281275, now seen corresponding path program 1 times [2021-11-20 05:52:26,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:26,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198360269] [2021-11-20 05:52:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:26,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:26,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:26,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198360269] [2021-11-20 05:52:26,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198360269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:26,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:26,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:26,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057704813] [2021-11-20 05:52:26,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:26,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:26,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:26,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:26,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:26,807 INFO L87 Difference]: Start difference. First operand 148 states and 227 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2021-11-20 05:52:28,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:52:29,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:29,450 INFO L93 Difference]: Finished difference Result 291 states and 443 transitions. [2021-11-20 05:52:29,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:29,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 51 [2021-11-20 05:52:29,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:29,453 INFO L225 Difference]: With dead ends: 291 [2021-11-20 05:52:29,453 INFO L226 Difference]: Without dead ends: 164 [2021-11-20 05:52:29,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:52:29,455 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 26 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:29,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 473 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 05:52:29,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-20 05:52:29,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 148. [2021-11-20 05:52:29,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5374149659863945) internal successors, (226), 147 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 226 transitions. [2021-11-20 05:52:29,468 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 226 transitions. Word has length 51 [2021-11-20 05:52:29,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:29,469 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 226 transitions. [2021-11-20 05:52:29,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2021-11-20 05:52:29,470 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 226 transitions. [2021-11-20 05:52:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 05:52:29,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:29,473 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:29,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 05:52:29,474 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:29,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:29,475 INFO L85 PathProgramCache]: Analyzing trace with hash -603466340, now seen corresponding path program 1 times [2021-11-20 05:52:29,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:29,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928131615] [2021-11-20 05:52:29,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:29,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:29,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:29,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928131615] [2021-11-20 05:52:29,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928131615] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:29,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:29,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:29,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079859934] [2021-11-20 05:52:29,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:29,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:29,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:29,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:29,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:29,582 INFO L87 Difference]: Start difference. First operand 148 states and 226 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2021-11-20 05:52:31,593 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:52:32,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:32,017 INFO L93 Difference]: Finished difference Result 290 states and 441 transitions. [2021-11-20 05:52:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:32,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 51 [2021-11-20 05:52:32,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:32,020 INFO L225 Difference]: With dead ends: 290 [2021-11-20 05:52:32,020 INFO L226 Difference]: Without dead ends: 163 [2021-11-20 05:52:32,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:52:32,022 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 19 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:32,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 475 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:52:32,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-20 05:52:32,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 148. [2021-11-20 05:52:32,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.530612244897959) internal successors, (225), 147 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:32,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 225 transitions. [2021-11-20 05:52:32,034 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 225 transitions. Word has length 51 [2021-11-20 05:52:32,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:32,034 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 225 transitions. [2021-11-20 05:52:32,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2021-11-20 05:52:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 225 transitions. [2021-11-20 05:52:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 05:52:32,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:32,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:32,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 05:52:32,039 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:32,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1143611812, now seen corresponding path program 1 times [2021-11-20 05:52:32,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:32,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025926015] [2021-11-20 05:52:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:32,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:32,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:32,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025926015] [2021-11-20 05:52:32,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025926015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:32,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:32,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:32,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692405873] [2021-11-20 05:52:32,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:32,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:32,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:32,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:32,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:32,136 INFO L87 Difference]: Start difference. First operand 148 states and 225 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2021-11-20 05:52:34,147 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:52:34,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:34,535 INFO L93 Difference]: Finished difference Result 288 states and 438 transitions. [2021-11-20 05:52:34,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:34,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 51 [2021-11-20 05:52:34,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:34,538 INFO L225 Difference]: With dead ends: 288 [2021-11-20 05:52:34,538 INFO L226 Difference]: Without dead ends: 161 [2021-11-20 05:52:34,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:52:34,540 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 19 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:34,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 479 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:52:34,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-20 05:52:34,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 148. [2021-11-20 05:52:34,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5238095238095237) internal successors, (224), 147 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:34,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 224 transitions. [2021-11-20 05:52:34,549 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 224 transitions. Word has length 51 [2021-11-20 05:52:34,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:34,550 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 224 transitions. [2021-11-20 05:52:34,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2021-11-20 05:52:34,551 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 224 transitions. [2021-11-20 05:52:34,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 05:52:34,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:34,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:34,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 05:52:34,554 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:34,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:34,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1443637303, now seen corresponding path program 1 times [2021-11-20 05:52:34,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:34,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656390098] [2021-11-20 05:52:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:34,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:34,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:34,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656390098] [2021-11-20 05:52:34,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656390098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:34,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:34,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:34,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701942829] [2021-11-20 05:52:34,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:34,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:34,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:34,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:34,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:34,656 INFO L87 Difference]: Start difference. First operand 148 states and 224 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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) [2021-11-20 05:52:36,666 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:52:37,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:37,072 INFO L93 Difference]: Finished difference Result 288 states and 437 transitions. [2021-11-20 05:52:37,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:37,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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 52 [2021-11-20 05:52:37,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:37,075 INFO L225 Difference]: With dead ends: 288 [2021-11-20 05:52:37,075 INFO L226 Difference]: Without dead ends: 161 [2021-11-20 05:52:37,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:52:37,077 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 22 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:37,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 479 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:52:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-20 05:52:37,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 148. [2021-11-20 05:52:37,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5170068027210883) internal successors, (223), 147 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:37,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 223 transitions. [2021-11-20 05:52:37,085 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 223 transitions. Word has length 52 [2021-11-20 05:52:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:37,086 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 223 transitions. [2021-11-20 05:52:37,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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) [2021-11-20 05:52:37,087 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 223 transitions. [2021-11-20 05:52:37,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 05:52:37,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:37,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:37,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 05:52:37,089 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:37,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:37,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1217419126, now seen corresponding path program 1 times [2021-11-20 05:52:37,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:37,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458341328] [2021-11-20 05:52:37,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:37,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:37,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:37,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458341328] [2021-11-20 05:52:37,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458341328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:37,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:37,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:37,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918624777] [2021-11-20 05:52:37,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:37,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:37,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:37,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:37,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:37,193 INFO L87 Difference]: Start difference. First operand 148 states and 223 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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) [2021-11-20 05:52:39,204 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:52:39,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:39,578 INFO L93 Difference]: Finished difference Result 288 states and 436 transitions. [2021-11-20 05:52:39,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:39,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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 53 [2021-11-20 05:52:39,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:39,580 INFO L225 Difference]: With dead ends: 288 [2021-11-20 05:52:39,580 INFO L226 Difference]: Without dead ends: 161 [2021-11-20 05:52:39,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:52:39,582 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 20 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:39,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 479 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:52:39,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-20 05:52:39,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 148. [2021-11-20 05:52:39,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.510204081632653) internal successors, (222), 147 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 222 transitions. [2021-11-20 05:52:39,590 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 222 transitions. Word has length 53 [2021-11-20 05:52:39,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:39,591 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 222 transitions. [2021-11-20 05:52:39,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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) [2021-11-20 05:52:39,592 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 222 transitions. [2021-11-20 05:52:39,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 05:52:39,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:39,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:39,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 05:52:39,594 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:39,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1181926446, now seen corresponding path program 1 times [2021-11-20 05:52:39,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:39,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637044488] [2021-11-20 05:52:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:39,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:39,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:39,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637044488] [2021-11-20 05:52:39,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637044488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:39,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:39,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:39,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245164431] [2021-11-20 05:52:39,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:39,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:39,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:39,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:39,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:39,681 INFO L87 Difference]: Start difference. First operand 148 states and 222 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:40,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:40,910 INFO L93 Difference]: Finished difference Result 278 states and 422 transitions. [2021-11-20 05:52:40,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:40,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-20 05:52:40,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:40,912 INFO L225 Difference]: With dead ends: 278 [2021-11-20 05:52:40,913 INFO L226 Difference]: Without dead ends: 151 [2021-11-20 05:52:40,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:52:40,914 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 11 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:40,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 493 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 05:52:40,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-20 05:52:40,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2021-11-20 05:52:40,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5034013605442176) internal successors, (221), 147 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 221 transitions. [2021-11-20 05:52:40,922 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 221 transitions. Word has length 54 [2021-11-20 05:52:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:40,923 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 221 transitions. [2021-11-20 05:52:40,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:40,923 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 221 transitions. [2021-11-20 05:52:40,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 05:52:40,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:40,925 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:40,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 05:52:40,925 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:40,926 INFO L85 PathProgramCache]: Analyzing trace with hash 242366870, now seen corresponding path program 1 times [2021-11-20 05:52:40,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:40,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639160078] [2021-11-20 05:52:40,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:40,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:41,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:41,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639160078] [2021-11-20 05:52:41,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639160078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:41,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:41,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:41,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009963069] [2021-11-20 05:52:41,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:41,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:41,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:41,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:41,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:41,014 INFO L87 Difference]: Start difference. First operand 148 states and 221 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:43,025 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:52:43,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:43,399 INFO L93 Difference]: Finished difference Result 318 states and 483 transitions. [2021-11-20 05:52:43,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:43,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-20 05:52:43,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:43,402 INFO L225 Difference]: With dead ends: 318 [2021-11-20 05:52:43,402 INFO L226 Difference]: Without dead ends: 191 [2021-11-20 05:52:43,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:52:43,404 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 34 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:43,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 491 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:52:43,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-20 05:52:43,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 170. [2021-11-20 05:52:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.532544378698225) internal successors, (259), 169 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 259 transitions. [2021-11-20 05:52:43,413 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 259 transitions. Word has length 54 [2021-11-20 05:52:43,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:43,414 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 259 transitions. [2021-11-20 05:52:43,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:43,415 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 259 transitions. [2021-11-20 05:52:43,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 05:52:43,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:43,416 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:43,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 05:52:43,416 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:43,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:43,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2113194624, now seen corresponding path program 1 times [2021-11-20 05:52:43,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:43,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109851818] [2021-11-20 05:52:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:43,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:43,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:43,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109851818] [2021-11-20 05:52:43,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109851818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:43,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:43,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:43,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051708783] [2021-11-20 05:52:43,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:43,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:43,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:43,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:43,503 INFO L87 Difference]: Start difference. First operand 170 states and 259 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) [2021-11-20 05:52:44,709 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:52:45,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:45,091 INFO L93 Difference]: Finished difference Result 340 states and 520 transitions. [2021-11-20 05:52:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:45,095 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 67 [2021-11-20 05:52:45,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:45,097 INFO L225 Difference]: With dead ends: 340 [2021-11-20 05:52:45,097 INFO L226 Difference]: Without dead ends: 191 [2021-11-20 05:52:45,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:52:45,098 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 39 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:45,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 491 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 05:52:45,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-20 05:52:45,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 170. [2021-11-20 05:52:45,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.5266272189349113) internal successors, (258), 169 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:45,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 258 transitions. [2021-11-20 05:52:45,107 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 258 transitions. Word has length 67 [2021-11-20 05:52:45,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:45,107 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 258 transitions. [2021-11-20 05:52:45,107 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) [2021-11-20 05:52:45,107 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 258 transitions. [2021-11-20 05:52:45,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 05:52:45,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:45,108 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:45,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 05:52:45,113 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:45,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:45,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2005481263, now seen corresponding path program 1 times [2021-11-20 05:52:45,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:45,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243376261] [2021-11-20 05:52:45,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:45,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:45,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:45,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243376261] [2021-11-20 05:52:45,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243376261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:45,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:45,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:45,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345459565] [2021-11-20 05:52:45,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:45,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:45,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:45,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:45,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:45,220 INFO L87 Difference]: Start difference. First operand 170 states and 258 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) [2021-11-20 05:52:46,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:46,204 INFO L93 Difference]: Finished difference Result 339 states and 517 transitions. [2021-11-20 05:52:46,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:46,207 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 68 [2021-11-20 05:52:46,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:46,211 INFO L225 Difference]: With dead ends: 339 [2021-11-20 05:52:46,211 INFO L226 Difference]: Without dead ends: 190 [2021-11-20 05:52:46,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:52:46,213 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 43 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:46,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 493 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 05:52:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-20 05:52:46,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 170. [2021-11-20 05:52:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.5207100591715976) internal successors, (257), 169 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 257 transitions. [2021-11-20 05:52:46,228 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 257 transitions. Word has length 68 [2021-11-20 05:52:46,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:46,228 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 257 transitions. [2021-11-20 05:52:46,228 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) [2021-11-20 05:52:46,229 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 257 transitions. [2021-11-20 05:52:46,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 05:52:46,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:46,230 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:46,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 05:52:46,231 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:46,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:46,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1139902107, now seen corresponding path program 1 times [2021-11-20 05:52:46,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:46,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934195211] [2021-11-20 05:52:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:46,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:46,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:46,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934195211] [2021-11-20 05:52:46,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934195211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:46,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:46,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:46,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85583279] [2021-11-20 05:52:46,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:46,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:46,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:46,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:46,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:46,337 INFO L87 Difference]: Start difference. First operand 170 states and 257 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) [2021-11-20 05:52:48,351 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:52:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:48,737 INFO L93 Difference]: Finished difference Result 339 states and 515 transitions. [2021-11-20 05:52:48,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:48,737 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 68 [2021-11-20 05:52:48,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:48,739 INFO L225 Difference]: With dead ends: 339 [2021-11-20 05:52:48,739 INFO L226 Difference]: Without dead ends: 190 [2021-11-20 05:52:48,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:52:48,741 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 41 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:48,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 493 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:52:48,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-20 05:52:48,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 170. [2021-11-20 05:52:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.514792899408284) internal successors, (256), 169 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 256 transitions. [2021-11-20 05:52:48,750 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 256 transitions. Word has length 68 [2021-11-20 05:52:48,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:48,750 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 256 transitions. [2021-11-20 05:52:48,750 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) [2021-11-20 05:52:48,750 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 256 transitions. [2021-11-20 05:52:48,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 05:52:48,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:48,751 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:48,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 05:52:48,752 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:48,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:48,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1529087172, now seen corresponding path program 1 times [2021-11-20 05:52:48,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:48,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81109908] [2021-11-20 05:52:48,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:48,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:48,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:48,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81109908] [2021-11-20 05:52:48,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81109908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:48,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:48,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:48,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916950085] [2021-11-20 05:52:48,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:48,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:48,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:48,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:48,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:48,839 INFO L87 Difference]: Start difference. First operand 170 states and 256 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) [2021-11-20 05:52:50,851 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:52:51,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:51,238 INFO L93 Difference]: Finished difference Result 338 states and 512 transitions. [2021-11-20 05:52:51,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:51,238 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 68 [2021-11-20 05:52:51,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:51,240 INFO L225 Difference]: With dead ends: 338 [2021-11-20 05:52:51,240 INFO L226 Difference]: Without dead ends: 189 [2021-11-20 05:52:51,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:52:51,242 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 34 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:51,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 495 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 162 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:52:51,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-20 05:52:51,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 170. [2021-11-20 05:52:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.5088757396449703) internal successors, (255), 169 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 255 transitions. [2021-11-20 05:52:51,253 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 255 transitions. Word has length 68 [2021-11-20 05:52:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:51,253 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 255 transitions. [2021-11-20 05:52:51,253 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) [2021-11-20 05:52:51,254 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 255 transitions. [2021-11-20 05:52:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 05:52:51,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:51,255 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:51,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 05:52:51,255 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:51,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:51,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2069232644, now seen corresponding path program 1 times [2021-11-20 05:52:51,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:51,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387304565] [2021-11-20 05:52:51,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:51,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:51,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:51,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387304565] [2021-11-20 05:52:51,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387304565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:51,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:51,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:51,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274160657] [2021-11-20 05:52:51,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:51,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:51,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:51,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:51,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:51,336 INFO L87 Difference]: Start difference. First operand 170 states and 255 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) [2021-11-20 05:52:52,605 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:52:52,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:52,940 INFO L93 Difference]: Finished difference Result 336 states and 508 transitions. [2021-11-20 05:52:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:52,941 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 68 [2021-11-20 05:52:52,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:52,943 INFO L225 Difference]: With dead ends: 336 [2021-11-20 05:52:52,943 INFO L226 Difference]: Without dead ends: 187 [2021-11-20 05:52:52,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:52:52,945 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 34 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:52,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 499 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 05:52:52,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-20 05:52:52,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 170. [2021-11-20 05:52:52,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.5029585798816567) internal successors, (254), 169 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 254 transitions. [2021-11-20 05:52:52,960 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 254 transitions. Word has length 68 [2021-11-20 05:52:52,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:52,960 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 254 transitions. [2021-11-20 05:52:52,961 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) [2021-11-20 05:52:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 254 transitions. [2021-11-20 05:52:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 05:52:52,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:52,962 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:52,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 05:52:52,963 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:52,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:52,963 INFO L85 PathProgramCache]: Analyzing trace with hash -73112023, now seen corresponding path program 1 times [2021-11-20 05:52:52,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:52,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226417467] [2021-11-20 05:52:52,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:52,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:53,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:53,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226417467] [2021-11-20 05:52:53,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226417467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:53,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:53,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:53,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142069333] [2021-11-20 05:52:53,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:53,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:53,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:53,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:53,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:53,092 INFO L87 Difference]: Start difference. First operand 170 states and 254 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) [2021-11-20 05:52:55,102 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:52:55,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:55,471 INFO L93 Difference]: Finished difference Result 336 states and 506 transitions. [2021-11-20 05:52:55,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:55,472 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 69 [2021-11-20 05:52:55,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:55,474 INFO L225 Difference]: With dead ends: 336 [2021-11-20 05:52:55,474 INFO L226 Difference]: Without dead ends: 187 [2021-11-20 05:52:55,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:52:55,475 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 37 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:55,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 499 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:52:55,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-20 05:52:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 170. [2021-11-20 05:52:55,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.4970414201183433) internal successors, (253), 169 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:55,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 253 transitions. [2021-11-20 05:52:55,483 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 253 transitions. Word has length 69 [2021-11-20 05:52:55,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:55,484 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 253 transitions. [2021-11-20 05:52:55,484 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) [2021-11-20 05:52:55,484 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 253 transitions. [2021-11-20 05:52:55,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 05:52:55,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:55,486 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:55,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 05:52:55,486 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:55,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:55,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1680808406, now seen corresponding path program 1 times [2021-11-20 05:52:55,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:55,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872028881] [2021-11-20 05:52:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:55,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:55,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:55,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872028881] [2021-11-20 05:52:55,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872028881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:55,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:55,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:55,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189074287] [2021-11-20 05:52:55,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:55,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:55,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:55,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:55,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:55,561 INFO L87 Difference]: Start difference. First operand 170 states and 253 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) [2021-11-20 05:52:57,481 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:52:57,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:57,784 INFO L93 Difference]: Finished difference Result 336 states and 504 transitions. [2021-11-20 05:52:57,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:57,785 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 70 [2021-11-20 05:52:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:57,786 INFO L225 Difference]: With dead ends: 336 [2021-11-20 05:52:57,787 INFO L226 Difference]: Without dead ends: 187 [2021-11-20 05:52:57,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:52:57,788 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 35 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:57,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 499 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 05:52:57,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-20 05:52:57,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 170. [2021-11-20 05:52:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.4911242603550297) internal successors, (252), 169 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:57,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 252 transitions. [2021-11-20 05:52:57,797 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 252 transitions. Word has length 70 [2021-11-20 05:52:57,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:57,797 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 252 transitions. [2021-11-20 05:52:57,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:57,798 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 252 transitions. [2021-11-20 05:52:57,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 05:52:57,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:57,799 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:57,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 05:52:57,800 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:57,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:57,801 INFO L85 PathProgramCache]: Analyzing trace with hash -298239346, now seen corresponding path program 1 times [2021-11-20 05:52:57,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:57,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686691738] [2021-11-20 05:52:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:57,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:52:57,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:57,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686691738] [2021-11-20 05:52:57,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686691738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:57,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:57,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:57,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170644675] [2021-11-20 05:52:57,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:57,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:57,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:57,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:57,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:57,875 INFO L87 Difference]: Start difference. First operand 170 states and 252 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:59,305 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:52:59,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:59,657 INFO L93 Difference]: Finished difference Result 326 states and 489 transitions. [2021-11-20 05:52:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:52:59,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-20 05:52:59,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:59,660 INFO L225 Difference]: With dead ends: 326 [2021-11-20 05:52:59,660 INFO L226 Difference]: Without dead ends: 177 [2021-11-20 05:52:59,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:52:59,661 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 26 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:59,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 513 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 05:52:59,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-20 05:52:59,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2021-11-20 05:52:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.485207100591716) internal successors, (251), 169 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:59,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 251 transitions. [2021-11-20 05:52:59,670 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 251 transitions. Word has length 71 [2021-11-20 05:52:59,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:59,671 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 251 transitions. [2021-11-20 05:52:59,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:52:59,671 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 251 transitions. [2021-11-20 05:52:59,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 05:52:59,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:59,673 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:59,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 05:52:59,673 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:59,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:59,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1040793707, now seen corresponding path program 1 times [2021-11-20 05:52:59,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:52:59,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446748117] [2021-11-20 05:52:59,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:52:59,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:52:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:52:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:52:59,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:52:59,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446748117] [2021-11-20 05:52:59,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446748117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:52:59,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:52:59,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:52:59,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082724174] [2021-11-20 05:52:59,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:52:59,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:52:59,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:52:59,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:52:59,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:52:59,796 INFO L87 Difference]: Start difference. First operand 170 states and 251 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) [2021-11-20 05:53:01,809 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:02,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:02,304 INFO L93 Difference]: Finished difference Result 424 states and 638 transitions. [2021-11-20 05:53:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:02,304 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 76 [2021-11-20 05:53:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:02,307 INFO L225 Difference]: With dead ends: 424 [2021-11-20 05:53:02,307 INFO L226 Difference]: Without dead ends: 275 [2021-11-20 05:53:02,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:02,309 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 102 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:02,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 471 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 272 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 05:53:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-20 05:53:02,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 200. [2021-11-20 05:53:02,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.5226130653266332) internal successors, (303), 199 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) [2021-11-20 05:53:02,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 303 transitions. [2021-11-20 05:53:02,320 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 303 transitions. Word has length 76 [2021-11-20 05:53:02,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:02,320 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 303 transitions. [2021-11-20 05:53:02,321 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) [2021-11-20 05:53:02,321 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 303 transitions. [2021-11-20 05:53:02,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 05:53:02,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:02,322 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:02,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 05:53:02,323 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:02,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:02,324 INFO L85 PathProgramCache]: Analyzing trace with hash 968407149, now seen corresponding path program 1 times [2021-11-20 05:53:02,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:02,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208671963] [2021-11-20 05:53:02,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:02,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:02,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:02,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208671963] [2021-11-20 05:53:02,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208671963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:02,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:02,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:02,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303207817] [2021-11-20 05:53:02,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:02,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:02,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:02,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:02,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:02,411 INFO L87 Difference]: Start difference. First operand 200 states and 303 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) [2021-11-20 05:53:04,421 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:04,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:04,893 INFO L93 Difference]: Finished difference Result 429 states and 658 transitions. [2021-11-20 05:53:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:04,894 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 76 [2021-11-20 05:53:04,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:04,896 INFO L225 Difference]: With dead ends: 429 [2021-11-20 05:53:04,896 INFO L226 Difference]: Without dead ends: 250 [2021-11-20 05:53:04,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:04,898 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 42 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:04,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 603 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 185 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 05:53:04,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-20 05:53:04,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 224. [2021-11-20 05:53:04,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.547085201793722) internal successors, (345), 223 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:04,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 345 transitions. [2021-11-20 05:53:04,913 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 345 transitions. Word has length 76 [2021-11-20 05:53:04,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:04,913 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 345 transitions. [2021-11-20 05:53:04,914 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) [2021-11-20 05:53:04,914 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 345 transitions. [2021-11-20 05:53:04,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 05:53:04,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:04,916 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:04,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 05:53:04,916 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:04,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:04,917 INFO L85 PathProgramCache]: Analyzing trace with hash 293504549, now seen corresponding path program 1 times [2021-11-20 05:53:04,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:04,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814453600] [2021-11-20 05:53:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:04,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:05,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:05,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814453600] [2021-11-20 05:53:05,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814453600] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:05,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:05,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:05,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534628493] [2021-11-20 05:53:05,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:05,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:05,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:05,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:05,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:05,028 INFO L87 Difference]: Start difference. First operand 224 states and 345 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) [2021-11-20 05:53:06,806 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:07,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:07,272 INFO L93 Difference]: Finished difference Result 494 states and 760 transitions. [2021-11-20 05:53:07,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:07,273 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 77 [2021-11-20 05:53:07,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:07,275 INFO L225 Difference]: With dead ends: 494 [2021-11-20 05:53:07,276 INFO L226 Difference]: Without dead ends: 291 [2021-11-20 05:53:07,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:07,277 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 91 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:07,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 461 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 05:53:07,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-20 05:53:07,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 225. [2021-11-20 05:53:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.5446428571428572) internal successors, (346), 224 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 346 transitions. [2021-11-20 05:53:07,289 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 346 transitions. Word has length 77 [2021-11-20 05:53:07,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:07,289 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 346 transitions. [2021-11-20 05:53:07,290 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) [2021-11-20 05:53:07,290 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 346 transitions. [2021-11-20 05:53:07,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-20 05:53:07,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:07,292 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:07,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 05:53:07,292 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:07,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:07,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2009733770, now seen corresponding path program 1 times [2021-11-20 05:53:07,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:07,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740993789] [2021-11-20 05:53:07,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:07,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:07,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:07,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740993789] [2021-11-20 05:53:07,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740993789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:07,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:07,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:07,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515788672] [2021-11-20 05:53:07,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:07,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:07,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:07,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:07,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:07,385 INFO L87 Difference]: Start difference. First operand 225 states and 346 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:09,396 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:09,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:09,911 INFO L93 Difference]: Finished difference Result 495 states and 760 transitions. [2021-11-20 05:53:09,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:09,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 82 [2021-11-20 05:53:09,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:09,915 INFO L225 Difference]: With dead ends: 495 [2021-11-20 05:53:09,915 INFO L226 Difference]: Without dead ends: 291 [2021-11-20 05:53:09,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:09,917 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 80 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:09,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 461 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 250 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 05:53:09,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-20 05:53:09,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 235. [2021-11-20 05:53:09,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.5598290598290598) internal successors, (365), 234 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:09,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 365 transitions. [2021-11-20 05:53:09,929 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 365 transitions. Word has length 82 [2021-11-20 05:53:09,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:09,930 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 365 transitions. [2021-11-20 05:53:09,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:09,930 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 365 transitions. [2021-11-20 05:53:09,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-20 05:53:09,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:09,936 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:09,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 05:53:09,937 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:09,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:09,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2129799745, now seen corresponding path program 1 times [2021-11-20 05:53:09,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:09,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181345305] [2021-11-20 05:53:09,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:09,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:10,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:10,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181345305] [2021-11-20 05:53:10,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181345305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:10,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:10,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:10,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871501944] [2021-11-20 05:53:10,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:10,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:10,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:10,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:10,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:10,040 INFO L87 Difference]: Start difference. First operand 235 states and 365 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:12,053 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:12,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:12,501 INFO L93 Difference]: Finished difference Result 499 states and 771 transitions. [2021-11-20 05:53:12,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:12,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 83 [2021-11-20 05:53:12,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:12,503 INFO L225 Difference]: With dead ends: 499 [2021-11-20 05:53:12,503 INFO L226 Difference]: Without dead ends: 285 [2021-11-20 05:53:12,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:12,505 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 73 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:12,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 467 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 244 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:53:12,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-20 05:53:12,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 236. [2021-11-20 05:53:12,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.5574468085106383) internal successors, (366), 235 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 366 transitions. [2021-11-20 05:53:12,516 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 366 transitions. Word has length 83 [2021-11-20 05:53:12,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:12,516 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 366 transitions. [2021-11-20 05:53:12,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:12,517 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 366 transitions. [2021-11-20 05:53:12,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 05:53:12,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:12,519 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:12,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-20 05:53:12,519 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:12,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:12,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1140832821, now seen corresponding path program 1 times [2021-11-20 05:53:12,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:12,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327933146] [2021-11-20 05:53:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:12,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:12,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:12,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327933146] [2021-11-20 05:53:12,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327933146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:12,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:12,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:12,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582422830] [2021-11-20 05:53:12,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:12,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:12,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:12,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:12,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:12,608 INFO L87 Difference]: Start difference. First operand 236 states and 366 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:14,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:15,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:15,032 INFO L93 Difference]: Finished difference Result 500 states and 771 transitions. [2021-11-20 05:53:15,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:15,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-20 05:53:15,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:15,035 INFO L225 Difference]: With dead ends: 500 [2021-11-20 05:53:15,035 INFO L226 Difference]: Without dead ends: 285 [2021-11-20 05:53:15,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:15,037 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 96 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:15,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 469 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 246 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:53:15,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-20 05:53:15,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 236. [2021-11-20 05:53:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.553191489361702) internal successors, (365), 235 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:15,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 365 transitions. [2021-11-20 05:53:15,048 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 365 transitions. Word has length 89 [2021-11-20 05:53:15,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:15,048 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 365 transitions. [2021-11-20 05:53:15,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:15,049 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 365 transitions. [2021-11-20 05:53:15,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 05:53:15,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:15,051 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:15,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 05:53:15,051 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:15,052 INFO L85 PathProgramCache]: Analyzing trace with hash 787439881, now seen corresponding path program 1 times [2021-11-20 05:53:15,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:15,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229386592] [2021-11-20 05:53:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:15,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:15,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:15,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229386592] [2021-11-20 05:53:15,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229386592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:15,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:15,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:15,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044987287] [2021-11-20 05:53:15,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:15,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:15,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:15,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:15,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:15,136 INFO L87 Difference]: Start difference. First operand 236 states and 365 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:17,146 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:17,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:17,477 INFO L93 Difference]: Finished difference Result 477 states and 739 transitions. [2021-11-20 05:53:17,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:17,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-20 05:53:17,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:17,488 INFO L225 Difference]: With dead ends: 477 [2021-11-20 05:53:17,488 INFO L226 Difference]: Without dead ends: 262 [2021-11-20 05:53:17,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:17,490 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 49 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:17,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 603 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 183 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:53:17,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-20 05:53:17,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 236. [2021-11-20 05:53:17,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.548936170212766) internal successors, (364), 235 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:17,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 364 transitions. [2021-11-20 05:53:17,500 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 364 transitions. Word has length 89 [2021-11-20 05:53:17,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:17,501 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 364 transitions. [2021-11-20 05:53:17,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:17,502 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 364 transitions. [2021-11-20 05:53:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 05:53:17,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:17,503 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:17,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 05:53:17,504 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:17,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:17,505 INFO L85 PathProgramCache]: Analyzing trace with hash 198883046, now seen corresponding path program 1 times [2021-11-20 05:53:17,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:17,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061255737] [2021-11-20 05:53:17,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:17,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:17,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:17,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061255737] [2021-11-20 05:53:17,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061255737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:17,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:17,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:17,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301308841] [2021-11-20 05:53:17,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:17,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:17,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:17,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:17,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:17,603 INFO L87 Difference]: Start difference. First operand 236 states and 364 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:19,616 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:20,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:20,004 INFO L93 Difference]: Finished difference Result 499 states and 766 transitions. [2021-11-20 05:53:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:20,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 [2021-11-20 05:53:20,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:20,006 INFO L225 Difference]: With dead ends: 499 [2021-11-20 05:53:20,006 INFO L226 Difference]: Without dead ends: 284 [2021-11-20 05:53:20,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:20,008 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 100 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:20,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 467 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 243 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:53:20,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-20 05:53:20,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 236. [2021-11-20 05:53:20,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.5446808510638297) internal successors, (363), 235 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:20,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 363 transitions. [2021-11-20 05:53:20,018 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 363 transitions. Word has length 90 [2021-11-20 05:53:20,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:20,019 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 363 transitions. [2021-11-20 05:53:20,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:20,020 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 363 transitions. [2021-11-20 05:53:20,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 05:53:20,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:20,022 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:20,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 05:53:20,022 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:20,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:20,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1064462202, now seen corresponding path program 1 times [2021-11-20 05:53:20,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:20,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276723438] [2021-11-20 05:53:20,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:20,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 05:53:20,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:20,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276723438] [2021-11-20 05:53:20,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276723438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:20,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:20,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:53:20,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785723910] [2021-11-20 05:53:20,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:20,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:53:20,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:20,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:53:20,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:20,132 INFO L87 Difference]: Start difference. First operand 236 states and 363 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:23,075 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:23,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:23,567 INFO L93 Difference]: Finished difference Result 472 states and 731 transitions. [2021-11-20 05:53:23,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:53:23,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 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 [2021-11-20 05:53:23,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:23,570 INFO L225 Difference]: With dead ends: 472 [2021-11-20 05:53:23,571 INFO L226 Difference]: Without dead ends: 257 [2021-11-20 05:53:23,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:53:23,572 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 148 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:23,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 358 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 311 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2021-11-20 05:53:23,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-20 05:53:23,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2021-11-20 05:53:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5254901960784313) internal successors, (389), 255 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 389 transitions. [2021-11-20 05:53:23,584 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 389 transitions. Word has length 90 [2021-11-20 05:53:23,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:23,584 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 389 transitions. [2021-11-20 05:53:23,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:23,585 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 389 transitions. [2021-11-20 05:53:23,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 05:53:23,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:23,586 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:23,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-20 05:53:23,587 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:23,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:23,588 INFO L85 PathProgramCache]: Analyzing trace with hash 675277137, now seen corresponding path program 1 times [2021-11-20 05:53:23,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:23,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772168009] [2021-11-20 05:53:23,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:23,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:23,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:23,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772168009] [2021-11-20 05:53:23,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772168009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:23,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:23,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:23,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300347441] [2021-11-20 05:53:23,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:23,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:23,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:23,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:23,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:23,683 INFO L87 Difference]: Start difference. First operand 256 states and 389 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:25,696 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:26,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:26,172 INFO L93 Difference]: Finished difference Result 538 states and 814 transitions. [2021-11-20 05:53:26,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:26,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 [2021-11-20 05:53:26,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:26,175 INFO L225 Difference]: With dead ends: 538 [2021-11-20 05:53:26,176 INFO L226 Difference]: Without dead ends: 303 [2021-11-20 05:53:26,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:26,177 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 92 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:26,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 471 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 239 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 05:53:26,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-20 05:53:26,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 256. [2021-11-20 05:53:26,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5215686274509803) internal successors, (388), 255 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:26,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 388 transitions. [2021-11-20 05:53:26,191 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 388 transitions. Word has length 90 [2021-11-20 05:53:26,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:26,192 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 388 transitions. [2021-11-20 05:53:26,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:26,192 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 388 transitions. [2021-11-20 05:53:26,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 05:53:26,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:26,194 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:26,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-20 05:53:26,195 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:26,195 INFO L85 PathProgramCache]: Analyzing trace with hash 135131665, now seen corresponding path program 1 times [2021-11-20 05:53:26,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:26,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190922002] [2021-11-20 05:53:26,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:26,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:26,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:26,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190922002] [2021-11-20 05:53:26,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190922002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:26,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:26,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:26,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961354750] [2021-11-20 05:53:26,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:26,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:26,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:26,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:26,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:26,284 INFO L87 Difference]: Start difference. First operand 256 states and 388 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:28,299 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:28,767 INFO L93 Difference]: Finished difference Result 536 states and 810 transitions. [2021-11-20 05:53:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:28,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 [2021-11-20 05:53:28,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:28,770 INFO L225 Difference]: With dead ends: 536 [2021-11-20 05:53:28,771 INFO L226 Difference]: Without dead ends: 301 [2021-11-20 05:53:28,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:28,772 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 92 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:28,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 475 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 05:53:28,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-20 05:53:28,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 256. [2021-11-20 05:53:28,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5176470588235293) internal successors, (387), 255 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:28,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 387 transitions. [2021-11-20 05:53:28,789 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 387 transitions. Word has length 90 [2021-11-20 05:53:28,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:28,789 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 387 transitions. [2021-11-20 05:53:28,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:28,790 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 387 transitions. [2021-11-20 05:53:28,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 05:53:28,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:28,792 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:28,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-20 05:53:28,792 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:28,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:28,793 INFO L85 PathProgramCache]: Analyzing trace with hash 322188755, now seen corresponding path program 1 times [2021-11-20 05:53:28,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:28,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073456471] [2021-11-20 05:53:28,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:28,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:28,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:28,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073456471] [2021-11-20 05:53:28,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073456471] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:28,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:28,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:28,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639782304] [2021-11-20 05:53:28,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:28,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:28,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:28,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:28,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:28,873 INFO L87 Difference]: Start difference. First operand 256 states and 387 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:30,883 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:31,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:31,237 INFO L93 Difference]: Finished difference Result 515 states and 780 transitions. [2021-11-20 05:53:31,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:31,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 [2021-11-20 05:53:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:31,240 INFO L225 Difference]: With dead ends: 515 [2021-11-20 05:53:31,240 INFO L226 Difference]: Without dead ends: 280 [2021-11-20 05:53:31,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:31,242 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 45 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:31,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 593 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 174 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:53:31,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-20 05:53:31,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 256. [2021-11-20 05:53:31,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5137254901960784) internal successors, (386), 255 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:31,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 386 transitions. [2021-11-20 05:53:31,277 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 386 transitions. Word has length 90 [2021-11-20 05:53:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:31,278 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 386 transitions. [2021-11-20 05:53:31,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:31,278 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 386 transitions. [2021-11-20 05:53:31,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 05:53:31,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:31,280 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:31,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-20 05:53:31,281 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:31,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:31,282 INFO L85 PathProgramCache]: Analyzing trace with hash -217956717, now seen corresponding path program 1 times [2021-11-20 05:53:31,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:31,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217708050] [2021-11-20 05:53:31,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:31,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:31,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:31,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217708050] [2021-11-20 05:53:31,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217708050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:31,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:31,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:31,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398618181] [2021-11-20 05:53:31,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:31,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:31,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:31,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:31,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:31,374 INFO L87 Difference]: Start difference. First operand 256 states and 386 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:33,389 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:33,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:33,758 INFO L93 Difference]: Finished difference Result 513 states and 776 transitions. [2021-11-20 05:53:33,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:33,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 [2021-11-20 05:53:33,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:33,760 INFO L225 Difference]: With dead ends: 513 [2021-11-20 05:53:33,760 INFO L226 Difference]: Without dead ends: 278 [2021-11-20 05:53:33,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:33,761 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 45 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:33,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 597 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:53:33,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-20 05:53:33,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 256. [2021-11-20 05:53:33,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5098039215686274) internal successors, (385), 255 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:33,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 385 transitions. [2021-11-20 05:53:33,781 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 385 transitions. Word has length 90 [2021-11-20 05:53:33,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:33,782 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 385 transitions. [2021-11-20 05:53:33,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:33,783 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 385 transitions. [2021-11-20 05:53:33,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-20 05:53:33,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:33,784 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:33,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-20 05:53:33,785 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:33,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:33,786 INFO L85 PathProgramCache]: Analyzing trace with hash -326145177, now seen corresponding path program 1 times [2021-11-20 05:53:33,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:33,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556144044] [2021-11-20 05:53:33,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:33,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:33,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:33,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556144044] [2021-11-20 05:53:33,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556144044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:33,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:33,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:33,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561237211] [2021-11-20 05:53:33,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:33,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:33,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:33,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:33,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:33,866 INFO L87 Difference]: Start difference. First operand 256 states and 385 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:35,876 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:36,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:36,253 INFO L93 Difference]: Finished difference Result 536 states and 804 transitions. [2021-11-20 05:53:36,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:36,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 [2021-11-20 05:53:36,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:36,256 INFO L225 Difference]: With dead ends: 536 [2021-11-20 05:53:36,256 INFO L226 Difference]: Without dead ends: 301 [2021-11-20 05:53:36,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:36,258 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 96 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:36,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 499 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:53:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-20 05:53:36,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 256. [2021-11-20 05:53:36,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5058823529411764) internal successors, (384), 255 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:36,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 384 transitions. [2021-11-20 05:53:36,274 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 384 transitions. Word has length 91 [2021-11-20 05:53:36,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:36,276 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 384 transitions. [2021-11-20 05:53:36,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:36,276 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 384 transitions. [2021-11-20 05:53:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-20 05:53:36,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:36,278 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:36,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-20 05:53:36,279 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:36,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:36,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1613016869, now seen corresponding path program 1 times [2021-11-20 05:53:36,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:36,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051401352] [2021-11-20 05:53:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:36,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:36,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:36,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051401352] [2021-11-20 05:53:36,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051401352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:36,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:36,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:36,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615741492] [2021-11-20 05:53:36,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:36,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:36,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:36,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:36,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:36,393 INFO L87 Difference]: Start difference. First operand 256 states and 384 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:38,401 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:38,714 INFO L93 Difference]: Finished difference Result 513 states and 772 transitions. [2021-11-20 05:53:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:38,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 [2021-11-20 05:53:38,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:38,717 INFO L225 Difference]: With dead ends: 513 [2021-11-20 05:53:38,717 INFO L226 Difference]: Without dead ends: 278 [2021-11-20 05:53:38,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:38,719 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 49 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:38,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 595 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:53:38,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-20 05:53:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 256. [2021-11-20 05:53:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5019607843137255) internal successors, (383), 255 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 383 transitions. [2021-11-20 05:53:38,732 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 383 transitions. Word has length 91 [2021-11-20 05:53:38,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:38,732 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 383 transitions. [2021-11-20 05:53:38,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:38,733 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 383 transitions. [2021-11-20 05:53:38,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-20 05:53:38,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:38,735 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:38,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-20 05:53:38,735 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:38,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:38,736 INFO L85 PathProgramCache]: Analyzing trace with hash -255983763, now seen corresponding path program 1 times [2021-11-20 05:53:38,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:38,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573626024] [2021-11-20 05:53:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:38,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:38,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:38,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573626024] [2021-11-20 05:53:38,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573626024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:38,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:38,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:38,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806017263] [2021-11-20 05:53:38,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:38,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:38,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:38,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:38,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:38,816 INFO L87 Difference]: Start difference. First operand 256 states and 383 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:40,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:41,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:41,305 INFO L93 Difference]: Finished difference Result 536 states and 800 transitions. [2021-11-20 05:53:41,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:41,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 [2021-11-20 05:53:41,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:41,308 INFO L225 Difference]: With dead ends: 536 [2021-11-20 05:53:41,308 INFO L226 Difference]: Without dead ends: 301 [2021-11-20 05:53:41,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:41,310 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 94 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:41,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 499 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 05:53:41,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-20 05:53:41,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 256. [2021-11-20 05:53:41,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4980392156862745) internal successors, (382), 255 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:41,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 382 transitions. [2021-11-20 05:53:41,323 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 382 transitions. Word has length 92 [2021-11-20 05:53:41,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:41,324 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 382 transitions. [2021-11-20 05:53:41,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:41,324 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 382 transitions. [2021-11-20 05:53:41,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-20 05:53:41,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:41,326 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:41,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-20 05:53:41,327 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:41,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:41,327 INFO L85 PathProgramCache]: Analyzing trace with hash -271502481, now seen corresponding path program 1 times [2021-11-20 05:53:41,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:41,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419984220] [2021-11-20 05:53:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:41,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:41,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:41,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419984220] [2021-11-20 05:53:41,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419984220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:41,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:41,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:41,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862372793] [2021-11-20 05:53:41,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:41,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:41,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:41,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:41,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:41,412 INFO L87 Difference]: Start difference. First operand 256 states and 382 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:43,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:43,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:43,742 INFO L93 Difference]: Finished difference Result 513 states and 768 transitions. [2021-11-20 05:53:43,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:43,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 [2021-11-20 05:53:43,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:43,745 INFO L225 Difference]: With dead ends: 513 [2021-11-20 05:53:43,745 INFO L226 Difference]: Without dead ends: 278 [2021-11-20 05:53:43,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:43,747 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 47 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:43,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 593 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:53:43,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-20 05:53:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 256. [2021-11-20 05:53:43,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4941176470588236) internal successors, (381), 255 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 381 transitions. [2021-11-20 05:53:43,760 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 381 transitions. Word has length 92 [2021-11-20 05:53:43,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:43,760 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 381 transitions. [2021-11-20 05:53:43,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:43,761 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 381 transitions. [2021-11-20 05:53:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 05:53:43,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:43,763 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:43,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-20 05:53:43,763 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:43,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:43,764 INFO L85 PathProgramCache]: Analyzing trace with hash 636985474, now seen corresponding path program 1 times [2021-11-20 05:53:43,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:43,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080582025] [2021-11-20 05:53:43,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:43,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:43,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:43,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080582025] [2021-11-20 05:53:43,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080582025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:43,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:43,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:43,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851344121] [2021-11-20 05:53:43,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:43,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:43,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:43,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:43,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:43,843 INFO L87 Difference]: Start difference. First operand 256 states and 381 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:45,854 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:46,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:46,278 INFO L93 Difference]: Finished difference Result 536 states and 796 transitions. [2021-11-20 05:53:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:46,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-20 05:53:46,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:46,281 INFO L225 Difference]: With dead ends: 536 [2021-11-20 05:53:46,281 INFO L226 Difference]: Without dead ends: 301 [2021-11-20 05:53:46,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:46,283 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 92 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:46,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 499 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:53:46,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-20 05:53:46,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 256. [2021-11-20 05:53:46,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4901960784313726) internal successors, (380), 255 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 380 transitions. [2021-11-20 05:53:46,296 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 380 transitions. Word has length 93 [2021-11-20 05:53:46,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:46,296 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 380 transitions. [2021-11-20 05:53:46,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:46,297 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 380 transitions. [2021-11-20 05:53:46,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 05:53:46,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:46,299 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:46,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-20 05:53:46,299 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:46,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:46,300 INFO L85 PathProgramCache]: Analyzing trace with hash 155905216, now seen corresponding path program 1 times [2021-11-20 05:53:46,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:46,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748300464] [2021-11-20 05:53:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:46,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:46,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:46,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748300464] [2021-11-20 05:53:46,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748300464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:46,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:46,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:46,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619791588] [2021-11-20 05:53:46,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:46,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:46,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:46,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:46,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:46,375 INFO L87 Difference]: Start difference. First operand 256 states and 380 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:48,385 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:48,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:48,767 INFO L93 Difference]: Finished difference Result 513 states and 764 transitions. [2021-11-20 05:53:48,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:48,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-20 05:53:48,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:48,770 INFO L225 Difference]: With dead ends: 513 [2021-11-20 05:53:48,770 INFO L226 Difference]: Without dead ends: 278 [2021-11-20 05:53:48,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:48,772 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 45 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:48,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 591 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:53:48,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-20 05:53:48,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 256. [2021-11-20 05:53:48,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4862745098039216) internal successors, (379), 255 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 379 transitions. [2021-11-20 05:53:48,783 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 379 transitions. Word has length 93 [2021-11-20 05:53:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:48,783 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 379 transitions. [2021-11-20 05:53:48,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 379 transitions. [2021-11-20 05:53:48,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 05:53:48,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:48,786 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:48,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-20 05:53:48,786 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:48,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:48,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1267193448, now seen corresponding path program 1 times [2021-11-20 05:53:48,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:48,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016479482] [2021-11-20 05:53:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:48,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:48,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:48,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016479482] [2021-11-20 05:53:48,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016479482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:48,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:48,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:48,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400069748] [2021-11-20 05:53:48,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:48,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:48,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:48,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:48,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:48,891 INFO L87 Difference]: Start difference. First operand 256 states and 379 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:50,901 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:51,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:51,264 INFO L93 Difference]: Finished difference Result 526 states and 780 transitions. [2021-11-20 05:53:51,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:51,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 [2021-11-20 05:53:51,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:51,267 INFO L225 Difference]: With dead ends: 526 [2021-11-20 05:53:51,267 INFO L226 Difference]: Without dead ends: 291 [2021-11-20 05:53:51,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:51,269 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 83 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:51,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 487 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:53:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-20 05:53:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 256. [2021-11-20 05:53:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4823529411764707) internal successors, (378), 255 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 378 transitions. [2021-11-20 05:53:51,283 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 378 transitions. Word has length 94 [2021-11-20 05:53:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:51,283 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 378 transitions. [2021-11-20 05:53:51,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:51,284 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 378 transitions. [2021-11-20 05:53:51,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 05:53:51,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:51,286 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:51,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-20 05:53:51,286 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:51,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:51,287 INFO L85 PathProgramCache]: Analyzing trace with hash -761392662, now seen corresponding path program 1 times [2021-11-20 05:53:51,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:51,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154573496] [2021-11-20 05:53:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:51,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:51,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:51,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154573496] [2021-11-20 05:53:51,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154573496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:51,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:51,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:51,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527791766] [2021-11-20 05:53:51,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:51,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:51,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:51,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:51,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:51,369 INFO L87 Difference]: Start difference. First operand 256 states and 378 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:53,379 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:53,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:53,616 INFO L93 Difference]: Finished difference Result 503 states and 748 transitions. [2021-11-20 05:53:53,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:53,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 [2021-11-20 05:53:53,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:53,617 INFO L225 Difference]: With dead ends: 503 [2021-11-20 05:53:53,618 INFO L226 Difference]: Without dead ends: 268 [2021-11-20 05:53:53,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:53,619 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 36 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:53,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 577 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 05:53:53,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-20 05:53:53,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 256. [2021-11-20 05:53:53,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4784313725490197) internal successors, (377), 255 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:53,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 377 transitions. [2021-11-20 05:53:53,629 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 377 transitions. Word has length 94 [2021-11-20 05:53:53,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:53,629 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 377 transitions. [2021-11-20 05:53:53,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:53,630 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 377 transitions. [2021-11-20 05:53:53,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 05:53:53,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:53,631 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:53,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-20 05:53:53,631 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:53,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:53,632 INFO L85 PathProgramCache]: Analyzing trace with hash 920784942, now seen corresponding path program 1 times [2021-11-20 05:53:53,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:53,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327583798] [2021-11-20 05:53:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:53,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:53:53,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:53,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327583798] [2021-11-20 05:53:53,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327583798] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:53,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:53,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:53,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653571991] [2021-11-20 05:53:53,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:53,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:53,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:53,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:53,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:53,704 INFO L87 Difference]: Start difference. First operand 256 states and 377 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:55,177 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:55,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:55,496 INFO L93 Difference]: Finished difference Result 526 states and 776 transitions. [2021-11-20 05:53:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:55,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 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 98 [2021-11-20 05:53:55,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:55,498 INFO L225 Difference]: With dead ends: 526 [2021-11-20 05:53:55,498 INFO L226 Difference]: Without dead ends: 291 [2021-11-20 05:53:55,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:55,499 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 73 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:55,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 503 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 05:53:55,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-20 05:53:55,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 256. [2021-11-20 05:53:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4745098039215687) internal successors, (376), 255 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 376 transitions. [2021-11-20 05:53:55,509 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 376 transitions. Word has length 98 [2021-11-20 05:53:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:55,509 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 376 transitions. [2021-11-20 05:53:55,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:55,509 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 376 transitions. [2021-11-20 05:53:55,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 05:53:55,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:55,510 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:55,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-20 05:53:55,511 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:55,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:55,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1987396944, now seen corresponding path program 1 times [2021-11-20 05:53:55,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:55,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044332676] [2021-11-20 05:53:55,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:55,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 05:53:55,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:55,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044332676] [2021-11-20 05:53:55,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044332676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:55,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:55,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:53:55,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905854644] [2021-11-20 05:53:55,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:55,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:53:55,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:55,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:53:55,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:53:55,566 INFO L87 Difference]: Start difference. First operand 256 states and 376 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:55,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:55,609 INFO L93 Difference]: Finished difference Result 719 states and 1070 transitions. [2021-11-20 05:53:55,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:53:55,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 98 [2021-11-20 05:53:55,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:55,613 INFO L225 Difference]: With dead ends: 719 [2021-11-20 05:53:55,613 INFO L226 Difference]: Without dead ends: 484 [2021-11-20 05:53:55,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:53:55,614 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 142 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:55,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 426 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:53:55,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-20 05:53:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 484. [2021-11-20 05:53:55,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 1.4720496894409938) internal successors, (711), 483 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:55,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 711 transitions. [2021-11-20 05:53:55,632 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 711 transitions. Word has length 98 [2021-11-20 05:53:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:55,633 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 711 transitions. [2021-11-20 05:53:55,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:55,633 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 711 transitions. [2021-11-20 05:53:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 05:53:55,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:55,635 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:55,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-20 05:53:55,635 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:55,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:55,636 INFO L85 PathProgramCache]: Analyzing trace with hash -726479694, now seen corresponding path program 1 times [2021-11-20 05:53:55,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:55,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029837148] [2021-11-20 05:53:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:55,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 05:53:55,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:55,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029837148] [2021-11-20 05:53:55,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029837148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:55,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:55,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:53:55,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700286160] [2021-11-20 05:53:55,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:55,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:53:55,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:55,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:53:55,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:53:55,680 INFO L87 Difference]: Start difference. First operand 484 states and 711 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:55,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:55,723 INFO L93 Difference]: Finished difference Result 974 states and 1434 transitions. [2021-11-20 05:53:55,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:53:55,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 98 [2021-11-20 05:53:55,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:55,727 INFO L225 Difference]: With dead ends: 974 [2021-11-20 05:53:55,727 INFO L226 Difference]: Without dead ends: 511 [2021-11-20 05:53:55,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:53:55,729 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:55,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 410 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:53:55,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-11-20 05:53:55,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2021-11-20 05:53:55,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.4627450980392156) internal successors, (746), 510 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 746 transitions. [2021-11-20 05:53:55,750 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 746 transitions. Word has length 98 [2021-11-20 05:53:55,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:55,750 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 746 transitions. [2021-11-20 05:53:55,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:55,750 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 746 transitions. [2021-11-20 05:53:55,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 05:53:55,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:55,752 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:55,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-20 05:53:55,753 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:55,754 INFO L85 PathProgramCache]: Analyzing trace with hash -699414092, now seen corresponding path program 1 times [2021-11-20 05:53:55,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:55,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283772562] [2021-11-20 05:53:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:55,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-20 05:53:55,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:55,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283772562] [2021-11-20 05:53:55,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283772562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:55,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:55,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:53:55,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416485437] [2021-11-20 05:53:55,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:55,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:53:55,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:55,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:53:55,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:53:55,799 INFO L87 Difference]: Start difference. First operand 511 states and 746 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:55,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:55,837 INFO L93 Difference]: Finished difference Result 1003 states and 1470 transitions. [2021-11-20 05:53:55,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:53:55,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 98 [2021-11-20 05:53:55,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:55,841 INFO L225 Difference]: With dead ends: 1003 [2021-11-20 05:53:55,841 INFO L226 Difference]: Without dead ends: 513 [2021-11-20 05:53:55,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:53:55,843 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:55,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 389 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:53:55,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-11-20 05:53:55,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 513. [2021-11-20 05:53:55,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.4609375) internal successors, (748), 512 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:55,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 748 transitions. [2021-11-20 05:53:55,862 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 748 transitions. Word has length 98 [2021-11-20 05:53:55,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:55,862 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 748 transitions. [2021-11-20 05:53:55,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:55,862 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 748 transitions. [2021-11-20 05:53:55,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 05:53:55,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:55,864 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:55,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-20 05:53:55,864 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:55,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:55,865 INFO L85 PathProgramCache]: Analyzing trace with hash 468915674, now seen corresponding path program 1 times [2021-11-20 05:53:55,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:55,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591901901] [2021-11-20 05:53:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:55,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:53:55,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:55,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591901901] [2021-11-20 05:53:55,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591901901] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:55,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:55,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:53:55,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464436735] [2021-11-20 05:53:55,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:55,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:53:55,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:55,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:53:55,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:53:55,921 INFO L87 Difference]: Start difference. First operand 513 states and 748 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:55,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:55,979 INFO L93 Difference]: Finished difference Result 1238 states and 1820 transitions. [2021-11-20 05:53:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:53:55,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 100 [2021-11-20 05:53:55,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:55,985 INFO L225 Difference]: With dead ends: 1238 [2021-11-20 05:53:55,985 INFO L226 Difference]: Without dead ends: 748 [2021-11-20 05:53:55,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:53:55,987 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 165 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:55,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 372 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:53:55,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-11-20 05:53:56,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 746. [2021-11-20 05:53:56,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 1.4711409395973154) internal successors, (1096), 745 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:56,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1096 transitions. [2021-11-20 05:53:56,018 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1096 transitions. Word has length 100 [2021-11-20 05:53:56,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:56,019 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1096 transitions. [2021-11-20 05:53:56,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:56,020 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1096 transitions. [2021-11-20 05:53:56,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 05:53:56,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:56,022 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:56,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-20 05:53:56,022 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:56,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:56,023 INFO L85 PathProgramCache]: Analyzing trace with hash 34857145, now seen corresponding path program 1 times [2021-11-20 05:53:56,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:56,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606515204] [2021-11-20 05:53:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:56,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:53:56,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:56,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606515204] [2021-11-20 05:53:56,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606515204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:56,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:56,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:53:56,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85452346] [2021-11-20 05:53:56,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:56,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:53:56,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:56,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:53:56,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:53:56,091 INFO L87 Difference]: Start difference. First operand 746 states and 1096 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:56,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:56,157 INFO L93 Difference]: Finished difference Result 1704 states and 2514 transitions. [2021-11-20 05:53:56,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:53:56,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 106 [2021-11-20 05:53:56,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:56,163 INFO L225 Difference]: With dead ends: 1704 [2021-11-20 05:53:56,164 INFO L226 Difference]: Without dead ends: 981 [2021-11-20 05:53:56,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:53:56,167 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:56,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 567 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:53:56,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-11-20 05:53:56,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 979. [2021-11-20 05:53:56,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 1.4621676891615543) internal successors, (1430), 978 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:56,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1430 transitions. [2021-11-20 05:53:56,221 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1430 transitions. Word has length 106 [2021-11-20 05:53:56,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:56,222 INFO L470 AbstractCegarLoop]: Abstraction has 979 states and 1430 transitions. [2021-11-20 05:53:56,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:56,222 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1430 transitions. [2021-11-20 05:53:56,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-20 05:53:56,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:56,225 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:56,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-20 05:53:56,225 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:56,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:56,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1774249839, now seen corresponding path program 1 times [2021-11-20 05:53:56,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:56,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174313820] [2021-11-20 05:53:56,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:56,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:53:56,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:56,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174313820] [2021-11-20 05:53:56,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174313820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:56,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:56,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:53:56,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284205083] [2021-11-20 05:53:56,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:56,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:53:56,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:56,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:53:56,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:53:56,299 INFO L87 Difference]: Start difference. First operand 979 states and 1430 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:56,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:56,372 INFO L93 Difference]: Finished difference Result 2165 states and 3177 transitions. [2021-11-20 05:53:56,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:53:56,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 123 [2021-11-20 05:53:56,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:56,379 INFO L225 Difference]: With dead ends: 2165 [2021-11-20 05:53:56,380 INFO L226 Difference]: Without dead ends: 1209 [2021-11-20 05:53:56,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:53:56,382 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 143 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:56,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 567 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:53:56,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-11-20 05:53:56,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1209. [2021-11-20 05:53:56,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 1.4619205298013245) internal successors, (1766), 1208 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:56,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1766 transitions. [2021-11-20 05:53:56,425 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1766 transitions. Word has length 123 [2021-11-20 05:53:56,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:56,425 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 1766 transitions. [2021-11-20 05:53:56,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1766 transitions. [2021-11-20 05:53:56,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-20 05:53:56,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:56,431 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:56,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-20 05:53:56,432 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:56,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:56,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1271906027, now seen corresponding path program 1 times [2021-11-20 05:53:56,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:56,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752287294] [2021-11-20 05:53:56,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:56,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 05:53:56,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:56,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752287294] [2021-11-20 05:53:56,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752287294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:56,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:56,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:53:56,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623225941] [2021-11-20 05:53:56,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:56,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:53:56,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:56,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:53:56,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:53:56,523 INFO L87 Difference]: Start difference. First operand 1209 states and 1766 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:56,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:56,592 INFO L93 Difference]: Finished difference Result 1446 states and 2111 transitions. [2021-11-20 05:53:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:53:56,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-11-20 05:53:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:56,600 INFO L225 Difference]: With dead ends: 1446 [2021-11-20 05:53:56,601 INFO L226 Difference]: Without dead ends: 1444 [2021-11-20 05:53:56,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:53:56,602 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 165 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:56,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 371 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:53:56,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-11-20 05:53:56,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1442. [2021-11-20 05:53:56,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 1.4628730048577376) internal successors, (2108), 1441 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 2108 transitions. [2021-11-20 05:53:56,668 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 2108 transitions. Word has length 129 [2021-11-20 05:53:56,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:56,669 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 2108 transitions. [2021-11-20 05:53:56,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:56,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 2108 transitions. [2021-11-20 05:53:56,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-20 05:53:56,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:56,673 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:56,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-20 05:53:56,673 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:56,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:56,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1035961974, now seen corresponding path program 1 times [2021-11-20 05:53:56,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:56,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876039987] [2021-11-20 05:53:56,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:56,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-20 05:53:56,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:56,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876039987] [2021-11-20 05:53:56,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876039987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:56,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:56,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:53:56,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718835169] [2021-11-20 05:53:56,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:56,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:53:56,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:56,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:53:56,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:53:56,750 INFO L87 Difference]: Start difference. First operand 1442 states and 2108 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:56,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:56,826 INFO L93 Difference]: Finished difference Result 3091 states and 4534 transitions. [2021-11-20 05:53:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:53:56,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-11-20 05:53:56,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:56,836 INFO L225 Difference]: With dead ends: 3091 [2021-11-20 05:53:56,836 INFO L226 Difference]: Without dead ends: 1672 [2021-11-20 05:53:56,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:53:56,839 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 143 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:56,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 571 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:53:56,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-11-20 05:53:56,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1672. [2021-11-20 05:53:56,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 1.4631956912028725) internal successors, (2445), 1671 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2445 transitions. [2021-11-20 05:53:56,894 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2445 transitions. Word has length 166 [2021-11-20 05:53:56,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:56,895 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 2445 transitions. [2021-11-20 05:53:56,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:56,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2445 transitions. [2021-11-20 05:53:56,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-20 05:53:56,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:56,899 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:56,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-20 05:53:56,899 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:56,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:56,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1329857341, now seen corresponding path program 1 times [2021-11-20 05:53:56,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:56,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447882961] [2021-11-20 05:53:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:56,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 05:53:56,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:56,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447882961] [2021-11-20 05:53:56,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447882961] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:56,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:56,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:56,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123400076] [2021-11-20 05:53:56,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:56,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:56,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:56,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:56,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:56,987 INFO L87 Difference]: Start difference. First operand 1672 states and 2445 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:58,256 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:53:58,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:53:58,707 INFO L93 Difference]: Finished difference Result 3762 states and 5531 transitions. [2021-11-20 05:53:58,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:53:58,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 172 [2021-11-20 05:53:58,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:53:58,719 INFO L225 Difference]: With dead ends: 3762 [2021-11-20 05:53:58,719 INFO L226 Difference]: Without dead ends: 2113 [2021-11-20 05:53:58,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:53:58,722 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 55 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:53:58,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 617 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 05:53:58,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-11-20 05:53:58,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1868. [2021-11-20 05:53:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 1.4933047670058919) internal successors, (2788), 1867 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2788 transitions. [2021-11-20 05:53:58,792 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2788 transitions. Word has length 172 [2021-11-20 05:53:58,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:53:58,793 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 2788 transitions. [2021-11-20 05:53:58,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:53:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2788 transitions. [2021-11-20 05:53:58,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-20 05:53:58,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:53:58,797 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:53:58,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-20 05:53:58,798 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:53:58,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:53:58,799 INFO L85 PathProgramCache]: Analyzing trace with hash -166109961, now seen corresponding path program 1 times [2021-11-20 05:53:58,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:53:58,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927212112] [2021-11-20 05:53:58,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:53:58,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:53:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:53:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 05:53:58,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:53:58,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927212112] [2021-11-20 05:53:58,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927212112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:53:58,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:53:58,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:53:58,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087776874] [2021-11-20 05:53:58,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:53:58,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:53:58,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:53:58,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:53:58,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:53:58,893 INFO L87 Difference]: Start difference. First operand 1868 states and 2788 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:00,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:00,125 INFO L93 Difference]: Finished difference Result 3958 states and 5867 transitions. [2021-11-20 05:54:00,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:00,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 185 [2021-11-20 05:54:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:00,139 INFO L225 Difference]: With dead ends: 3958 [2021-11-20 05:54:00,139 INFO L226 Difference]: Without dead ends: 2113 [2021-11-20 05:54:00,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:00,143 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 66 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:00,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 617 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 05:54:00,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-11-20 05:54:00,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1868. [2021-11-20 05:54:00,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 1.4895554365291912) internal successors, (2781), 1867 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:00,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2781 transitions. [2021-11-20 05:54:00,213 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2781 transitions. Word has length 185 [2021-11-20 05:54:00,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:00,214 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 2781 transitions. [2021-11-20 05:54:00,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:00,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2781 transitions. [2021-11-20 05:54:00,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-20 05:54:00,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:00,219 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:00,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-11-20 05:54:00,219 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:00,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:00,220 INFO L85 PathProgramCache]: Analyzing trace with hash 587620765, now seen corresponding path program 1 times [2021-11-20 05:54:00,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:00,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062621727] [2021-11-20 05:54:00,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:00,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 05:54:00,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:00,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062621727] [2021-11-20 05:54:00,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062621727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:00,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:00,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:00,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091014352] [2021-11-20 05:54:00,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:00,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:00,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:00,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:00,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:00,320 INFO L87 Difference]: Start difference. First operand 1868 states and 2781 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:02,328 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:02,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:02,713 INFO L93 Difference]: Finished difference Result 3951 states and 5846 transitions. [2021-11-20 05:54:02,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:02,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 186 [2021-11-20 05:54:02,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:02,726 INFO L225 Difference]: With dead ends: 3951 [2021-11-20 05:54:02,726 INFO L226 Difference]: Without dead ends: 2106 [2021-11-20 05:54:02,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:02,730 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 63 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:02,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 615 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:54:02,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-11-20 05:54:02,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1868. [2021-11-20 05:54:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 1.4858061060524905) internal successors, (2774), 1867 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:02,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2774 transitions. [2021-11-20 05:54:02,795 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2774 transitions. Word has length 186 [2021-11-20 05:54:02,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:02,795 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 2774 transitions. [2021-11-20 05:54:02,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:02,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2774 transitions. [2021-11-20 05:54:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-20 05:54:02,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:02,800 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:02,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-11-20 05:54:02,800 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:02,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:02,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1125277917, now seen corresponding path program 1 times [2021-11-20 05:54:02,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:02,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300252752] [2021-11-20 05:54:02,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:02,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 05:54:02,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:02,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300252752] [2021-11-20 05:54:02,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300252752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:02,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:02,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:02,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387929693] [2021-11-20 05:54:02,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:02,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:02,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:02,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:02,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:02,912 INFO L87 Difference]: Start difference. First operand 1868 states and 2774 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:04,919 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:05,234 INFO L93 Difference]: Finished difference Result 3937 states and 5818 transitions. [2021-11-20 05:54:05,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:05,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 186 [2021-11-20 05:54:05,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:05,247 INFO L225 Difference]: With dead ends: 3937 [2021-11-20 05:54:05,247 INFO L226 Difference]: Without dead ends: 2092 [2021-11-20 05:54:05,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:05,250 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 63 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:05,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 613 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:54:05,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-11-20 05:54:05,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1868. [2021-11-20 05:54:05,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 1.48205677557579) internal successors, (2767), 1867 states have internal predecessors, (2767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:05,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2767 transitions. [2021-11-20 05:54:05,315 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2767 transitions. Word has length 186 [2021-11-20 05:54:05,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:05,316 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 2767 transitions. [2021-11-20 05:54:05,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:05,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2767 transitions. [2021-11-20 05:54:05,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-20 05:54:05,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:05,321 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:05,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-11-20 05:54:05,322 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:05,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:05,322 INFO L85 PathProgramCache]: Analyzing trace with hash 203508571, now seen corresponding path program 1 times [2021-11-20 05:54:05,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:05,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344380477] [2021-11-20 05:54:05,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:05,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 05:54:05,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:05,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344380477] [2021-11-20 05:54:05,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344380477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:05,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:05,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:05,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098671403] [2021-11-20 05:54:05,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:05,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:05,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:05,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:05,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:05,428 INFO L87 Difference]: Start difference. First operand 1868 states and 2767 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:06,606 INFO L93 Difference]: Finished difference Result 3937 states and 5804 transitions. [2021-11-20 05:54:06,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:06,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 187 [2021-11-20 05:54:06,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:06,625 INFO L225 Difference]: With dead ends: 3937 [2021-11-20 05:54:06,625 INFO L226 Difference]: Without dead ends: 2092 [2021-11-20 05:54:06,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:06,630 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 67 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:06,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 611 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 05:54:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-11-20 05:54:06,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1868. [2021-11-20 05:54:06,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 1.4783074450990894) internal successors, (2760), 1867 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2760 transitions. [2021-11-20 05:54:06,703 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2760 transitions. Word has length 187 [2021-11-20 05:54:06,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:06,704 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 2760 transitions. [2021-11-20 05:54:06,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:06,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2760 transitions. [2021-11-20 05:54:06,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-20 05:54:06,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:06,724 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:06,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-20 05:54:06,725 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:06,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:06,725 INFO L85 PathProgramCache]: Analyzing trace with hash 965067905, now seen corresponding path program 1 times [2021-11-20 05:54:06,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:06,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660847913] [2021-11-20 05:54:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:06,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 05:54:06,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:06,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660847913] [2021-11-20 05:54:06,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660847913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:06,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:06,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:06,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332543841] [2021-11-20 05:54:06,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:06,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:06,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:06,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:06,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:06,827 INFO L87 Difference]: Start difference. First operand 1868 states and 2760 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:07,935 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:08,260 INFO L93 Difference]: Finished difference Result 3937 states and 5790 transitions. [2021-11-20 05:54:08,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:08,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 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 188 [2021-11-20 05:54:08,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:08,266 INFO L225 Difference]: With dead ends: 3937 [2021-11-20 05:54:08,266 INFO L226 Difference]: Without dead ends: 2092 [2021-11-20 05:54:08,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:08,269 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 65 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:08,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 609 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 05:54:08,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-11-20 05:54:08,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1868. [2021-11-20 05:54:08,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 1.474558114622389) internal successors, (2753), 1867 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:08,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2753 transitions. [2021-11-20 05:54:08,352 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2753 transitions. Word has length 188 [2021-11-20 05:54:08,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:08,353 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 2753 transitions. [2021-11-20 05:54:08,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:08,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2753 transitions. [2021-11-20 05:54:08,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-20 05:54:08,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:08,357 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:08,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-11-20 05:54:08,358 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:08,358 INFO L85 PathProgramCache]: Analyzing trace with hash -31739680, now seen corresponding path program 1 times [2021-11-20 05:54:08,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:08,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518773271] [2021-11-20 05:54:08,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:08,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 05:54:08,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:08,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518773271] [2021-11-20 05:54:08,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518773271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:08,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:08,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:08,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329981426] [2021-11-20 05:54:08,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:08,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:08,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:08,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:08,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:08,440 INFO L87 Difference]: Start difference. First operand 1868 states and 2753 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:10,449 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:10,776 INFO L93 Difference]: Finished difference Result 3937 states and 5776 transitions. [2021-11-20 05:54:10,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:10,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 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 189 [2021-11-20 05:54:10,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:10,785 INFO L225 Difference]: With dead ends: 3937 [2021-11-20 05:54:10,785 INFO L226 Difference]: Without dead ends: 2092 [2021-11-20 05:54:10,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:10,788 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 63 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:10,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 607 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:54:10,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-11-20 05:54:10,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1868. [2021-11-20 05:54:10,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 1.4708087841456883) internal successors, (2746), 1867 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:10,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2746 transitions. [2021-11-20 05:54:10,876 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2746 transitions. Word has length 189 [2021-11-20 05:54:10,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:10,876 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 2746 transitions. [2021-11-20 05:54:10,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:10,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2746 transitions. [2021-11-20 05:54:10,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-20 05:54:10,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:10,882 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:10,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-11-20 05:54:10,882 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:10,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:10,883 INFO L85 PathProgramCache]: Analyzing trace with hash 296653094, now seen corresponding path program 1 times [2021-11-20 05:54:10,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:10,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592906411] [2021-11-20 05:54:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:10,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 05:54:10,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:10,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592906411] [2021-11-20 05:54:10,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592906411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:10,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:10,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:10,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33851922] [2021-11-20 05:54:10,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:10,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:10,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:10,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:10,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:10,974 INFO L87 Difference]: Start difference. First operand 1868 states and 2746 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:12,985 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:13,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:13,297 INFO L93 Difference]: Finished difference Result 3867 states and 5678 transitions. [2021-11-20 05:54:13,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:13,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 190 [2021-11-20 05:54:13,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:13,302 INFO L225 Difference]: With dead ends: 3867 [2021-11-20 05:54:13,303 INFO L226 Difference]: Without dead ends: 2022 [2021-11-20 05:54:13,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:13,306 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 54 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:13,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 593 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 194 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:54:13,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-11-20 05:54:13,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1868. [2021-11-20 05:54:13,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 1.4670594536689876) internal successors, (2739), 1867 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:13,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2739 transitions. [2021-11-20 05:54:13,383 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2739 transitions. Word has length 190 [2021-11-20 05:54:13,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:13,384 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 2739 transitions. [2021-11-20 05:54:13,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:13,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2739 transitions. [2021-11-20 05:54:13,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-20 05:54:13,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:13,390 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:13,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-11-20 05:54:13,390 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:13,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:13,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1768487092, now seen corresponding path program 1 times [2021-11-20 05:54:13,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:13,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953725100] [2021-11-20 05:54:13,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:13,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 05:54:13,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:13,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953725100] [2021-11-20 05:54:13,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953725100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:13,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:13,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:13,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184602886] [2021-11-20 05:54:13,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:13,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:13,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:13,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:13,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:13,494 INFO L87 Difference]: Start difference. First operand 1868 states and 2739 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:15,505 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:15,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:15,833 INFO L93 Difference]: Finished difference Result 3867 states and 5664 transitions. [2021-11-20 05:54:15,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:15,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 194 [2021-11-20 05:54:15,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:15,836 INFO L225 Difference]: With dead ends: 3867 [2021-11-20 05:54:15,836 INFO L226 Difference]: Without dead ends: 2022 [2021-11-20 05:54:15,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:15,839 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 46 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:15,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 591 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 194 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:54:15,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-11-20 05:54:15,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1868. [2021-11-20 05:54:15,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 1.4633101231922871) internal successors, (2732), 1867 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:15,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2732 transitions. [2021-11-20 05:54:15,888 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2732 transitions. Word has length 194 [2021-11-20 05:54:15,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:15,889 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 2732 transitions. [2021-11-20 05:54:15,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:15,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2732 transitions. [2021-11-20 05:54:15,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-20 05:54:15,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:15,896 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:15,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-11-20 05:54:15,897 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:15,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:15,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2046919520, now seen corresponding path program 1 times [2021-11-20 05:54:15,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:15,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325451582] [2021-11-20 05:54:15,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:15,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 05:54:15,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:15,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325451582] [2021-11-20 05:54:15,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325451582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:15,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:15,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:15,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941213950] [2021-11-20 05:54:15,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:15,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:15,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:15,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:15,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:15,985 INFO L87 Difference]: Start difference. First operand 1868 states and 2732 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:17,200 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:17,615 INFO L93 Difference]: Finished difference Result 3867 states and 5650 transitions. [2021-11-20 05:54:17,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:17,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 194 [2021-11-20 05:54:17,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:17,620 INFO L225 Difference]: With dead ends: 3867 [2021-11-20 05:54:17,620 INFO L226 Difference]: Without dead ends: 2022 [2021-11-20 05:54:17,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:17,623 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 43 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:17,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 589 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 05:54:17,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-11-20 05:54:17,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1868. [2021-11-20 05:54:17,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 1.4595607927155865) internal successors, (2725), 1867 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:17,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2725 transitions. [2021-11-20 05:54:17,673 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2725 transitions. Word has length 194 [2021-11-20 05:54:17,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:17,674 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 2725 transitions. [2021-11-20 05:54:17,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:17,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2725 transitions. [2021-11-20 05:54:17,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-20 05:54:17,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:17,678 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:17,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-11-20 05:54:17,679 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:17,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:17,680 INFO L85 PathProgramCache]: Analyzing trace with hash 246022214, now seen corresponding path program 1 times [2021-11-20 05:54:17,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:17,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224349423] [2021-11-20 05:54:17,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:17,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 05:54:17,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:17,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224349423] [2021-11-20 05:54:17,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224349423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:17,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:17,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:17,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136049795] [2021-11-20 05:54:17,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:17,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:17,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:17,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:17,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:17,777 INFO L87 Difference]: Start difference. First operand 1868 states and 2725 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:19,793 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:20,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:20,098 INFO L93 Difference]: Finished difference Result 3839 states and 5600 transitions. [2021-11-20 05:54:20,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:20,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 195 [2021-11-20 05:54:20,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:20,103 INFO L225 Difference]: With dead ends: 3839 [2021-11-20 05:54:20,103 INFO L226 Difference]: Without dead ends: 1994 [2021-11-20 05:54:20,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:20,106 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 39 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:20,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 581 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 186 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:54:20,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-11-20 05:54:20,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1868. [2021-11-20 05:54:20,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 1.455811462238886) internal successors, (2718), 1867 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2718 transitions. [2021-11-20 05:54:20,165 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2718 transitions. Word has length 195 [2021-11-20 05:54:20,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:20,166 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 2718 transitions. [2021-11-20 05:54:20,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:20,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2718 transitions. [2021-11-20 05:54:20,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-20 05:54:20,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:20,171 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:20,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-11-20 05:54:20,172 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:20,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1629193990, now seen corresponding path program 1 times [2021-11-20 05:54:20,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:20,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549308116] [2021-11-20 05:54:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:20,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 05:54:20,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:20,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549308116] [2021-11-20 05:54:20,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549308116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:20,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:20,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:20,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493397537] [2021-11-20 05:54:20,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:20,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:20,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:20,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:20,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:20,258 INFO L87 Difference]: Start difference. First operand 1868 states and 2718 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:22,268 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:22,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:22,574 INFO L93 Difference]: Finished difference Result 3805 states and 5544 transitions. [2021-11-20 05:54:22,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:22,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 195 [2021-11-20 05:54:22,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:22,577 INFO L225 Difference]: With dead ends: 3805 [2021-11-20 05:54:22,578 INFO L226 Difference]: Without dead ends: 1960 [2021-11-20 05:54:22,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:22,580 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 30 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:22,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 569 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 181 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:54:22,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-11-20 05:54:22,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1868. [2021-11-20 05:54:22,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 1.4520621317621853) internal successors, (2711), 1867 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:22,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2711 transitions. [2021-11-20 05:54:22,641 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2711 transitions. Word has length 195 [2021-11-20 05:54:22,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:22,642 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 2711 transitions. [2021-11-20 05:54:22,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:22,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2711 transitions. [2021-11-20 05:54:22,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-20 05:54:22,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:22,647 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:22,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-11-20 05:54:22,647 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:22,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:22,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1884826425, now seen corresponding path program 1 times [2021-11-20 05:54:22,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:22,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377157224] [2021-11-20 05:54:22,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:22,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-20 05:54:22,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:22,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377157224] [2021-11-20 05:54:22,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377157224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:22,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:22,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:22,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329950934] [2021-11-20 05:54:22,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:22,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:22,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:22,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:22,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:22,741 INFO L87 Difference]: Start difference. First operand 1868 states and 2711 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:24,441 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:24,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:24,816 INFO L93 Difference]: Finished difference Result 4182 states and 6105 transitions. [2021-11-20 05:54:24,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:24,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 197 [2021-11-20 05:54:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:24,822 INFO L225 Difference]: With dead ends: 4182 [2021-11-20 05:54:24,823 INFO L226 Difference]: Without dead ends: 2337 [2021-11-20 05:54:24,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:24,826 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 58 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:24,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 623 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 05:54:24,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-11-20 05:54:24,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2078. [2021-11-20 05:54:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2077 states have (on average 1.4838709677419355) internal successors, (3082), 2077 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:24,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3082 transitions. [2021-11-20 05:54:24,890 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 3082 transitions. Word has length 197 [2021-11-20 05:54:24,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:24,890 INFO L470 AbstractCegarLoop]: Abstraction has 2078 states and 3082 transitions. [2021-11-20 05:54:24,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 3082 transitions. [2021-11-20 05:54:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-20 05:54:24,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:24,896 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:24,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-11-20 05:54:24,896 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:24,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:24,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1192172572, now seen corresponding path program 1 times [2021-11-20 05:54:24,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:24,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432438122] [2021-11-20 05:54:24,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:24,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:54:25,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:25,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432438122] [2021-11-20 05:54:25,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432438122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:25,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:25,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:25,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568456909] [2021-11-20 05:54:25,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:25,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:25,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:25,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:25,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:25,013 INFO L87 Difference]: Start difference. First operand 2078 states and 3082 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:27,029 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:27,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:27,679 INFO L93 Difference]: Finished difference Result 4638 states and 6897 transitions. [2021-11-20 05:54:27,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:27,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 203 [2021-11-20 05:54:27,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:27,686 INFO L225 Difference]: With dead ends: 4638 [2021-11-20 05:54:27,686 INFO L226 Difference]: Without dead ends: 2583 [2021-11-20 05:54:27,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:27,690 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 101 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:27,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 672 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 283 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 05:54:27,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2021-11-20 05:54:27,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 2218. [2021-11-20 05:54:27,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 1.5006765899864682) internal successors, (3327), 2217 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:27,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 3327 transitions. [2021-11-20 05:54:27,763 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 3327 transitions. Word has length 203 [2021-11-20 05:54:27,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:27,764 INFO L470 AbstractCegarLoop]: Abstraction has 2218 states and 3327 transitions. [2021-11-20 05:54:27,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:27,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 3327 transitions. [2021-11-20 05:54:27,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-20 05:54:27,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:27,772 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:27,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-11-20 05:54:27,773 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:27,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:27,773 INFO L85 PathProgramCache]: Analyzing trace with hash 691282068, now seen corresponding path program 1 times [2021-11-20 05:54:27,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:27,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662501465] [2021-11-20 05:54:27,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:27,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:54:27,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:27,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662501465] [2021-11-20 05:54:27,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662501465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:27,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:27,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:27,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373068504] [2021-11-20 05:54:27,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:27,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:27,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:27,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:27,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:27,895 INFO L87 Difference]: Start difference. First operand 2218 states and 3327 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:29,904 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:30,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:30,337 INFO L93 Difference]: Finished difference Result 4738 states and 7072 transitions. [2021-11-20 05:54:30,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:30,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 204 [2021-11-20 05:54:30,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:30,346 INFO L225 Difference]: With dead ends: 4738 [2021-11-20 05:54:30,346 INFO L226 Difference]: Without dead ends: 2543 [2021-11-20 05:54:30,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:30,350 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 90 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:30,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 660 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:54:30,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2021-11-20 05:54:30,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2223. [2021-11-20 05:54:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 1.4995499549954996) internal successors, (3332), 2222 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3332 transitions. [2021-11-20 05:54:30,424 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3332 transitions. Word has length 204 [2021-11-20 05:54:30,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:30,424 INFO L470 AbstractCegarLoop]: Abstraction has 2223 states and 3332 transitions. [2021-11-20 05:54:30,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:30,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3332 transitions. [2021-11-20 05:54:30,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-20 05:54:30,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:30,430 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:30,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-11-20 05:54:30,431 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:30,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:30,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1902258252, now seen corresponding path program 1 times [2021-11-20 05:54:30,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:30,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251468794] [2021-11-20 05:54:30,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:30,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 133 proven. 4 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-20 05:54:30,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:30,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251468794] [2021-11-20 05:54:30,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251468794] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:54:30,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006279346] [2021-11-20 05:54:30,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:30,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:30,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:54:30,590 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:54:30,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:54:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:30,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 05:54:30,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:54:30,980 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:54:30,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:54:31,172 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:54:31,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:54:31,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-20 05:54:31,499 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:54:31,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:54:31,828 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:54:31,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:54:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 127 proven. 72 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-20 05:54:31,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:54:32,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-20 05:54:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-20 05:54:32,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006279346] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:54:32,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:54:32,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 9] total 10 [2021-11-20 05:54:32,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574636877] [2021-11-20 05:54:32,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:32,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:32,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:32,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:32,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:54:32,326 INFO L87 Difference]: Start difference. First operand 2223 states and 3332 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:33,355 INFO L93 Difference]: Finished difference Result 5228 states and 7850 transitions. [2021-11-20 05:54:33,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:33,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2021-11-20 05:54:33,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:33,363 INFO L225 Difference]: With dead ends: 5228 [2021-11-20 05:54:33,364 INFO L226 Difference]: Without dead ends: 3028 [2021-11-20 05:54:33,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:54:33,368 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 119 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:33,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 336 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 05:54:33,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-11-20 05:54:33,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 2502. [2021-11-20 05:54:33,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 1.5333866453418632) internal successors, (3835), 2501 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:33,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 3835 transitions. [2021-11-20 05:54:33,483 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 3835 transitions. Word has length 208 [2021-11-20 05:54:33,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:33,484 INFO L470 AbstractCegarLoop]: Abstraction has 2502 states and 3835 transitions. [2021-11-20 05:54:33,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:33,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 3835 transitions. [2021-11-20 05:54:33,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-20 05:54:33,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:33,490 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:33,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:54:33,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:33,717 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:33,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:33,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1166573507, now seen corresponding path program 1 times [2021-11-20 05:54:33,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:33,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785804025] [2021-11-20 05:54:33,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:33,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 135 proven. 3 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-11-20 05:54:33,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:33,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785804025] [2021-11-20 05:54:33,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785804025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:54:33,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303207907] [2021-11-20 05:54:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:33,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:33,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:54:33,853 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:54:33,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:54:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:34,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 05:54:34,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:54:34,206 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:54:34,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:54:34,345 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:54:34,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:54:34,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-20 05:54:34,665 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:54:34,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:54:34,937 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:54:34,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:54:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 129 proven. 71 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-20 05:54:34,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:54:35,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-20 05:54:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-20 05:54:35,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303207907] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:54:35,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:54:35,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 9] total 10 [2021-11-20 05:54:35,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547126365] [2021-11-20 05:54:35,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:35,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:35,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:35,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:35,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:54:35,327 INFO L87 Difference]: Start difference. First operand 2502 states and 3835 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:36,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:36,565 INFO L93 Difference]: Finished difference Result 5703 states and 8738 transitions. [2021-11-20 05:54:36,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:36,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 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 209 [2021-11-20 05:54:36,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:36,569 INFO L225 Difference]: With dead ends: 5703 [2021-11-20 05:54:36,569 INFO L226 Difference]: Without dead ends: 3224 [2021-11-20 05:54:36,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:54:36,572 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 118 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:36,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 348 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 05:54:36,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3224 states. [2021-11-20 05:54:36,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3224 to 2603. [2021-11-20 05:54:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 1.558032282859339) internal successors, (4054), 2602 states have internal predecessors, (4054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:36,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 4054 transitions. [2021-11-20 05:54:36,633 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 4054 transitions. Word has length 209 [2021-11-20 05:54:36,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:36,633 INFO L470 AbstractCegarLoop]: Abstraction has 2603 states and 4054 transitions. [2021-11-20 05:54:36,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:36,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 4054 transitions. [2021-11-20 05:54:36,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-20 05:54:36,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:36,639 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:36,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 05:54:36,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:36,853 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:36,853 INFO L85 PathProgramCache]: Analyzing trace with hash 686731706, now seen corresponding path program 1 times [2021-11-20 05:54:36,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:36,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162305869] [2021-11-20 05:54:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:36,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:54:36,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:36,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162305869] [2021-11-20 05:54:36,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162305869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:36,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:36,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:36,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510345639] [2021-11-20 05:54:36,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:36,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:36,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:36,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:36,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:36,985 INFO L87 Difference]: Start difference. First operand 2603 states and 4054 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:38,992 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:39,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:39,427 INFO L93 Difference]: Finished difference Result 5506 states and 8519 transitions. [2021-11-20 05:54:39,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:39,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 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 216 [2021-11-20 05:54:39,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:39,431 INFO L225 Difference]: With dead ends: 5506 [2021-11-20 05:54:39,431 INFO L226 Difference]: Without dead ends: 2926 [2021-11-20 05:54:39,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:39,434 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 95 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:39,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 650 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 253 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:54:39,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-11-20 05:54:39,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2603. [2021-11-20 05:54:39,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 1.556110684089162) internal successors, (4049), 2602 states have internal predecessors, (4049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:39,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 4049 transitions. [2021-11-20 05:54:39,523 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 4049 transitions. Word has length 216 [2021-11-20 05:54:39,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:39,523 INFO L470 AbstractCegarLoop]: Abstraction has 2603 states and 4049 transitions. [2021-11-20 05:54:39,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:39,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 4049 transitions. [2021-11-20 05:54:39,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-20 05:54:39,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:39,530 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:39,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-11-20 05:54:39,530 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:39,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:39,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1495202626, now seen corresponding path program 1 times [2021-11-20 05:54:39,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:39,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114989043] [2021-11-20 05:54:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:39,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 05:54:39,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:39,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114989043] [2021-11-20 05:54:39,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114989043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:39,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:39,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:39,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762101289] [2021-11-20 05:54:39,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:39,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:39,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:39,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:39,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:39,653 INFO L87 Difference]: Start difference. First operand 2603 states and 4049 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:41,588 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:42,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:42,050 INFO L93 Difference]: Finished difference Result 5854 states and 9075 transitions. [2021-11-20 05:54:42,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:42,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 217 [2021-11-20 05:54:42,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:42,054 INFO L225 Difference]: With dead ends: 5854 [2021-11-20 05:54:42,054 INFO L226 Difference]: Without dead ends: 3274 [2021-11-20 05:54:42,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:42,057 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 94 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:42,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 663 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:54:42,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3274 states. [2021-11-20 05:54:42,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3274 to 2799. [2021-11-20 05:54:42,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2799 states, 2798 states have (on average 1.5696926375982845) internal successors, (4392), 2798 states have internal predecessors, (4392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:42,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2799 states to 2799 states and 4392 transitions. [2021-11-20 05:54:42,169 INFO L78 Accepts]: Start accepts. Automaton has 2799 states and 4392 transitions. Word has length 217 [2021-11-20 05:54:42,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:42,170 INFO L470 AbstractCegarLoop]: Abstraction has 2799 states and 4392 transitions. [2021-11-20 05:54:42,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:42,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2799 states and 4392 transitions. [2021-11-20 05:54:42,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-20 05:54:42,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:42,176 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:42,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-11-20 05:54:42,176 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:42,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:42,177 INFO L85 PathProgramCache]: Analyzing trace with hash 955057154, now seen corresponding path program 1 times [2021-11-20 05:54:42,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:42,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382345870] [2021-11-20 05:54:42,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:42,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:54:42,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:42,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382345870] [2021-11-20 05:54:42,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382345870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:42,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:42,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:42,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649008606] [2021-11-20 05:54:42,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:42,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:42,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:42,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:42,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:42,280 INFO L87 Difference]: Start difference. First operand 2799 states and 4392 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:43,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:43,578 INFO L93 Difference]: Finished difference Result 5888 states and 9185 transitions. [2021-11-20 05:54:43,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:43,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 217 [2021-11-20 05:54:43,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:43,582 INFO L225 Difference]: With dead ends: 5888 [2021-11-20 05:54:43,582 INFO L226 Difference]: Without dead ends: 3112 [2021-11-20 05:54:43,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:43,587 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 93 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:43,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 648 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 05:54:43,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-11-20 05:54:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2799. [2021-11-20 05:54:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2799 states, 2798 states have (on average 1.5679056468906363) internal successors, (4387), 2798 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:43,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2799 states to 2799 states and 4387 transitions. [2021-11-20 05:54:43,693 INFO L78 Accepts]: Start accepts. Automaton has 2799 states and 4387 transitions. Word has length 217 [2021-11-20 05:54:43,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:43,694 INFO L470 AbstractCegarLoop]: Abstraction has 2799 states and 4387 transitions. [2021-11-20 05:54:43,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:43,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2799 states and 4387 transitions. [2021-11-20 05:54:43,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-20 05:54:43,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:43,701 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:43,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-11-20 05:54:43,701 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:43,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:43,704 INFO L85 PathProgramCache]: Analyzing trace with hash -678258794, now seen corresponding path program 1 times [2021-11-20 05:54:43,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:43,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286702641] [2021-11-20 05:54:43,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:43,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:54:43,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:43,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286702641] [2021-11-20 05:54:43,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286702641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:43,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:43,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:43,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158098046] [2021-11-20 05:54:43,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:43,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:43,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:43,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:43,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:43,808 INFO L87 Difference]: Start difference. First operand 2799 states and 4387 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:45,816 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:46,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:46,240 INFO L93 Difference]: Finished difference Result 5888 states and 9175 transitions. [2021-11-20 05:54:46,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:46,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 218 [2021-11-20 05:54:46,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:46,244 INFO L225 Difference]: With dead ends: 5888 [2021-11-20 05:54:46,244 INFO L226 Difference]: Without dead ends: 3112 [2021-11-20 05:54:46,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:46,247 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 97 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:46,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 646 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:54:46,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-11-20 05:54:46,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2799. [2021-11-20 05:54:46,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2799 states, 2798 states have (on average 1.5661186561829878) internal successors, (4382), 2798 states have internal predecessors, (4382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2799 states to 2799 states and 4382 transitions. [2021-11-20 05:54:46,355 INFO L78 Accepts]: Start accepts. Automaton has 2799 states and 4382 transitions. Word has length 218 [2021-11-20 05:54:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:46,355 INFO L470 AbstractCegarLoop]: Abstraction has 2799 states and 4382 transitions. [2021-11-20 05:54:46,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:46,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2799 states and 4382 transitions. [2021-11-20 05:54:46,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-20 05:54:46,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:46,361 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:46,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-11-20 05:54:46,362 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:46,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:46,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1495279150, now seen corresponding path program 1 times [2021-11-20 05:54:46,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:46,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39471324] [2021-11-20 05:54:46,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:46,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 05:54:46,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:46,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39471324] [2021-11-20 05:54:46,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39471324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:46,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:46,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:46,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335180747] [2021-11-20 05:54:46,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:46,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:46,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:46,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:46,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:46,458 INFO L87 Difference]: Start difference. First operand 2799 states and 4382 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:48,467 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:48,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:48,902 INFO L93 Difference]: Finished difference Result 5994 states and 9300 transitions. [2021-11-20 05:54:48,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:48,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 218 [2021-11-20 05:54:48,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:48,905 INFO L225 Difference]: With dead ends: 5994 [2021-11-20 05:54:48,905 INFO L226 Difference]: Without dead ends: 3218 [2021-11-20 05:54:48,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:48,907 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 83 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:48,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 653 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 253 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:54:48,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3218 states. [2021-11-20 05:54:48,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3218 to 2736. [2021-11-20 05:54:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 2735 states have (on average 1.5586837294332725) internal successors, (4263), 2735 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 4263 transitions. [2021-11-20 05:54:48,978 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 4263 transitions. Word has length 218 [2021-11-20 05:54:48,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:48,978 INFO L470 AbstractCegarLoop]: Abstraction has 2736 states and 4263 transitions. [2021-11-20 05:54:48,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:48,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 4263 transitions. [2021-11-20 05:54:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-20 05:54:48,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:48,983 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:48,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-11-20 05:54:48,983 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:48,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1713395998, now seen corresponding path program 1 times [2021-11-20 05:54:48,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:48,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300983730] [2021-11-20 05:54:48,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:48,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:54:49,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:49,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300983730] [2021-11-20 05:54:49,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300983730] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:49,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:49,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:49,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100397233] [2021-11-20 05:54:49,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:49,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:49,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:49,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:49,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:49,085 INFO L87 Difference]: Start difference. First operand 2736 states and 4263 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:50,814 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:51,191 INFO L93 Difference]: Finished difference Result 5797 states and 8997 transitions. [2021-11-20 05:54:51,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:51,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 219 [2021-11-20 05:54:51,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:51,199 INFO L225 Difference]: With dead ends: 5797 [2021-11-20 05:54:51,199 INFO L226 Difference]: Without dead ends: 3084 [2021-11-20 05:54:51,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:51,202 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 95 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:51,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 644 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 05:54:51,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2021-11-20 05:54:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 2736. [2021-11-20 05:54:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 2735 states have (on average 1.5568555758683729) internal successors, (4258), 2735 states have internal predecessors, (4258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:51,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 4258 transitions. [2021-11-20 05:54:51,286 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 4258 transitions. Word has length 219 [2021-11-20 05:54:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:51,286 INFO L470 AbstractCegarLoop]: Abstraction has 2736 states and 4258 transitions. [2021-11-20 05:54:51,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:51,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 4258 transitions. [2021-11-20 05:54:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-20 05:54:51,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:51,290 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:51,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-11-20 05:54:51,290 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:51,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:51,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1558215921, now seen corresponding path program 1 times [2021-11-20 05:54:51,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:51,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523168401] [2021-11-20 05:54:51,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:51,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:54:51,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:51,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523168401] [2021-11-20 05:54:51,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523168401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:51,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:51,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:51,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735975562] [2021-11-20 05:54:51,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:51,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:51,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:51,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:51,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:51,389 INFO L87 Difference]: Start difference. First operand 2736 states and 4258 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:52,851 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:53,259 INFO L93 Difference]: Finished difference Result 5797 states and 8987 transitions. [2021-11-20 05:54:53,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:53,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 220 [2021-11-20 05:54:53,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:53,262 INFO L225 Difference]: With dead ends: 5797 [2021-11-20 05:54:53,263 INFO L226 Difference]: Without dead ends: 3084 [2021-11-20 05:54:53,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:53,266 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 93 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:53,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 642 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 05:54:53,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2021-11-20 05:54:53,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 2736. [2021-11-20 05:54:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 2735 states have (on average 1.5550274223034735) internal successors, (4253), 2735 states have internal predecessors, (4253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 4253 transitions. [2021-11-20 05:54:53,348 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 4253 transitions. Word has length 220 [2021-11-20 05:54:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:53,349 INFO L470 AbstractCegarLoop]: Abstraction has 2736 states and 4253 transitions. [2021-11-20 05:54:53,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 4253 transitions. [2021-11-20 05:54:53,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-20 05:54:53,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:53,353 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:53,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-11-20 05:54:53,354 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:53,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:53,354 INFO L85 PathProgramCache]: Analyzing trace with hash -239433767, now seen corresponding path program 1 times [2021-11-20 05:54:53,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:53,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357454743] [2021-11-20 05:54:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:53,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:54:53,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:53,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357454743] [2021-11-20 05:54:53,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357454743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:53,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:53,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:53,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823915923] [2021-11-20 05:54:53,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:53,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:53,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:53,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:53,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:53,455 INFO L87 Difference]: Start difference. First operand 2736 states and 4253 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:54,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:54,691 INFO L93 Difference]: Finished difference Result 5747 states and 8917 transitions. [2021-11-20 05:54:54,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:54,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 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 221 [2021-11-20 05:54:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:54,695 INFO L225 Difference]: With dead ends: 5747 [2021-11-20 05:54:54,695 INFO L226 Difference]: Without dead ends: 3034 [2021-11-20 05:54:54,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:54,699 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 84 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:54,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 628 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 05:54:54,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2021-11-20 05:54:54,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 2736. [2021-11-20 05:54:54,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 2735 states have (on average 1.553199268738574) internal successors, (4248), 2735 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 4248 transitions. [2021-11-20 05:54:54,784 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 4248 transitions. Word has length 221 [2021-11-20 05:54:54,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:54,784 INFO L470 AbstractCegarLoop]: Abstraction has 2736 states and 4248 transitions. [2021-11-20 05:54:54,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:54,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 4248 transitions. [2021-11-20 05:54:54,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-20 05:54:54,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:54,791 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:54,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-11-20 05:54:54,791 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:54,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:54,792 INFO L85 PathProgramCache]: Analyzing trace with hash 948740383, now seen corresponding path program 1 times [2021-11-20 05:54:54,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:54,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617683565] [2021-11-20 05:54:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:54,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 138 proven. 6 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-11-20 05:54:54,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:54,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617683565] [2021-11-20 05:54:54,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617683565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:54:54,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652415838] [2021-11-20 05:54:54,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:54,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:54,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:54:54,925 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:54:54,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:54:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:55,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 05:54:55,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:54:55,248 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:54:55,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:54:55,403 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:54:55,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:54:55,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-20 05:54:55,724 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:54:55,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:54:55,919 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:54:55,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:54:55,953 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 132 proven. 108 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-11-20 05:54:55,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:54:56,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-20 05:54:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-20 05:54:56,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652415838] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:54:56,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:54:56,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 9] total 11 [2021-11-20 05:54:56,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644201677] [2021-11-20 05:54:56,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:56,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:56,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:56,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:56,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:54:56,375 INFO L87 Difference]: Start difference. First operand 2736 states and 4248 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:58,389 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:54:58,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:58,841 INFO L93 Difference]: Finished difference Result 5968 states and 9158 transitions. [2021-11-20 05:54:58,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:58,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 225 [2021-11-20 05:54:58,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:58,844 INFO L225 Difference]: With dead ends: 5968 [2021-11-20 05:54:58,844 INFO L226 Difference]: Without dead ends: 3255 [2021-11-20 05:54:58,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:54:58,846 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 130 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:58,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 348 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:54:58,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2021-11-20 05:54:58,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2736. [2021-11-20 05:54:58,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 2735 states have (on average 1.5455210237659964) internal successors, (4227), 2735 states have internal predecessors, (4227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 4227 transitions. [2021-11-20 05:54:58,961 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 4227 transitions. Word has length 225 [2021-11-20 05:54:58,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:58,961 INFO L470 AbstractCegarLoop]: Abstraction has 2736 states and 4227 transitions. [2021-11-20 05:54:58,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:58,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 4227 transitions. [2021-11-20 05:54:58,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-20 05:54:58,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:58,967 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:59,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:54:59,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:59,193 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:59,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:59,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1734818801, now seen corresponding path program 1 times [2021-11-20 05:54:59,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:59,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943730321] [2021-11-20 05:54:59,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:59,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-20 05:54:59,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:59,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943730321] [2021-11-20 05:54:59,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943730321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:59,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:59,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:59,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884622945] [2021-11-20 05:54:59,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:59,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:59,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:59,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:59,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:59,312 INFO L87 Difference]: Start difference. First operand 2736 states and 4227 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:00,434 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:00,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:00,804 INFO L93 Difference]: Finished difference Result 5820 states and 8976 transitions. [2021-11-20 05:55:00,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:00,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 226 [2021-11-20 05:55:00,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:00,808 INFO L225 Difference]: With dead ends: 5820 [2021-11-20 05:55:00,808 INFO L226 Difference]: Without dead ends: 3107 [2021-11-20 05:55:00,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:00,810 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 44 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:00,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 559 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 05:55:00,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-11-20 05:55:00,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 2918. [2021-11-20 05:55:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2918 states, 2917 states have (on average 1.5570791909496058) internal successors, (4542), 2917 states have internal predecessors, (4542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:00,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2918 states to 2918 states and 4542 transitions. [2021-11-20 05:55:00,876 INFO L78 Accepts]: Start accepts. Automaton has 2918 states and 4542 transitions. Word has length 226 [2021-11-20 05:55:00,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:00,876 INFO L470 AbstractCegarLoop]: Abstraction has 2918 states and 4542 transitions. [2021-11-20 05:55:00,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:00,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2918 states and 4542 transitions. [2021-11-20 05:55:00,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-20 05:55:00,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:00,879 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:00,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-11-20 05:55:00,879 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:00,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:00,880 INFO L85 PathProgramCache]: Analyzing trace with hash -952720548, now seen corresponding path program 1 times [2021-11-20 05:55:00,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:00,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439643961] [2021-11-20 05:55:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:00,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 05:55:01,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:01,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439643961] [2021-11-20 05:55:01,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439643961] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:01,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:01,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:01,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680497506] [2021-11-20 05:55:01,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:01,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:01,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:01,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:01,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:01,037 INFO L87 Difference]: Start difference. First operand 2918 states and 4542 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:03,045 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:03,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:03,460 INFO L93 Difference]: Finished difference Result 6295 states and 9732 transitions. [2021-11-20 05:55:03,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:03,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 231 [2021-11-20 05:55:03,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:03,464 INFO L225 Difference]: With dead ends: 6295 [2021-11-20 05:55:03,464 INFO L226 Difference]: Without dead ends: 3400 [2021-11-20 05:55:03,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:03,466 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 95 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:03,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 651 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 253 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:55:03,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2021-11-20 05:55:03,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 2918. [2021-11-20 05:55:03,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2918 states, 2917 states have (on average 1.5546794652039766) internal successors, (4535), 2917 states have internal predecessors, (4535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2918 states to 2918 states and 4535 transitions. [2021-11-20 05:55:03,531 INFO L78 Accepts]: Start accepts. Automaton has 2918 states and 4535 transitions. Word has length 231 [2021-11-20 05:55:03,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:03,532 INFO L470 AbstractCegarLoop]: Abstraction has 2918 states and 4535 transitions. [2021-11-20 05:55:03,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:03,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2918 states and 4535 transitions. [2021-11-20 05:55:03,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-20 05:55:03,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:03,535 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:03,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-11-20 05:55:03,536 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash 826335124, now seen corresponding path program 1 times [2021-11-20 05:55:03,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:03,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191702534] [2021-11-20 05:55:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:03,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:55:03,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:03,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191702534] [2021-11-20 05:55:03,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191702534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:03,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:03,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:03,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248237588] [2021-11-20 05:55:03,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:03,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:03,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:03,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:03,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:03,639 INFO L87 Difference]: Start difference. First operand 2918 states and 4535 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:05,649 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:06,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:06,072 INFO L93 Difference]: Finished difference Result 6111 states and 9481 transitions. [2021-11-20 05:55:06,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:06,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2021-11-20 05:55:06,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:06,075 INFO L225 Difference]: With dead ends: 6111 [2021-11-20 05:55:06,075 INFO L226 Difference]: Without dead ends: 3216 [2021-11-20 05:55:06,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:06,077 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 72 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:06,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 626 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:55:06,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3216 states. [2021-11-20 05:55:06,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3216 to 2963. [2021-11-20 05:55:06,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2963 states, 2962 states have (on average 1.5597569209993247) internal successors, (4620), 2962 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:06,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 4620 transitions. [2021-11-20 05:55:06,172 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 4620 transitions. Word has length 231 [2021-11-20 05:55:06,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:06,172 INFO L470 AbstractCegarLoop]: Abstraction has 2963 states and 4620 transitions. [2021-11-20 05:55:06,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:06,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 4620 transitions. [2021-11-20 05:55:06,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-20 05:55:06,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:06,175 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:06,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-11-20 05:55:06,175 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:06,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:06,176 INFO L85 PathProgramCache]: Analyzing trace with hash -853913575, now seen corresponding path program 1 times [2021-11-20 05:55:06,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:06,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942197803] [2021-11-20 05:55:06,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:06,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 262 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:55:06,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:06,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942197803] [2021-11-20 05:55:06,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942197803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:06,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:06,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:06,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79565425] [2021-11-20 05:55:06,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:06,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:06,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:06,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:06,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:06,299 INFO L87 Difference]: Start difference. First operand 2963 states and 4620 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:08,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:08,732 INFO L93 Difference]: Finished difference Result 6156 states and 9561 transitions. [2021-11-20 05:55:08,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:08,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2021-11-20 05:55:08,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:08,758 INFO L225 Difference]: With dead ends: 6156 [2021-11-20 05:55:08,758 INFO L226 Difference]: Without dead ends: 3216 [2021-11-20 05:55:08,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:08,760 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 67 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:08,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 624 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:55:08,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3216 states. [2021-11-20 05:55:08,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3216 to 2983. [2021-11-20 05:55:08,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2983 states, 2982 states have (on average 1.5576794097920859) internal successors, (4645), 2982 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:08,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2983 states to 2983 states and 4645 transitions. [2021-11-20 05:55:08,833 INFO L78 Accepts]: Start accepts. Automaton has 2983 states and 4645 transitions. Word has length 231 [2021-11-20 05:55:08,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:08,837 INFO L470 AbstractCegarLoop]: Abstraction has 2983 states and 4645 transitions. [2021-11-20 05:55:08,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:08,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2983 states and 4645 transitions. [2021-11-20 05:55:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-20 05:55:08,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:08,842 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:08,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-11-20 05:55:08,842 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:08,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:08,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1391434360, now seen corresponding path program 1 times [2021-11-20 05:55:08,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:08,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122621921] [2021-11-20 05:55:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:08,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:08,944 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 05:55:08,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:08,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122621921] [2021-11-20 05:55:08,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122621921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:08,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:08,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:08,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983889975] [2021-11-20 05:55:08,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:08,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:08,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:08,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:08,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:08,948 INFO L87 Difference]: Start difference. First operand 2983 states and 4645 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:10,955 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:11,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:11,381 INFO L93 Difference]: Finished difference Result 6376 states and 9854 transitions. [2021-11-20 05:55:11,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:11,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 232 [2021-11-20 05:55:11,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:11,385 INFO L225 Difference]: With dead ends: 6376 [2021-11-20 05:55:11,385 INFO L226 Difference]: Without dead ends: 3416 [2021-11-20 05:55:11,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:11,387 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 93 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:11,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 649 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 248 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:55:11,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2021-11-20 05:55:11,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 2983. [2021-11-20 05:55:11,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2983 states, 2982 states have (on average 1.5553319919517103) internal successors, (4638), 2982 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:11,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2983 states to 2983 states and 4638 transitions. [2021-11-20 05:55:11,518 INFO L78 Accepts]: Start accepts. Automaton has 2983 states and 4638 transitions. Word has length 232 [2021-11-20 05:55:11,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:11,518 INFO L470 AbstractCegarLoop]: Abstraction has 2983 states and 4638 transitions. [2021-11-20 05:55:11,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2983 states and 4638 transitions. [2021-11-20 05:55:11,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-20 05:55:11,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:11,521 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:11,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-11-20 05:55:11,521 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:11,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:11,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1845940076, now seen corresponding path program 1 times [2021-11-20 05:55:11,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:11,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518505268] [2021-11-20 05:55:11,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:11,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:55:11,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:11,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518505268] [2021-11-20 05:55:11,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518505268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:11,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:11,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:11,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841466604] [2021-11-20 05:55:11,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:11,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:11,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:11,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:11,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:11,621 INFO L87 Difference]: Start difference. First operand 2983 states and 4638 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:13,637 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:14,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:14,005 INFO L93 Difference]: Finished difference Result 6166 states and 9552 transitions. [2021-11-20 05:55:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:14,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 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 232 [2021-11-20 05:55:14,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:14,009 INFO L225 Difference]: With dead ends: 6166 [2021-11-20 05:55:14,009 INFO L226 Difference]: Without dead ends: 3206 [2021-11-20 05:55:14,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:14,011 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 68 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:14,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 622 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:55:14,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2021-11-20 05:55:14,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 2983. [2021-11-20 05:55:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2983 states, 2982 states have (on average 1.5536552649228705) internal successors, (4633), 2982 states have internal predecessors, (4633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2983 states to 2983 states and 4633 transitions. [2021-11-20 05:55:14,083 INFO L78 Accepts]: Start accepts. Automaton has 2983 states and 4633 transitions. Word has length 232 [2021-11-20 05:55:14,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:14,084 INFO L470 AbstractCegarLoop]: Abstraction has 2983 states and 4633 transitions. [2021-11-20 05:55:14,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2983 states and 4633 transitions. [2021-11-20 05:55:14,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-20 05:55:14,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:14,087 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:14,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-11-20 05:55:14,088 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:14,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:14,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1707325135, now seen corresponding path program 1 times [2021-11-20 05:55:14,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:14,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370716281] [2021-11-20 05:55:14,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:14,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:55:14,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:14,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370716281] [2021-11-20 05:55:14,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370716281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:14,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:14,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:14,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525878006] [2021-11-20 05:55:14,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:14,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:14,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:14,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:14,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:14,196 INFO L87 Difference]: Start difference. First operand 2983 states and 4633 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:15,890 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:16,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:16,255 INFO L93 Difference]: Finished difference Result 6156 states and 9532 transitions. [2021-11-20 05:55:16,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:16,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 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 232 [2021-11-20 05:55:16,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:16,259 INFO L225 Difference]: With dead ends: 6156 [2021-11-20 05:55:16,259 INFO L226 Difference]: Without dead ends: 3196 [2021-11-20 05:55:16,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:16,261 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 62 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:16,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 618 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 05:55:16,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2021-11-20 05:55:16,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2988. [2021-11-20 05:55:16,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2988 states, 2987 states have (on average 1.55272849012387) internal successors, (4638), 2987 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:16,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2988 states to 2988 states and 4638 transitions. [2021-11-20 05:55:16,368 INFO L78 Accepts]: Start accepts. Automaton has 2988 states and 4638 transitions. Word has length 232 [2021-11-20 05:55:16,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:16,368 INFO L470 AbstractCegarLoop]: Abstraction has 2988 states and 4638 transitions. [2021-11-20 05:55:16,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:16,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2988 states and 4638 transitions. [2021-11-20 05:55:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-20 05:55:16,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:16,373 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:16,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-11-20 05:55:16,374 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:16,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:16,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1123071989, now seen corresponding path program 1 times [2021-11-20 05:55:16,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:16,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469531714] [2021-11-20 05:55:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:16,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 262 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:55:16,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:16,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469531714] [2021-11-20 05:55:16,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469531714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:16,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:16,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:16,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441862263] [2021-11-20 05:55:16,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:16,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:16,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:16,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:16,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:16,474 INFO L87 Difference]: Start difference. First operand 2988 states and 4638 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:18,482 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:18,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:18,880 INFO L93 Difference]: Finished difference Result 6146 states and 9512 transitions. [2021-11-20 05:55:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:18,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 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 232 [2021-11-20 05:55:18,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:18,884 INFO L225 Difference]: With dead ends: 6146 [2021-11-20 05:55:18,884 INFO L226 Difference]: Without dead ends: 3181 [2021-11-20 05:55:18,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:18,886 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 59 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:18,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 614 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 217 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:55:18,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-11-20 05:55:18,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2993. [2021-11-20 05:55:18,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2992 states have (on average 1.5518048128342246) internal successors, (4643), 2992 states have internal predecessors, (4643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:18,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4643 transitions. [2021-11-20 05:55:18,999 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4643 transitions. Word has length 232 [2021-11-20 05:55:18,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:19,000 INFO L470 AbstractCegarLoop]: Abstraction has 2993 states and 4643 transitions. [2021-11-20 05:55:19,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:19,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4643 transitions. [2021-11-20 05:55:19,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-20 05:55:19,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:19,003 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:19,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-11-20 05:55:19,004 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:19,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:19,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1362565248, now seen corresponding path program 1 times [2021-11-20 05:55:19,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:19,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899041563] [2021-11-20 05:55:19,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:19,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 05:55:19,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:19,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899041563] [2021-11-20 05:55:19,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899041563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:19,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:19,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:19,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83538233] [2021-11-20 05:55:19,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:19,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:19,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:19,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:19,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:19,101 INFO L87 Difference]: Start difference. First operand 2993 states and 4643 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:20,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:20,115 INFO L93 Difference]: Finished difference Result 6396 states and 9850 transitions. [2021-11-20 05:55:20,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:20,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 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 233 [2021-11-20 05:55:20,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:20,118 INFO L225 Difference]: With dead ends: 6396 [2021-11-20 05:55:20,118 INFO L226 Difference]: Without dead ends: 3426 [2021-11-20 05:55:20,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:20,119 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 97 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:20,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 647 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 05:55:20,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2021-11-20 05:55:20,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 2993. [2021-11-20 05:55:20,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2992 states have (on average 1.5494652406417113) internal successors, (4636), 2992 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4636 transitions. [2021-11-20 05:55:20,190 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4636 transitions. Word has length 233 [2021-11-20 05:55:20,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:20,190 INFO L470 AbstractCegarLoop]: Abstraction has 2993 states and 4636 transitions. [2021-11-20 05:55:20,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:20,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4636 transitions. [2021-11-20 05:55:20,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-20 05:55:20,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:20,198 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:20,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-11-20 05:55:20,198 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:20,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:20,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1682172564, now seen corresponding path program 1 times [2021-11-20 05:55:20,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:20,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390218965] [2021-11-20 05:55:20,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:20,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 05:55:20,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:20,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390218965] [2021-11-20 05:55:20,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390218965] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:20,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:20,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:20,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079187791] [2021-11-20 05:55:20,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:20,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:20,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:20,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:20,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:20,295 INFO L87 Difference]: Start difference. First operand 2993 states and 4636 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:21,875 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:22,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:22,317 INFO L93 Difference]: Finished difference Result 6396 states and 9836 transitions. [2021-11-20 05:55:22,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:22,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 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 234 [2021-11-20 05:55:22,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:22,321 INFO L225 Difference]: With dead ends: 6396 [2021-11-20 05:55:22,321 INFO L226 Difference]: Without dead ends: 3426 [2021-11-20 05:55:22,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:22,323 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 95 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:22,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 645 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 05:55:22,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2021-11-20 05:55:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 2993. [2021-11-20 05:55:22,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2992 states have (on average 1.5471256684491979) internal successors, (4629), 2992 states have internal predecessors, (4629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:22,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4629 transitions. [2021-11-20 05:55:22,430 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4629 transitions. Word has length 234 [2021-11-20 05:55:22,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:22,430 INFO L470 AbstractCegarLoop]: Abstraction has 2993 states and 4629 transitions. [2021-11-20 05:55:22,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:22,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4629 transitions. [2021-11-20 05:55:22,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-20 05:55:22,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:22,434 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:22,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-11-20 05:55:22,434 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:22,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:22,435 INFO L85 PathProgramCache]: Analyzing trace with hash 206535685, now seen corresponding path program 1 times [2021-11-20 05:55:22,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:22,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304904168] [2021-11-20 05:55:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:22,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 05:55:22,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:22,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304904168] [2021-11-20 05:55:22,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304904168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:22,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:22,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:22,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9529434] [2021-11-20 05:55:22,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:22,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:22,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:22,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:22,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:22,514 INFO L87 Difference]: Start difference. First operand 2993 states and 4629 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:24,522 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:24,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:24,959 INFO L93 Difference]: Finished difference Result 6396 states and 9822 transitions. [2021-11-20 05:55:24,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:24,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 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 235 [2021-11-20 05:55:24,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:24,963 INFO L225 Difference]: With dead ends: 6396 [2021-11-20 05:55:24,963 INFO L226 Difference]: Without dead ends: 3426 [2021-11-20 05:55:24,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:24,965 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 93 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:24,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 643 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 248 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:55:24,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2021-11-20 05:55:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 2993. [2021-11-20 05:55:25,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2992 states have (on average 1.5447860962566844) internal successors, (4622), 2992 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:25,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4622 transitions. [2021-11-20 05:55:25,072 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4622 transitions. Word has length 235 [2021-11-20 05:55:25,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:25,073 INFO L470 AbstractCegarLoop]: Abstraction has 2993 states and 4622 transitions. [2021-11-20 05:55:25,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:25,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4622 transitions. [2021-11-20 05:55:25,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-20 05:55:25,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:25,077 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:25,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-11-20 05:55:25,077 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:25,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:25,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1047116075, now seen corresponding path program 1 times [2021-11-20 05:55:25,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:25,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838245562] [2021-11-20 05:55:25,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:25,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-20 05:55:25,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:25,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838245562] [2021-11-20 05:55:25,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838245562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:25,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:25,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:25,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873972234] [2021-11-20 05:55:25,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:25,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:25,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:25,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:25,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:25,184 INFO L87 Difference]: Start difference. First operand 2993 states and 4622 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:26,372 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:26,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:26,710 INFO L93 Difference]: Finished difference Result 6223 states and 9597 transitions. [2021-11-20 05:55:26,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:26,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 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 235 [2021-11-20 05:55:26,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:26,713 INFO L225 Difference]: With dead ends: 6223 [2021-11-20 05:55:26,713 INFO L226 Difference]: Without dead ends: 3253 [2021-11-20 05:55:26,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:26,716 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 28 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:26,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 579 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 05:55:26,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3253 states. [2021-11-20 05:55:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3253 to 3140. [2021-11-20 05:55:26,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 1.5504937878305192) internal successors, (4867), 3139 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4867 transitions. [2021-11-20 05:55:26,849 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4867 transitions. Word has length 235 [2021-11-20 05:55:26,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:26,849 INFO L470 AbstractCegarLoop]: Abstraction has 3140 states and 4867 transitions. [2021-11-20 05:55:26,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:26,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4867 transitions. [2021-11-20 05:55:26,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-20 05:55:26,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:26,852 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:26,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-11-20 05:55:26,853 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:26,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1833549713, now seen corresponding path program 1 times [2021-11-20 05:55:26,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:26,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54892187] [2021-11-20 05:55:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:26,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 05:55:26,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:26,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54892187] [2021-11-20 05:55:26,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54892187] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:26,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:26,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:26,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082841262] [2021-11-20 05:55:26,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:26,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:26,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:26,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:26,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:26,969 INFO L87 Difference]: Start difference. First operand 3140 states and 4867 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:28,976 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:29,387 INFO L93 Difference]: Finished difference Result 6620 states and 10214 transitions. [2021-11-20 05:55:29,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:29,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 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 236 [2021-11-20 05:55:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:29,391 INFO L225 Difference]: With dead ends: 6620 [2021-11-20 05:55:29,391 INFO L226 Difference]: Without dead ends: 3503 [2021-11-20 05:55:29,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:29,393 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 84 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:29,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 629 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:55:29,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3503 states. [2021-11-20 05:55:29,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3503 to 3140. [2021-11-20 05:55:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 1.5482637782733355) internal successors, (4860), 3139 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:29,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4860 transitions. [2021-11-20 05:55:29,516 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4860 transitions. Word has length 236 [2021-11-20 05:55:29,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:29,517 INFO L470 AbstractCegarLoop]: Abstraction has 3140 states and 4860 transitions. [2021-11-20 05:55:29,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:29,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4860 transitions. [2021-11-20 05:55:29,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-20 05:55:29,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:29,521 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:29,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-11-20 05:55:29,521 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:29,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:29,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1370956475, now seen corresponding path program 1 times [2021-11-20 05:55:29,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:29,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843290368] [2021-11-20 05:55:29,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:29,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:55:29,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:29,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843290368] [2021-11-20 05:55:29,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843290368] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:29,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:29,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:29,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015742592] [2021-11-20 05:55:29,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:29,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:29,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:29,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:29,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:29,630 INFO L87 Difference]: Start difference. First operand 3140 states and 4860 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:31,645 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:32,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:32,067 INFO L93 Difference]: Finished difference Result 6445 states and 9946 transitions. [2021-11-20 05:55:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:32,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 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 236 [2021-11-20 05:55:32,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:32,071 INFO L225 Difference]: With dead ends: 6445 [2021-11-20 05:55:32,071 INFO L226 Difference]: Without dead ends: 3328 [2021-11-20 05:55:32,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:32,079 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 55 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:32,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 612 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 217 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:55:32,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-11-20 05:55:32,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 3155. [2021-11-20 05:55:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 3154 states have (on average 1.5488268864933419) internal successors, (4885), 3154 states have internal predecessors, (4885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:32,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 4885 transitions. [2021-11-20 05:55:32,184 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 4885 transitions. Word has length 236 [2021-11-20 05:55:32,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:32,184 INFO L470 AbstractCegarLoop]: Abstraction has 3155 states and 4885 transitions. [2021-11-20 05:55:32,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:32,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 4885 transitions. [2021-11-20 05:55:32,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-20 05:55:32,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:32,188 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:32,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-11-20 05:55:32,188 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:32,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:32,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1109135621, now seen corresponding path program 1 times [2021-11-20 05:55:32,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:32,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493409566] [2021-11-20 05:55:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:32,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-20 05:55:32,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:32,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493409566] [2021-11-20 05:55:32,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493409566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:32,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:32,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:32,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661002992] [2021-11-20 05:55:32,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:32,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:32,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:32,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:32,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:32,269 INFO L87 Difference]: Start difference. First operand 3155 states and 4885 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:33,280 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:33,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:33,802 INFO L93 Difference]: Finished difference Result 6902 states and 10649 transitions. [2021-11-20 05:55:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:33,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 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 236 [2021-11-20 05:55:33,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:33,808 INFO L225 Difference]: With dead ends: 6902 [2021-11-20 05:55:33,808 INFO L226 Difference]: Without dead ends: 3770 [2021-11-20 05:55:33,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:33,812 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 83 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:33,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 655 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 05:55:33,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2021-11-20 05:55:33,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 3274. [2021-11-20 05:55:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3274 states, 3273 states have (on average 1.5523984112435074) internal successors, (5081), 3273 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3274 states to 3274 states and 5081 transitions. [2021-11-20 05:55:33,934 INFO L78 Accepts]: Start accepts. Automaton has 3274 states and 5081 transitions. Word has length 236 [2021-11-20 05:55:33,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:33,934 INFO L470 AbstractCegarLoop]: Abstraction has 3274 states and 5081 transitions. [2021-11-20 05:55:33,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:33,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3274 states and 5081 transitions. [2021-11-20 05:55:33,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-20 05:55:33,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:33,942 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:33,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-11-20 05:55:33,942 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:33,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:33,943 INFO L85 PathProgramCache]: Analyzing trace with hash 507377192, now seen corresponding path program 1 times [2021-11-20 05:55:33,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:33,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747811193] [2021-11-20 05:55:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:33,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 268 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:55:34,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:34,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747811193] [2021-11-20 05:55:34,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747811193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:34,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:34,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:34,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052994698] [2021-11-20 05:55:34,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:34,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:34,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:34,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:34,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:34,039 INFO L87 Difference]: Start difference. First operand 3274 states and 5081 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:36,046 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:36,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:36,447 INFO L93 Difference]: Finished difference Result 6688 states and 10348 transitions. [2021-11-20 05:55:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:36,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 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 237 [2021-11-20 05:55:36,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:36,451 INFO L225 Difference]: With dead ends: 6688 [2021-11-20 05:55:36,451 INFO L226 Difference]: Without dead ends: 3437 [2021-11-20 05:55:36,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:36,454 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 52 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:36,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 608 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:55:36,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3437 states. [2021-11-20 05:55:36,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3437 to 3279. [2021-11-20 05:55:36,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3279 states, 3278 states have (on average 1.551555826723612) internal successors, (5086), 3278 states have internal predecessors, (5086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3279 states to 3279 states and 5086 transitions. [2021-11-20 05:55:36,561 INFO L78 Accepts]: Start accepts. Automaton has 3279 states and 5086 transitions. Word has length 237 [2021-11-20 05:55:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:36,561 INFO L470 AbstractCegarLoop]: Abstraction has 3279 states and 5086 transitions. [2021-11-20 05:55:36,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:36,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3279 states and 5086 transitions. [2021-11-20 05:55:36,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-20 05:55:36,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:36,565 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:36,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-11-20 05:55:36,565 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:36,566 INFO L85 PathProgramCache]: Analyzing trace with hash 26333184, now seen corresponding path program 1 times [2021-11-20 05:55:36,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:36,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370689617] [2021-11-20 05:55:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:36,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:55:36,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:36,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370689617] [2021-11-20 05:55:36,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370689617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:36,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:36,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:36,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294487816] [2021-11-20 05:55:36,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:36,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:36,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:36,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:36,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:36,663 INFO L87 Difference]: Start difference. First operand 3279 states and 5086 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:38,672 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:39,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:39,075 INFO L93 Difference]: Finished difference Result 6693 states and 10348 transitions. [2021-11-20 05:55:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:39,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 238 [2021-11-20 05:55:39,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:39,079 INFO L225 Difference]: With dead ends: 6693 [2021-11-20 05:55:39,079 INFO L226 Difference]: Without dead ends: 3437 [2021-11-20 05:55:39,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:39,082 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 50 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:39,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 606 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:55:39,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3437 states. [2021-11-20 05:55:39,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3437 to 3284. [2021-11-20 05:55:39,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3284 states, 3283 states have (on average 1.5507158087115442) internal successors, (5091), 3283 states have internal predecessors, (5091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:39,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 5091 transitions. [2021-11-20 05:55:39,190 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 5091 transitions. Word has length 238 [2021-11-20 05:55:39,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:39,191 INFO L470 AbstractCegarLoop]: Abstraction has 3284 states and 5091 transitions. [2021-11-20 05:55:39,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:39,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 5091 transitions. [2021-11-20 05:55:39,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-20 05:55:39,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:39,197 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:39,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-11-20 05:55:39,198 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:39,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:39,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1580580231, now seen corresponding path program 1 times [2021-11-20 05:55:39,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:39,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659914612] [2021-11-20 05:55:39,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:39,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 245 proven. 32 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-20 05:55:39,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:39,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659914612] [2021-11-20 05:55:39,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659914612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:55:39,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68096916] [2021-11-20 05:55:39,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:39,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:39,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:39,335 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:39,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:55:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:39,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 05:55:39,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:39,653 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:55:39,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:55:39,807 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:55:39,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:55:39,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-20 05:55:40,117 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:55:40,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:55:40,214 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:55:40,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:55:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 238 proven. 128 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-20 05:55:40,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:40,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-20 05:55:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-20 05:55:40,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68096916] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:55:40,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:55:40,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 9] total 10 [2021-11-20 05:55:40,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693920281] [2021-11-20 05:55:40,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:40,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:40,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:40,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:40,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:55:40,663 INFO L87 Difference]: Start difference. First operand 3284 states and 5091 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:42,672 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:43,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:43,272 INFO L93 Difference]: Finished difference Result 7344 states and 11341 transitions. [2021-11-20 05:55:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:43,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 239 [2021-11-20 05:55:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:43,277 INFO L225 Difference]: With dead ends: 7344 [2021-11-20 05:55:43,278 INFO L226 Difference]: Without dead ends: 4083 [2021-11-20 05:55:43,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:55:43,280 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 142 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:43,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 346 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:55:43,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4083 states. [2021-11-20 05:55:43,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4083 to 3396. [2021-11-20 05:55:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3396 states, 3395 states have (on average 1.5407952871870398) internal successors, (5231), 3395 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 5231 transitions. [2021-11-20 05:55:43,444 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 5231 transitions. Word has length 239 [2021-11-20 05:55:43,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:43,444 INFO L470 AbstractCegarLoop]: Abstraction has 3396 states and 5231 transitions. [2021-11-20 05:55:43,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:43,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 5231 transitions. [2021-11-20 05:55:43,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-20 05:55:43,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:43,450 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:43,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:43,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-11-20 05:55:43,665 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:43,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:43,665 INFO L85 PathProgramCache]: Analyzing trace with hash 254366925, now seen corresponding path program 1 times [2021-11-20 05:55:43,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:43,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337068680] [2021-11-20 05:55:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:43,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:55:43,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:43,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337068680] [2021-11-20 05:55:43,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337068680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:43,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:43,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:43,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88072593] [2021-11-20 05:55:43,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:43,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:43,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:43,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:43,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:43,753 INFO L87 Difference]: Start difference. First operand 3396 states and 5231 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:44,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:44,964 INFO L93 Difference]: Finished difference Result 6912 states and 10618 transitions. [2021-11-20 05:55:44,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:44,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 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 239 [2021-11-20 05:55:44,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:44,968 INFO L225 Difference]: With dead ends: 6912 [2021-11-20 05:55:44,968 INFO L226 Difference]: Without dead ends: 3539 [2021-11-20 05:55:44,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:44,972 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 47 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:44,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 602 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 05:55:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3539 states. [2021-11-20 05:55:45,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3539 to 3401. [2021-11-20 05:55:45,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3401 states, 3400 states have (on average 1.54) internal successors, (5236), 3400 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 5236 transitions. [2021-11-20 05:55:45,108 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 5236 transitions. Word has length 239 [2021-11-20 05:55:45,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:45,109 INFO L470 AbstractCegarLoop]: Abstraction has 3401 states and 5236 transitions. [2021-11-20 05:55:45,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:45,109 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 5236 transitions. [2021-11-20 05:55:45,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-20 05:55:45,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:45,112 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:45,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-11-20 05:55:45,113 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:45,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:45,113 INFO L85 PathProgramCache]: Analyzing trace with hash 619751947, now seen corresponding path program 1 times [2021-11-20 05:55:45,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:45,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853933197] [2021-11-20 05:55:45,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:45,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 250 proven. 29 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-20 05:55:45,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:45,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853933197] [2021-11-20 05:55:45,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853933197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:55:45,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850437746] [2021-11-20 05:55:45,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:45,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:45,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:45,220 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:45,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:55:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:45,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 05:55:45,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:45,476 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:55:45,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:55:45,573 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:55:45,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:55:45,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-20 05:55:45,836 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:55:45,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:55:45,931 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:55:45,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:55:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 243 proven. 126 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-20 05:55:46,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:46,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-20 05:55:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-20 05:55:46,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850437746] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:55:46,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:55:46,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 9] total 10 [2021-11-20 05:55:46,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990191529] [2021-11-20 05:55:46,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:46,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:46,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:46,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:46,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:55:46,357 INFO L87 Difference]: Start difference. First operand 3401 states and 5236 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:48,366 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:48,956 INFO L93 Difference]: Finished difference Result 7298 states and 11134 transitions. [2021-11-20 05:55:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:48,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 240 [2021-11-20 05:55:48,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:48,960 INFO L225 Difference]: With dead ends: 7298 [2021-11-20 05:55:48,960 INFO L226 Difference]: Without dead ends: 3920 [2021-11-20 05:55:48,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:55:48,962 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 141 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:48,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 354 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:55:48,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2021-11-20 05:55:49,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 3387. [2021-11-20 05:55:49,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 3386 states have (on average 1.5298287064382752) internal successors, (5180), 3386 states have internal predecessors, (5180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:49,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 5180 transitions. [2021-11-20 05:55:49,078 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 5180 transitions. Word has length 240 [2021-11-20 05:55:49,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:49,079 INFO L470 AbstractCegarLoop]: Abstraction has 3387 states and 5180 transitions. [2021-11-20 05:55:49,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:49,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 5180 transitions. [2021-11-20 05:55:49,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-20 05:55:49,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:49,085 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:49,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:49,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:49,286 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:49,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:49,286 INFO L85 PathProgramCache]: Analyzing trace with hash 854668125, now seen corresponding path program 1 times [2021-11-20 05:55:49,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:49,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270228946] [2021-11-20 05:55:49,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:49,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 225 proven. 44 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2021-11-20 05:55:49,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:49,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270228946] [2021-11-20 05:55:49,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270228946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:55:49,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216301440] [2021-11-20 05:55:49,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:49,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:49,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:49,401 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:49,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:55:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:49,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 05:55:49,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:49,758 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:55:49,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:55:49,894 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:55:49,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:55:50,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-20 05:55:50,237 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:55:50,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:55:50,293 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:55:50,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:55:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 218 proven. 136 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-20 05:55:50,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:50,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-20 05:55:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-20 05:55:50,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216301440] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:55:50,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:55:50,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 9] total 10 [2021-11-20 05:55:50,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200510175] [2021-11-20 05:55:50,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:50,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:50,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:50,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:50,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:55:50,739 INFO L87 Difference]: Start difference. First operand 3387 states and 5180 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:52,749 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:53,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:53,273 INFO L93 Difference]: Finished difference Result 7270 states and 11022 transitions. [2021-11-20 05:55:53,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:53,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 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 241 [2021-11-20 05:55:53,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:53,278 INFO L225 Difference]: With dead ends: 7270 [2021-11-20 05:55:53,278 INFO L226 Difference]: Without dead ends: 3906 [2021-11-20 05:55:53,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:55:53,281 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 145 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:53,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 354 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:55:53,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3906 states. [2021-11-20 05:55:53,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3906 to 3387. [2021-11-20 05:55:53,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 3386 states have (on average 1.515357353809805) internal successors, (5131), 3386 states have internal predecessors, (5131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:53,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 5131 transitions. [2021-11-20 05:55:53,391 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 5131 transitions. Word has length 241 [2021-11-20 05:55:53,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:53,392 INFO L470 AbstractCegarLoop]: Abstraction has 3387 states and 5131 transitions. [2021-11-20 05:55:53,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:53,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 5131 transitions. [2021-11-20 05:55:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-20 05:55:53,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:53,396 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:53,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:53,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:53,596 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:53,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:53,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1667414737, now seen corresponding path program 1 times [2021-11-20 05:55:53,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:53,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077995841] [2021-11-20 05:55:53,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:53,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 230 proven. 41 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2021-11-20 05:55:53,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:53,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077995841] [2021-11-20 05:55:53,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077995841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:55:53,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083412418] [2021-11-20 05:55:53,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:53,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:53,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:53,735 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:53,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:55:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:53,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 05:55:53,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:54,003 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:55:54,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:55:54,148 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:55:54,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:55:54,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-20 05:55:54,432 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:55:54,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:55:54,491 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:55:54,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:55:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 223 proven. 134 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-11-20 05:55:54,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:54,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-20 05:55:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-20 05:55:54,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083412418] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:55:54,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:55:54,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 9] total 10 [2021-11-20 05:55:54,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336332865] [2021-11-20 05:55:54,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:54,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:54,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:54,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:54,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:55:54,939 INFO L87 Difference]: Start difference. First operand 3387 states and 5131 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:55,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:55,763 INFO L93 Difference]: Finished difference Result 7270 states and 10924 transitions. [2021-11-20 05:55:55,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:55,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 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 242 [2021-11-20 05:55:55,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:55,768 INFO L225 Difference]: With dead ends: 7270 [2021-11-20 05:55:55,768 INFO L226 Difference]: Without dead ends: 3906 [2021-11-20 05:55:55,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:55:55,770 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 143 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:55,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 354 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:55:55,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3906 states. [2021-11-20 05:55:55,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3906 to 3387. [2021-11-20 05:55:55,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 3386 states have (on average 1.500886001181335) internal successors, (5082), 3386 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 5082 transitions. [2021-11-20 05:55:55,915 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 5082 transitions. Word has length 242 [2021-11-20 05:55:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:55,915 INFO L470 AbstractCegarLoop]: Abstraction has 3387 states and 5082 transitions. [2021-11-20 05:55:55,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 5082 transitions. [2021-11-20 05:55:55,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-20 05:55:55,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:55,919 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:55,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 05:55:56,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:56,120 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:56,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:56,121 INFO L85 PathProgramCache]: Analyzing trace with hash 664028322, now seen corresponding path program 1 times [2021-11-20 05:55:56,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:56,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136292129] [2021-11-20 05:55:56,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:56,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 235 proven. 38 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-20 05:55:56,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:56,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136292129] [2021-11-20 05:55:56,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136292129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:55:56,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894963082] [2021-11-20 05:55:56,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:56,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:56,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:56,240 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:56,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:55:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:56,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 05:55:56,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:56,496 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:55:56,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:55:56,597 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:55:56,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:55:56,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-20 05:55:56,844 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:55:56,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:55:56,912 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:55:56,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:55:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 228 proven. 132 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-11-20 05:55:56,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:57,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-20 05:55:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-20 05:55:57,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894963082] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:55:57,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:55:57,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 9] total 10 [2021-11-20 05:55:57,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272562935] [2021-11-20 05:55:57,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:57,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:57,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:57,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:57,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:55:57,282 INFO L87 Difference]: Start difference. First operand 3387 states and 5082 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:59,288 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:55:59,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:59,834 INFO L93 Difference]: Finished difference Result 7270 states and 10826 transitions. [2021-11-20 05:55:59,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:59,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 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 243 [2021-11-20 05:55:59,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:59,838 INFO L225 Difference]: With dead ends: 7270 [2021-11-20 05:55:59,838 INFO L226 Difference]: Without dead ends: 3906 [2021-11-20 05:55:59,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:55:59,840 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 141 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:59,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 354 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:55:59,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3906 states. [2021-11-20 05:55:59,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3906 to 3387. [2021-11-20 05:55:59,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 3386 states have (on average 1.4864146485528646) internal successors, (5033), 3386 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:59,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 5033 transitions. [2021-11-20 05:55:59,961 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 5033 transitions. Word has length 243 [2021-11-20 05:55:59,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:59,961 INFO L470 AbstractCegarLoop]: Abstraction has 3387 states and 5033 transitions. [2021-11-20 05:55:59,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:59,961 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 5033 transitions. [2021-11-20 05:55:59,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-20 05:55:59,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:59,964 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:59,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:00,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-11-20 05:56:00,165 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:00,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:00,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1164047724, now seen corresponding path program 1 times [2021-11-20 05:56:00,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:00,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442338679] [2021-11-20 05:56:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:00,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 240 proven. 35 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-20 05:56:00,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:00,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442338679] [2021-11-20 05:56:00,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442338679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:00,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799895542] [2021-11-20 05:56:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:00,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:00,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:00,274 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:00,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:56:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:00,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 05:56:00,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:00,619 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:56:00,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:56:00,746 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:56:00,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:56:00,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-20 05:56:01,053 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:56:01,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:56:01,139 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:56:01,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:56:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 233 proven. 130 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-20 05:56:01,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:01,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-20 05:56:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 218 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-20 05:56:01,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799895542] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:01,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:56:01,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 9] total 10 [2021-11-20 05:56:01,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125248751] [2021-11-20 05:56:01,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:01,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:56:01,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:01,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:56:01,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:56:01,656 INFO L87 Difference]: Start difference. First operand 3387 states and 5033 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:03,667 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:56:04,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:04,157 INFO L93 Difference]: Finished difference Result 7200 states and 10644 transitions. [2021-11-20 05:56:04,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:56:04,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 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 244 [2021-11-20 05:56:04,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:04,161 INFO L225 Difference]: With dead ends: 7200 [2021-11-20 05:56:04,161 INFO L226 Difference]: Without dead ends: 3836 [2021-11-20 05:56:04,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:56:04,163 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 132 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:04,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 366 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 245 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:56:04,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3836 states. [2021-11-20 05:56:04,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3836 to 3282. [2021-11-20 05:56:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3282 states, 3281 states have (on average 1.4763791526973484) internal successors, (4844), 3281 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:04,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3282 states to 3282 states and 4844 transitions. [2021-11-20 05:56:04,293 INFO L78 Accepts]: Start accepts. Automaton has 3282 states and 4844 transitions. Word has length 244 [2021-11-20 05:56:04,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:04,293 INFO L470 AbstractCegarLoop]: Abstraction has 3282 states and 4844 transitions. [2021-11-20 05:56:04,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:04,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3282 states and 4844 transitions. [2021-11-20 05:56:04,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-20 05:56:04,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:04,296 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 7, 7, 7, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:04,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:04,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-11-20 05:56:04,497 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:04,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:04,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1622682042, now seen corresponding path program 1 times [2021-11-20 05:56:04,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:04,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509221849] [2021-11-20 05:56:04,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:04,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 05:56:04,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:04,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509221849] [2021-11-20 05:56:04,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509221849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:04,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:04,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:56:04,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152942807] [2021-11-20 05:56:04,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:04,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:56:04,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:04,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:56:04,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:56:04,583 INFO L87 Difference]: Start difference. First operand 3282 states and 4844 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:06,103 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:56:06,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:06,577 INFO L93 Difference]: Finished difference Result 7072 states and 10420 transitions. [2021-11-20 05:56:06,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:56:06,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 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 245 [2021-11-20 05:56:06,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:06,581 INFO L225 Difference]: With dead ends: 7072 [2021-11-20 05:56:06,581 INFO L226 Difference]: Without dead ends: 3813 [2021-11-20 05:56:06,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:06,583 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 72 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:06,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 627 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 05:56:06,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-11-20 05:56:06,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 3464. [2021-11-20 05:56:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3464 states, 3463 states have (on average 1.4776205602079122) internal successors, (5117), 3463 states have internal predecessors, (5117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:06,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3464 states to 3464 states and 5117 transitions. [2021-11-20 05:56:06,690 INFO L78 Accepts]: Start accepts. Automaton has 3464 states and 5117 transitions. Word has length 245 [2021-11-20 05:56:06,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:06,690 INFO L470 AbstractCegarLoop]: Abstraction has 3464 states and 5117 transitions. [2021-11-20 05:56:06,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:06,690 INFO L276 IsEmpty]: Start isEmpty. Operand 3464 states and 5117 transitions. [2021-11-20 05:56:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-20 05:56:06,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:06,694 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:06,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-11-20 05:56:06,694 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:06,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:06,695 INFO L85 PathProgramCache]: Analyzing trace with hash -57566657, now seen corresponding path program 1 times [2021-11-20 05:56:06,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:06,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296682102] [2021-11-20 05:56:06,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:06,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 05:56:06,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:06,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296682102] [2021-11-20 05:56:06,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296682102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:06,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:06,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:56:06,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267116683] [2021-11-20 05:56:06,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:06,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:56:06,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:06,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:56:06,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:56:06,786 INFO L87 Difference]: Start difference. First operand 3464 states and 5117 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:08,435 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:56:08,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:08,874 INFO L93 Difference]: Finished difference Result 7254 states and 10686 transitions. [2021-11-20 05:56:08,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:56:08,875 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 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 245 [2021-11-20 05:56:08,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:08,878 INFO L225 Difference]: With dead ends: 7254 [2021-11-20 05:56:08,878 INFO L226 Difference]: Without dead ends: 3813 [2021-11-20 05:56:08,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:08,879 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 67 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:08,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 625 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 05:56:08,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-11-20 05:56:08,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 3492. [2021-11-20 05:56:08,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 1.4757949011744487) internal successors, (5152), 3491 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:08,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 5152 transitions. [2021-11-20 05:56:08,988 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 5152 transitions. Word has length 245 [2021-11-20 05:56:08,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:08,989 INFO L470 AbstractCegarLoop]: Abstraction has 3492 states and 5152 transitions. [2021-11-20 05:56:08,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:08,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 5152 transitions. [2021-11-20 05:56:08,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-20 05:56:08,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:08,992 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 7, 7, 7, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:08,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-11-20 05:56:08,993 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:08,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:08,994 INFO L85 PathProgramCache]: Analyzing trace with hash 762890758, now seen corresponding path program 1 times [2021-11-20 05:56:08,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:08,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707112939] [2021-11-20 05:56:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:08,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 05:56:09,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:09,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707112939] [2021-11-20 05:56:09,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707112939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:09,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:09,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:56:09,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728970532] [2021-11-20 05:56:09,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:09,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:56:09,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:09,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:56:09,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:56:09,072 INFO L87 Difference]: Start difference. First operand 3492 states and 5152 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:10,988 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:56:11,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:11,413 INFO L93 Difference]: Finished difference Result 7268 states and 10693 transitions. [2021-11-20 05:56:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:56:11,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 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 246 [2021-11-20 05:56:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:11,417 INFO L225 Difference]: With dead ends: 7268 [2021-11-20 05:56:11,417 INFO L226 Difference]: Without dead ends: 3799 [2021-11-20 05:56:11,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:11,419 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 68 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:11,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 623 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 05:56:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3799 states. [2021-11-20 05:56:11,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3799 to 3492. [2021-11-20 05:56:11,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 1.4737897450587225) internal successors, (5145), 3491 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 5145 transitions. [2021-11-20 05:56:11,559 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 5145 transitions. Word has length 246 [2021-11-20 05:56:11,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:11,559 INFO L470 AbstractCegarLoop]: Abstraction has 3492 states and 5145 transitions. [2021-11-20 05:56:11,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:11,559 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 5145 transitions. [2021-11-20 05:56:11,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-20 05:56:11,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:11,563 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:11,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-11-20 05:56:11,563 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:11,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:11,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1504592843, now seen corresponding path program 1 times [2021-11-20 05:56:11,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:11,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948843867] [2021-11-20 05:56:11,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:11,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 05:56:11,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:11,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948843867] [2021-11-20 05:56:11,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948843867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:11,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:11,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:56:11,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500352665] [2021-11-20 05:56:11,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:11,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:56:11,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:11,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:56:11,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:56:11,631 INFO L87 Difference]: Start difference. First operand 3492 states and 5145 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:13,639 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:56:14,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:14,060 INFO L93 Difference]: Finished difference Result 7254 states and 10665 transitions. [2021-11-20 05:56:14,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:56:14,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 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 246 [2021-11-20 05:56:14,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:14,065 INFO L225 Difference]: With dead ends: 7254 [2021-11-20 05:56:14,066 INFO L226 Difference]: Without dead ends: 3785 [2021-11-20 05:56:14,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:14,068 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 62 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:14,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 619 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 224 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:56:14,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2021-11-20 05:56:14,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3499. [2021-11-20 05:56:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3499 states, 3498 states have (on average 1.47284162378502) internal successors, (5152), 3498 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:14,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3499 states to 3499 states and 5152 transitions. [2021-11-20 05:56:14,180 INFO L78 Accepts]: Start accepts. Automaton has 3499 states and 5152 transitions. Word has length 246 [2021-11-20 05:56:14,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:14,180 INFO L470 AbstractCegarLoop]: Abstraction has 3499 states and 5152 transitions. [2021-11-20 05:56:14,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 3499 states and 5152 transitions. [2021-11-20 05:56:14,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-20 05:56:14,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:14,184 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 7, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:14,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-11-20 05:56:14,184 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:14,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:14,185 INFO L85 PathProgramCache]: Analyzing trace with hash 40022671, now seen corresponding path program 1 times [2021-11-20 05:56:14,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:14,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926002372] [2021-11-20 05:56:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:14,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 05:56:14,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:14,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926002372] [2021-11-20 05:56:14,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926002372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:14,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:14,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:56:14,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313630777] [2021-11-20 05:56:14,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:14,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:56:14,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:14,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:56:14,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:56:14,292 INFO L87 Difference]: Start difference. First operand 3499 states and 5152 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:15,659 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:56:16,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:16,094 INFO L93 Difference]: Finished difference Result 7240 states and 10637 transitions. [2021-11-20 05:56:16,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:56:16,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 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 246 [2021-11-20 05:56:16,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:16,098 INFO L225 Difference]: With dead ends: 7240 [2021-11-20 05:56:16,098 INFO L226 Difference]: Without dead ends: 3764 [2021-11-20 05:56:16,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:16,100 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 59 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:16,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 615 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 05:56:16,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3764 states. [2021-11-20 05:56:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3764 to 3506. [2021-11-20 05:56:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 1.4718972895863052) internal successors, (5159), 3505 states have internal predecessors, (5159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 5159 transitions. [2021-11-20 05:56:16,214 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 5159 transitions. Word has length 246 [2021-11-20 05:56:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:16,215 INFO L470 AbstractCegarLoop]: Abstraction has 3506 states and 5159 transitions. [2021-11-20 05:56:16,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:16,215 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 5159 transitions. [2021-11-20 05:56:16,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-20 05:56:16,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:16,218 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:16,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-11-20 05:56:16,218 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:16,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:16,219 INFO L85 PathProgramCache]: Analyzing trace with hash -234238643, now seen corresponding path program 1 times [2021-11-20 05:56:16,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:16,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432472672] [2021-11-20 05:56:16,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:16,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 332 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-20 05:56:16,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:16,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432472672] [2021-11-20 05:56:16,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432472672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:16,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:16,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:56:16,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218090112] [2021-11-20 05:56:16,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:16,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:56:16,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:16,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:56:16,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:16,397 INFO L87 Difference]: Start difference. First operand 3506 states and 5159 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:18,407 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:56:20,432 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:56:21,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:21,058 INFO L93 Difference]: Finished difference Result 7444 states and 10959 transitions. [2021-11-20 05:56:21,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:56:21,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 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 247 [2021-11-20 05:56:21,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:21,062 INFO L225 Difference]: With dead ends: 7444 [2021-11-20 05:56:21,062 INFO L226 Difference]: Without dead ends: 3961 [2021-11-20 05:56:21,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:56:21,064 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 53 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:21,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 749 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 380 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2021-11-20 05:56:21,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3961 states. [2021-11-20 05:56:21,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3961 to 3737. [2021-11-20 05:56:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 1.4783190578158458) internal successors, (5523), 3736 states have internal predecessors, (5523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:21,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 5523 transitions. [2021-11-20 05:56:21,180 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 5523 transitions. Word has length 247 [2021-11-20 05:56:21,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:21,181 INFO L470 AbstractCegarLoop]: Abstraction has 3737 states and 5523 transitions. [2021-11-20 05:56:21,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:21,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 5523 transitions. [2021-11-20 05:56:21,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-20 05:56:21,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:21,184 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:21,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-11-20 05:56:21,184 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:21,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:21,185 INFO L85 PathProgramCache]: Analyzing trace with hash -983869199, now seen corresponding path program 1 times [2021-11-20 05:56:21,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:21,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951190969] [2021-11-20 05:56:21,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:21,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 372 proven. 68 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 05:56:21,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:21,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951190969] [2021-11-20 05:56:21,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951190969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:21,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667385237] [2021-11-20 05:56:21,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:21,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:21,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:21,431 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:21,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:56:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:21,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 05:56:21,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:21,721 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:56:21,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:56:21,826 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:56:21,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:56:21,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-20 05:56:22,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 05:56:22,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-11-20 05:56:22,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-11-20 05:56:22,066 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 05:56:22,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 32 [2021-11-20 05:56:22,189 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-20 05:56:22,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 54 [2021-11-20 05:56:22,647 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:56:22,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 14 [2021-11-20 05:56:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 362 proven. 71 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 05:56:22,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:23,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-11-20 05:56:23,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-11-20 05:56:25,150 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_65 Int) (v_arrayElimCell_66 Int)) (not (= (select (select (store |c_#memory_int| v_arrayElimCell_65 (store (select |c_#memory_int| v_arrayElimCell_65) (+ 844 v_arrayElimCell_66) 8640)) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|)) 8656))) is different from false [2021-11-20 05:56:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-20 05:56:25,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667385237] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:25,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:56:25,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 11] total 17 [2021-11-20 05:56:25,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017181892] [2021-11-20 05:56:25,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:25,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:56:25,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:25,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:56:25,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=202, Unknown=1, NotChecked=28, Total=272 [2021-11-20 05:56:25,325 INFO L87 Difference]: Start difference. First operand 3737 states and 5523 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:27,176 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:56:28,896 WARN L838 $PredicateComparison]: unable to prove that (and (not (= 8656 (select (select |c_#memory_int| |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|)))) (forall ((v_arrayElimCell_65 Int) (v_arrayElimCell_66 Int)) (not (= (select (select (store |c_#memory_int| v_arrayElimCell_65 (store (select |c_#memory_int| v_arrayElimCell_65) (+ 844 v_arrayElimCell_66) 8640)) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|)) 8656)))) is different from false [2021-11-20 05:56:29,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:29,288 INFO L93 Difference]: Finished difference Result 8186 states and 12090 transitions. [2021-11-20 05:56:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:56:29,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 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 251 [2021-11-20 05:56:29,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:29,292 INFO L225 Difference]: With dead ends: 8186 [2021-11-20 05:56:29,293 INFO L226 Difference]: Without dead ends: 4472 [2021-11-20 05:56:29,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 494 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=47, Invalid=231, Unknown=2, NotChecked=62, Total=342 [2021-11-20 05:56:29,295 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 105 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:29,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 589 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 251 Invalid, 0 Unknown, 232 Unchecked, 2.2s Time] [2021-11-20 05:56:29,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4472 states. [2021-11-20 05:56:29,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4472 to 4030. [2021-11-20 05:56:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4030 states, 4029 states have (on average 1.4882104740630429) internal successors, (5996), 4029 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:29,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4030 states to 4030 states and 5996 transitions. [2021-11-20 05:56:29,448 INFO L78 Accepts]: Start accepts. Automaton has 4030 states and 5996 transitions. Word has length 251 [2021-11-20 05:56:29,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:29,449 INFO L470 AbstractCegarLoop]: Abstraction has 4030 states and 5996 transitions. [2021-11-20 05:56:29,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:29,449 INFO L276 IsEmpty]: Start isEmpty. Operand 4030 states and 5996 transitions. [2021-11-20 05:56:29,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-20 05:56:29,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:29,452 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:29,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:29,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-11-20 05:56:29,653 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:29,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:29,653 INFO L85 PathProgramCache]: Analyzing trace with hash -36831313, now seen corresponding path program 1 times [2021-11-20 05:56:29,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:29,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100183150] [2021-11-20 05:56:29,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:29,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 379 proven. 54 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 05:56:29,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:29,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100183150] [2021-11-20 05:56:29,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100183150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:29,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084871968] [2021-11-20 05:56:29,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:29,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:29,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:29,855 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:29,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 05:56:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:30,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 05:56:30,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:30,184 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:56:30,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:56:30,322 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:56:30,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:56:30,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-20 05:56:30,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 05:56:30,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-11-20 05:56:30,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-11-20 05:56:30,584 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 05:56:30,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 32 [2021-11-20 05:56:30,687 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-20 05:56:30,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 54 [2021-11-20 05:56:31,137 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:56:31,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 14 [2021-11-20 05:56:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 362 proven. 71 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 05:56:31,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:31,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-11-20 05:56:31,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-11-20 05:56:32,752 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_78 Int) (v_arrayElimCell_77 Int)) (not (= 8656 (select (store (select (store |c_#memory_int| v_arrayElimCell_77 (store (select |c_#memory_int| v_arrayElimCell_77) (+ 844 v_arrayElimCell_78) 3)) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 64 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|) 0) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|))))) is different from false [2021-11-20 05:56:32,762 INFO L354 Elim1Store]: treesize reduction 55, result has 1.8 percent of original size [2021-11-20 05:56:32,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 1 [2021-11-20 05:56:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-20 05:56:32,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084871968] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:32,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:56:32,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 11] total 17 [2021-11-20 05:56:32,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503875286] [2021-11-20 05:56:32,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:32,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:56:32,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:32,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:56:32,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=200, Unknown=1, NotChecked=28, Total=272 [2021-11-20 05:56:32,934 INFO L87 Difference]: Start difference. First operand 4030 states and 5996 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:34,941 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:56:36,577 WARN L838 $PredicateComparison]: unable to prove that (and (not (= 8656 (select (store (select |c_#memory_int| |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 64 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|) 0) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|)))) (forall ((v_arrayElimCell_78 Int) (v_arrayElimCell_77 Int)) (not (= 8656 (select (store (select (store |c_#memory_int| v_arrayElimCell_77 (store (select |c_#memory_int| v_arrayElimCell_77) (+ 844 v_arrayElimCell_78) 3)) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 64 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|) 0) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|)))))) is different from false [2021-11-20 05:56:36,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:36,973 INFO L93 Difference]: Finished difference Result 8797 states and 13090 transitions. [2021-11-20 05:56:36,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:56:36,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 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 251 [2021-11-20 05:56:36,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:36,978 INFO L225 Difference]: With dead ends: 8797 [2021-11-20 05:56:36,978 INFO L226 Difference]: Without dead ends: 4790 [2021-11-20 05:56:36,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 492 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=50, Invalid=228, Unknown=2, NotChecked=62, Total=342 [2021-11-20 05:56:36,981 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 105 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:36,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 634 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 250 Invalid, 1 Unknown, 224 Unchecked, 2.4s Time] [2021-11-20 05:56:36,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4790 states. [2021-11-20 05:56:37,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4790 to 3856. [2021-11-20 05:56:37,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3856 states, 3855 states have (on average 1.4853437094682231) internal successors, (5726), 3855 states have internal predecessors, (5726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3856 states to 3856 states and 5726 transitions. [2021-11-20 05:56:37,130 INFO L78 Accepts]: Start accepts. Automaton has 3856 states and 5726 transitions. Word has length 251 [2021-11-20 05:56:37,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:37,131 INFO L470 AbstractCegarLoop]: Abstraction has 3856 states and 5726 transitions. [2021-11-20 05:56:37,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 3856 states and 5726 transitions. [2021-11-20 05:56:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-20 05:56:37,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:37,135 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:37,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:37,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-11-20 05:56:37,336 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:37,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1892298620, now seen corresponding path program 1 times [2021-11-20 05:56:37,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:37,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882676803] [2021-11-20 05:56:37,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:37,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 377 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-20 05:56:37,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:37,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882676803] [2021-11-20 05:56:37,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882676803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:37,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:37,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:56:37,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280062886] [2021-11-20 05:56:37,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:37,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:56:37,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:37,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:56:37,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:56:37,528 INFO L87 Difference]: Start difference. First operand 3856 states and 5726 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:39,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:56:41,560 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:56:43,587 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:56:44,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:44,822 INFO L93 Difference]: Finished difference Result 8751 states and 12937 transitions. [2021-11-20 05:56:44,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:56:44,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 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 252 [2021-11-20 05:56:44,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:44,828 INFO L225 Difference]: With dead ends: 8751 [2021-11-20 05:56:44,828 INFO L226 Difference]: Without dead ends: 4918 [2021-11-20 05:56:44,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:56:44,831 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 266 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:44,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 1059 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 751 Invalid, 3 Unknown, 0 Unchecked, 6.9s Time] [2021-11-20 05:56:44,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4918 states. [2021-11-20 05:56:45,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4918 to 4080. [2021-11-20 05:56:45,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4080 states, 4079 states have (on average 1.4878646727139004) internal successors, (6069), 4079 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:45,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4080 states to 4080 states and 6069 transitions. [2021-11-20 05:56:45,029 INFO L78 Accepts]: Start accepts. Automaton has 4080 states and 6069 transitions. Word has length 252 [2021-11-20 05:56:45,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:45,030 INFO L470 AbstractCegarLoop]: Abstraction has 4080 states and 6069 transitions. [2021-11-20 05:56:45,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:45,030 INFO L276 IsEmpty]: Start isEmpty. Operand 4080 states and 6069 transitions. [2021-11-20 05:56:45,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-20 05:56:45,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:45,034 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:45,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-11-20 05:56:45,034 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:45,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1185702014, now seen corresponding path program 1 times [2021-11-20 05:56:45,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:45,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052359733] [2021-11-20 05:56:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:45,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 380 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-20 05:56:45,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:45,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052359733] [2021-11-20 05:56:45,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052359733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:45,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:45,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:56:45,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028274443] [2021-11-20 05:56:45,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:45,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:56:45,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:45,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:56:45,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:56:45,276 INFO L87 Difference]: Start difference. First operand 4080 states and 6069 transitions. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:47,287 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:56:49,309 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:56:51,329 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:56:53,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:53,036 INFO L93 Difference]: Finished difference Result 10010 states and 14830 transitions. [2021-11-20 05:56:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:56:53,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 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 252 [2021-11-20 05:56:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:53,041 INFO L225 Difference]: With dead ends: 10010 [2021-11-20 05:56:53,041 INFO L226 Difference]: Without dead ends: 5953 [2021-11-20 05:56:53,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:56:53,044 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 445 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 48 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:53,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 1131 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 801 Invalid, 3 Unknown, 0 Unchecked, 7.2s Time] [2021-11-20 05:56:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5953 states. [2021-11-20 05:56:53,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5953 to 4342. [2021-11-20 05:56:53,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4342 states, 4341 states have (on average 1.4943561391384474) internal successors, (6487), 4341 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:53,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4342 states to 4342 states and 6487 transitions. [2021-11-20 05:56:53,214 INFO L78 Accepts]: Start accepts. Automaton has 4342 states and 6487 transitions. Word has length 252 [2021-11-20 05:56:53,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:53,214 INFO L470 AbstractCegarLoop]: Abstraction has 4342 states and 6487 transitions. [2021-11-20 05:56:53,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:53,215 INFO L276 IsEmpty]: Start isEmpty. Operand 4342 states and 6487 transitions. [2021-11-20 05:56:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-20 05:56:53,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:53,218 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:53,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-11-20 05:56:53,219 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:53,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:53,219 INFO L85 PathProgramCache]: Analyzing trace with hash -913268295, now seen corresponding path program 1 times [2021-11-20 05:56:53,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:53,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534151792] [2021-11-20 05:56:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:53,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-11-20 05:56:53,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:53,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534151792] [2021-11-20 05:56:53,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534151792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:53,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:53,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:56:53,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360282389] [2021-11-20 05:56:53,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:53,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:56:53,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:53,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:56:53,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:56:53,297 INFO L87 Difference]: Start difference. First operand 4342 states and 6487 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:55,306 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:56:55,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:55,721 INFO L93 Difference]: Finished difference Result 8753 states and 13082 transitions. [2021-11-20 05:56:55,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:56:55,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 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 255 [2021-11-20 05:56:55,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:55,725 INFO L225 Difference]: With dead ends: 8753 [2021-11-20 05:56:55,725 INFO L226 Difference]: Without dead ends: 4434 [2021-11-20 05:56:55,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:55,728 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 35 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:55,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 539 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 177 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 05:56:55,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4434 states. [2021-11-20 05:56:55,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4434 to 4342. [2021-11-20 05:56:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4342 states, 4341 states have (on average 1.4927436074637181) internal successors, (6480), 4341 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:55,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4342 states to 4342 states and 6480 transitions. [2021-11-20 05:56:55,879 INFO L78 Accepts]: Start accepts. Automaton has 4342 states and 6480 transitions. Word has length 255 [2021-11-20 05:56:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:55,879 INFO L470 AbstractCegarLoop]: Abstraction has 4342 states and 6480 transitions. [2021-11-20 05:56:55,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 4342 states and 6480 transitions. [2021-11-20 05:56:55,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-20 05:56:55,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:55,884 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 7, 7, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:55,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-11-20 05:56:55,884 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:55,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:55,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1810901222, now seen corresponding path program 1 times [2021-11-20 05:56:55,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:55,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976929252] [2021-11-20 05:56:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:55,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 390 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-11-20 05:56:55,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:55,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976929252] [2021-11-20 05:56:55,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976929252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:55,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:55,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:56:55,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103654130] [2021-11-20 05:56:55,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:55,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:56:55,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:55,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:56:55,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:56:55,961 INFO L87 Difference]: Start difference. First operand 4342 states and 6480 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:57,976 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:56:58,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:58,424 INFO L93 Difference]: Finished difference Result 8753 states and 13068 transitions. [2021-11-20 05:56:58,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:56:58,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 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 256 [2021-11-20 05:56:58,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:58,428 INFO L225 Difference]: With dead ends: 8753 [2021-11-20 05:56:58,428 INFO L226 Difference]: Without dead ends: 4434 [2021-11-20 05:56:58,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:58,430 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 33 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:58,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 537 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 177 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:56:58,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4434 states. [2021-11-20 05:56:58,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4434 to 4342. [2021-11-20 05:56:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4342 states, 4341 states have (on average 1.4911310757889886) internal successors, (6473), 4341 states have internal predecessors, (6473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:58,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4342 states to 4342 states and 6473 transitions. [2021-11-20 05:56:58,591 INFO L78 Accepts]: Start accepts. Automaton has 4342 states and 6473 transitions. Word has length 256 [2021-11-20 05:56:58,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:58,591 INFO L470 AbstractCegarLoop]: Abstraction has 4342 states and 6473 transitions. [2021-11-20 05:56:58,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:58,591 INFO L276 IsEmpty]: Start isEmpty. Operand 4342 states and 6473 transitions. [2021-11-20 05:56:58,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-20 05:56:58,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:58,596 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:58,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-11-20 05:56:58,596 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:56:58,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:58,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1272967988, now seen corresponding path program 1 times [2021-11-20 05:56:58,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:58,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652319034] [2021-11-20 05:56:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:58,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 397 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-11-20 05:56:58,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:58,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652319034] [2021-11-20 05:56:58,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652319034] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:58,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:58,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:56:58,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823026635] [2021-11-20 05:56:58,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:58,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:56:58,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:58,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:56:58,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:56:58,670 INFO L87 Difference]: Start difference. First operand 4342 states and 6473 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:00,678 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:57:01,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:57:01,090 INFO L93 Difference]: Finished difference Result 8731 states and 13031 transitions. [2021-11-20 05:57:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:57:01,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 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 257 [2021-11-20 05:57:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:57:01,093 INFO L225 Difference]: With dead ends: 8731 [2021-11-20 05:57:01,093 INFO L226 Difference]: Without dead ends: 4412 [2021-11-20 05:57:01,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:57:01,095 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 29 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:57:01,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 531 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 172 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 05:57:01,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4412 states. [2021-11-20 05:57:01,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4412 to 4342. [2021-11-20 05:57:01,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4342 states, 4341 states have (on average 1.4895185441142593) internal successors, (6466), 4341 states have internal predecessors, (6466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4342 states to 4342 states and 6466 transitions. [2021-11-20 05:57:01,250 INFO L78 Accepts]: Start accepts. Automaton has 4342 states and 6466 transitions. Word has length 257 [2021-11-20 05:57:01,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:57:01,250 INFO L470 AbstractCegarLoop]: Abstraction has 4342 states and 6466 transitions. [2021-11-20 05:57:01,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:01,250 INFO L276 IsEmpty]: Start isEmpty. Operand 4342 states and 6466 transitions. [2021-11-20 05:57:01,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-20 05:57:01,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:57:01,254 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:57:01,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-11-20 05:57:01,254 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:57:01,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:01,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1539926387, now seen corresponding path program 1 times [2021-11-20 05:57:01,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:01,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749026722] [2021-11-20 05:57:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:01,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 410 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-11-20 05:57:01,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:01,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749026722] [2021-11-20 05:57:01,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749026722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:57:01,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:57:01,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:57:01,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944544593] [2021-11-20 05:57:01,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:57:01,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:57:01,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:01,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:57:01,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:57:01,336 INFO L87 Difference]: Start difference. First operand 4342 states and 6466 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:02,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:57:02,672 INFO L93 Difference]: Finished difference Result 8836 states and 13139 transitions. [2021-11-20 05:57:02,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:57:02,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 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 263 [2021-11-20 05:57:02,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:57:02,676 INFO L225 Difference]: With dead ends: 8836 [2021-11-20 05:57:02,676 INFO L226 Difference]: Without dead ends: 4517 [2021-11-20 05:57:02,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:57:02,678 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 51 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:57:02,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 597 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 05:57:02,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2021-11-20 05:57:02,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 4342. [2021-11-20 05:57:02,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4342 states, 4341 states have (on average 1.48790601243953) internal successors, (6459), 4341 states have internal predecessors, (6459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4342 states to 4342 states and 6459 transitions. [2021-11-20 05:57:02,840 INFO L78 Accepts]: Start accepts. Automaton has 4342 states and 6459 transitions. Word has length 263 [2021-11-20 05:57:02,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:57:02,840 INFO L470 AbstractCegarLoop]: Abstraction has 4342 states and 6459 transitions. [2021-11-20 05:57:02,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:02,840 INFO L276 IsEmpty]: Start isEmpty. Operand 4342 states and 6459 transitions. [2021-11-20 05:57:02,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-20 05:57:02,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:57:02,844 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:57:02,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-11-20 05:57:02,845 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:57:02,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:02,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1328414785, now seen corresponding path program 1 times [2021-11-20 05:57:02,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:02,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306484816] [2021-11-20 05:57:02,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:02,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-11-20 05:57:02,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:02,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306484816] [2021-11-20 05:57:02,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306484816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:57:02,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:57:02,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:57:02,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403838462] [2021-11-20 05:57:02,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:57:02,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:57:02,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:02,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:57:02,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:57:02,930 INFO L87 Difference]: Start difference. First operand 4342 states and 6459 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:04,938 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:57:05,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:57:05,424 INFO L93 Difference]: Finished difference Result 8808 states and 13089 transitions. [2021-11-20 05:57:05,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:57:05,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 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 264 [2021-11-20 05:57:05,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:57:05,428 INFO L225 Difference]: With dead ends: 8808 [2021-11-20 05:57:05,428 INFO L226 Difference]: Without dead ends: 4489 [2021-11-20 05:57:05,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:57:05,430 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 45 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:57:05,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 589 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 191 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 05:57:05,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4489 states. [2021-11-20 05:57:05,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4489 to 4342. [2021-11-20 05:57:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4342 states, 4341 states have (on average 1.4862934807648007) internal successors, (6452), 4341 states have internal predecessors, (6452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4342 states to 4342 states and 6452 transitions. [2021-11-20 05:57:05,593 INFO L78 Accepts]: Start accepts. Automaton has 4342 states and 6452 transitions. Word has length 264 [2021-11-20 05:57:05,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:57:05,594 INFO L470 AbstractCegarLoop]: Abstraction has 4342 states and 6452 transitions. [2021-11-20 05:57:05,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 4342 states and 6452 transitions. [2021-11-20 05:57:05,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-20 05:57:05,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:57:05,598 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 6, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:57:05,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-11-20 05:57:05,598 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:57:05,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:05,598 INFO L85 PathProgramCache]: Analyzing trace with hash -308996714, now seen corresponding path program 1 times [2021-11-20 05:57:05,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:05,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152467898] [2021-11-20 05:57:05,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:05,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-20 05:57:05,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:05,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152467898] [2021-11-20 05:57:05,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152467898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:57:05,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:57:05,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:57:05,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796411581] [2021-11-20 05:57:05,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:57:05,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:57:05,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:05,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:57:05,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:57:05,779 INFO L87 Difference]: Start difference. First operand 4342 states and 6452 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:07,786 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:57:09,816 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:57:10,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:57:10,997 INFO L93 Difference]: Finished difference Result 9673 states and 14243 transitions. [2021-11-20 05:57:10,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:57:10,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 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 269 [2021-11-20 05:57:10,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:57:11,002 INFO L225 Difference]: With dead ends: 9673 [2021-11-20 05:57:11,002 INFO L226 Difference]: Without dead ends: 5354 [2021-11-20 05:57:11,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:57:11,005 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 292 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 30 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:57:11,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 883 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 502 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2021-11-20 05:57:11,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5354 states. [2021-11-20 05:57:11,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5354 to 4342. [2021-11-20 05:57:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4342 states, 4341 states have (on average 1.4830684174153421) internal successors, (6438), 4341 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:11,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4342 states to 4342 states and 6438 transitions. [2021-11-20 05:57:11,203 INFO L78 Accepts]: Start accepts. Automaton has 4342 states and 6438 transitions. Word has length 269 [2021-11-20 05:57:11,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:57:11,204 INFO L470 AbstractCegarLoop]: Abstraction has 4342 states and 6438 transitions. [2021-11-20 05:57:11,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:11,204 INFO L276 IsEmpty]: Start isEmpty. Operand 4342 states and 6438 transitions. [2021-11-20 05:57:11,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-20 05:57:11,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:57:11,208 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 6, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:57:11,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-11-20 05:57:11,208 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:57:11,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:11,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1741987284, now seen corresponding path program 1 times [2021-11-20 05:57:11,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:11,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822919266] [2021-11-20 05:57:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:11,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-20 05:57:11,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:11,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822919266] [2021-11-20 05:57:11,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822919266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:57:11,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:57:11,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:57:11,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898500783] [2021-11-20 05:57:11,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:57:11,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:57:11,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:11,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:57:11,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:57:11,409 INFO L87 Difference]: Start difference. First operand 4342 states and 6438 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:13,309 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:57:15,329 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:57:16,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:57:16,543 INFO L93 Difference]: Finished difference Result 9628 states and 14151 transitions. [2021-11-20 05:57:16,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:57:16,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 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 269 [2021-11-20 05:57:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:57:16,548 INFO L225 Difference]: With dead ends: 9628 [2021-11-20 05:57:16,548 INFO L226 Difference]: Without dead ends: 5309 [2021-11-20 05:57:16,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:57:16,550 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 264 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:57:16,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 908 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 535 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2021-11-20 05:57:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5309 states. [2021-11-20 05:57:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5309 to 4342. [2021-11-20 05:57:16,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4342 states, 4341 states have (on average 1.4816862474084311) internal successors, (6432), 4341 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:16,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4342 states to 4342 states and 6432 transitions. [2021-11-20 05:57:16,728 INFO L78 Accepts]: Start accepts. Automaton has 4342 states and 6432 transitions. Word has length 269 [2021-11-20 05:57:16,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:57:16,728 INFO L470 AbstractCegarLoop]: Abstraction has 4342 states and 6432 transitions. [2021-11-20 05:57:16,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:16,728 INFO L276 IsEmpty]: Start isEmpty. Operand 4342 states and 6432 transitions. [2021-11-20 05:57:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-20 05:57:16,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:57:16,733 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 8, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:57:16,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-11-20 05:57:16,733 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:57:16,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:16,734 INFO L85 PathProgramCache]: Analyzing trace with hash 830941036, now seen corresponding path program 1 times [2021-11-20 05:57:16,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:16,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145388966] [2021-11-20 05:57:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:16,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 327 proven. 0 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2021-11-20 05:57:16,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:16,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145388966] [2021-11-20 05:57:16,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145388966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:57:16,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:57:16,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:57:16,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651062247] [2021-11-20 05:57:16,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:57:16,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:57:16,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:16,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:57:16,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:57:16,812 INFO L87 Difference]: Start difference. First operand 4342 states and 6432 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:18,508 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:57:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:57:19,004 INFO L93 Difference]: Finished difference Result 8902 states and 13146 transitions. [2021-11-20 05:57:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:57:19,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 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 272 [2021-11-20 05:57:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:57:19,008 INFO L225 Difference]: With dead ends: 8902 [2021-11-20 05:57:19,009 INFO L226 Difference]: Without dead ends: 4583 [2021-11-20 05:57:19,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:57:19,011 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 53 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:57:19,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 609 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 05:57:19,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4583 states. [2021-11-20 05:57:19,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4583 to 4360. [2021-11-20 05:57:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4360 states, 4359 states have (on average 1.482220692819454) internal successors, (6461), 4359 states have internal predecessors, (6461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4360 states to 4360 states and 6461 transitions. [2021-11-20 05:57:19,182 INFO L78 Accepts]: Start accepts. Automaton has 4360 states and 6461 transitions. Word has length 272 [2021-11-20 05:57:19,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:57:19,182 INFO L470 AbstractCegarLoop]: Abstraction has 4360 states and 6461 transitions. [2021-11-20 05:57:19,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand 4360 states and 6461 transitions. [2021-11-20 05:57:19,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-20 05:57:19,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:57:19,186 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:57:19,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-11-20 05:57:19,186 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:57:19,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:19,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1765384698, now seen corresponding path program 1 times [2021-11-20 05:57:19,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:19,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509411588] [2021-11-20 05:57:19,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:19,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 426 proven. 34 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-20 05:57:19,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:19,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509411588] [2021-11-20 05:57:19,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509411588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:57:19,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803450035] [2021-11-20 05:57:19,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:19,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:57:19,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:57:19,365 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:57:19,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 05:57:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:19,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:57:19,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:57:19,650 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:57:19,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:57:19,752 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:57:19,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:57:19,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 05:57:19,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-11-20 05:57:19,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-11-20 05:57:19,938 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 05:57:19,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 32 [2021-11-20 05:57:20,011 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-20 05:57:20,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 54 [2021-11-20 05:57:20,233 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:57:20,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 14 [2021-11-20 05:57:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 420 proven. 51 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-20 05:57:20,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:57:20,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-11-20 05:57:20,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-11-20 05:57:22,032 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_89 Int) (v_arrayElimCell_88 Int)) (not (= 8496 (select (select (store |c_#memory_int| v_arrayElimCell_88 (store (select |c_#memory_int| v_arrayElimCell_88) (+ 844 v_arrayElimCell_89) 8640)) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|))))) is different from false [2021-11-20 05:57:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 426 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-20 05:57:22,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803450035] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:57:22,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:57:22,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 8] total 14 [2021-11-20 05:57:22,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121791618] [2021-11-20 05:57:22,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:57:22,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:57:22,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:22,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:57:22,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=124, Unknown=1, NotChecked=22, Total=182 [2021-11-20 05:57:22,215 INFO L87 Difference]: Start difference. First operand 4360 states and 6461 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:23,896 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:57:26,158 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimCell_89 Int) (v_arrayElimCell_88 Int)) (not (= 8496 (select (select (store |c_#memory_int| v_arrayElimCell_88 (store (select |c_#memory_int| v_arrayElimCell_88) (+ 844 v_arrayElimCell_89) 8640)) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|))))) (not (= 8496 (select (select |c_#memory_int| |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|))))) is different from false [2021-11-20 05:57:26,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:57:26,751 INFO L93 Difference]: Finished difference Result 9188 states and 13560 transitions. [2021-11-20 05:57:26,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:57:26,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2021-11-20 05:57:26,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:57:26,755 INFO L225 Difference]: With dead ends: 9188 [2021-11-20 05:57:26,755 INFO L226 Difference]: Without dead ends: 4851 [2021-11-20 05:57:26,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 541 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=41, Invalid=147, Unknown=2, NotChecked=50, Total=240 [2021-11-20 05:57:26,757 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 124 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:57:26,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 453 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 244 Invalid, 0 Unknown, 203 Unchecked, 2.1s Time] [2021-11-20 05:57:26,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4851 states. [2021-11-20 05:57:26,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4851 to 4360. [2021-11-20 05:57:26,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4360 states, 4359 states have (on average 1.46662078458362) internal successors, (6393), 4359 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:26,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4360 states to 4360 states and 6393 transitions. [2021-11-20 05:57:26,946 INFO L78 Accepts]: Start accepts. Automaton has 4360 states and 6393 transitions. Word has length 273 [2021-11-20 05:57:26,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:57:26,946 INFO L470 AbstractCegarLoop]: Abstraction has 4360 states and 6393 transitions. [2021-11-20 05:57:26,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 4360 states and 6393 transitions. [2021-11-20 05:57:26,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-20 05:57:26,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:57:26,951 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:57:26,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 05:57:27,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-11-20 05:57:27,152 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:57:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:27,152 INFO L85 PathProgramCache]: Analyzing trace with hash 442205752, now seen corresponding path program 1 times [2021-11-20 05:57:27,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:27,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240537694] [2021-11-20 05:57:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:27,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:27,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 426 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-20 05:57:27,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:27,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240537694] [2021-11-20 05:57:27,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240537694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:57:27,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:57:27,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:57:27,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203698023] [2021-11-20 05:57:27,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:57:27,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:57:27,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:27,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:57:27,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:57:27,388 INFO L87 Difference]: Start difference. First operand 4360 states and 6393 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:29,401 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:57:31,426 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:57:33,451 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:57:35,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:57:35,040 INFO L93 Difference]: Finished difference Result 11793 states and 17247 transitions. [2021-11-20 05:57:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:57:35,041 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2021-11-20 05:57:35,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:57:35,048 INFO L225 Difference]: With dead ends: 11793 [2021-11-20 05:57:35,048 INFO L226 Difference]: Without dead ends: 7456 [2021-11-20 05:57:35,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:57:35,052 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 411 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 93 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:57:35,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 1214 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 829 Invalid, 3 Unknown, 0 Unchecked, 7.2s Time] [2021-11-20 05:57:35,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2021-11-20 05:57:35,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 7032. [2021-11-20 05:57:35,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7032 states, 7031 states have (on average 1.4726212487555113) internal successors, (10354), 7031 states have internal predecessors, (10354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:35,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7032 states to 7032 states and 10354 transitions. [2021-11-20 05:57:35,397 INFO L78 Accepts]: Start accepts. Automaton has 7032 states and 10354 transitions. Word has length 273 [2021-11-20 05:57:35,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:57:35,397 INFO L470 AbstractCegarLoop]: Abstraction has 7032 states and 10354 transitions. [2021-11-20 05:57:35,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:35,397 INFO L276 IsEmpty]: Start isEmpty. Operand 7032 states and 10354 transitions. [2021-11-20 05:57:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-20 05:57:35,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:57:35,402 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:57:35,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-11-20 05:57:35,402 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:57:35,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:35,403 INFO L85 PathProgramCache]: Analyzing trace with hash 362531680, now seen corresponding path program 1 times [2021-11-20 05:57:35,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:35,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491344856] [2021-11-20 05:57:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:35,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 431 proven. 32 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-20 05:57:35,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:35,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491344856] [2021-11-20 05:57:35,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491344856] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:57:35,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758699576] [2021-11-20 05:57:35,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:35,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:57:35,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:57:35,585 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:57:35,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 05:57:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:35,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:57:35,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:57:35,849 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:57:35,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:57:35,971 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:57:35,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 05:57:36,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 05:57:36,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-11-20 05:57:36,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-11-20 05:57:36,157 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 05:57:36,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 32 [2021-11-20 05:57:36,238 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-20 05:57:36,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 54 [2021-11-20 05:57:36,463 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:57:36,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 14 [2021-11-20 05:57:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 425 proven. 51 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-20 05:57:36,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:57:37,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-11-20 05:57:37,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-11-20 05:57:39,019 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_100 Int) (v_arrayElimCell_99 Int)) (not (= 8497 (select (select (store |c_#memory_int| v_arrayElimCell_99 (store (select |c_#memory_int| v_arrayElimCell_99) (+ v_arrayElimCell_100 844) 8640)) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|))))) is different from false [2021-11-20 05:57:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 431 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-20 05:57:39,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758699576] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:57:39,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:57:39,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 8] total 14 [2021-11-20 05:57:39,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469764448] [2021-11-20 05:57:39,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:57:39,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:57:39,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:39,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:57:39,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=123, Unknown=1, NotChecked=22, Total=182 [2021-11-20 05:57:39,169 INFO L87 Difference]: Start difference. First operand 7032 states and 10354 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:41,175 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:57:42,696 WARN L838 $PredicateComparison]: unable to prove that (and (not (= 8497 (select (select |c_#memory_int| |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|)))) (forall ((v_arrayElimCell_100 Int) (v_arrayElimCell_99 Int)) (not (= 8497 (select (select (store |c_#memory_int| v_arrayElimCell_99 (store (select |c_#memory_int| v_arrayElimCell_99) (+ v_arrayElimCell_100 844) 8640)) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|)))))) is different from false [2021-11-20 05:57:43,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:57:43,298 INFO L93 Difference]: Finished difference Result 14868 states and 21811 transitions. [2021-11-20 05:57:43,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:57:43,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 274 [2021-11-20 05:57:43,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:57:43,306 INFO L225 Difference]: With dead ends: 14868 [2021-11-20 05:57:43,306 INFO L226 Difference]: Without dead ends: 7859 [2021-11-20 05:57:43,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 543 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=42, Invalid=146, Unknown=2, NotChecked=50, Total=240 [2021-11-20 05:57:43,309 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 123 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:57:43,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 392 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 242 Invalid, 1 Unknown, 194 Unchecked, 2.3s Time] [2021-11-20 05:57:43,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7859 states. [2021-11-20 05:57:43,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7859 to 7032. [2021-11-20 05:57:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7032 states, 7031 states have (on average 1.4569762480443749) internal successors, (10244), 7031 states have internal predecessors, (10244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7032 states to 7032 states and 10244 transitions. [2021-11-20 05:57:43,666 INFO L78 Accepts]: Start accepts. Automaton has 7032 states and 10244 transitions. Word has length 274 [2021-11-20 05:57:43,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:57:43,666 INFO L470 AbstractCegarLoop]: Abstraction has 7032 states and 10244 transitions. [2021-11-20 05:57:43,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:43,666 INFO L276 IsEmpty]: Start isEmpty. Operand 7032 states and 10244 transitions. [2021-11-20 05:57:43,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-20 05:57:43,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:57:43,671 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:57:43,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 05:57:43,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-11-20 05:57:43,872 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:57:43,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:43,872 INFO L85 PathProgramCache]: Analyzing trace with hash -2001309982, now seen corresponding path program 1 times [2021-11-20 05:57:43,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:43,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438380080] [2021-11-20 05:57:43,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:43,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 431 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-20 05:57:44,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:44,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438380080] [2021-11-20 05:57:44,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438380080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:57:44,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:57:44,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:57:44,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454670585] [2021-11-20 05:57:44,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:57:44,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:57:44,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:44,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:57:44,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:57:44,044 INFO L87 Difference]: Start difference. First operand 7032 states and 10244 transitions. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:45,627 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:57:47,649 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:57:49,673 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:57:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:57:51,281 INFO L93 Difference]: Finished difference Result 17133 states and 24896 transitions. [2021-11-20 05:57:51,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:57:51,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 274 [2021-11-20 05:57:51,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:57:51,289 INFO L225 Difference]: With dead ends: 17133 [2021-11-20 05:57:51,289 INFO L226 Difference]: Without dead ends: 10124 [2021-11-20 05:57:51,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:57:51,294 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 409 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 93 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:57:51,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 1217 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 825 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2021-11-20 05:57:51,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10124 states. [2021-11-20 05:57:51,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10124 to 7032. [2021-11-20 05:57:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7032 states, 7031 states have (on average 1.4569762480443749) internal successors, (10244), 7031 states have internal predecessors, (10244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:51,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7032 states to 7032 states and 10244 transitions. [2021-11-20 05:57:51,662 INFO L78 Accepts]: Start accepts. Automaton has 7032 states and 10244 transitions. Word has length 274 [2021-11-20 05:57:51,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:57:51,663 INFO L470 AbstractCegarLoop]: Abstraction has 7032 states and 10244 transitions. [2021-11-20 05:57:51,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:51,663 INFO L276 IsEmpty]: Start isEmpty. Operand 7032 states and 10244 transitions. [2021-11-20 05:57:51,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-20 05:57:51,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:57:51,669 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:57:51,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-11-20 05:57:51,669 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:57:51,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:51,669 INFO L85 PathProgramCache]: Analyzing trace with hash 758340726, now seen corresponding path program 1 times [2021-11-20 05:57:51,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:51,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256396708] [2021-11-20 05:57:51,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:51,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2021-11-20 05:57:51,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:51,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256396708] [2021-11-20 05:57:51,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256396708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:57:51,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:57:51,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:57:51,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752796738] [2021-11-20 05:57:51,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:57:51,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:57:51,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:57:51,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:57:51,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:57:51,945 INFO L87 Difference]: Start difference. First operand 7032 states and 10244 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:53,066 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:57:55,082 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:57:55,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:57:55,770 INFO L93 Difference]: Finished difference Result 14061 states and 20484 transitions. [2021-11-20 05:57:55,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:57:55,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 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 280 [2021-11-20 05:57:55,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:57:55,776 INFO L225 Difference]: With dead ends: 14061 [2021-11-20 05:57:55,777 INFO L226 Difference]: Without dead ends: 7032 [2021-11-20 05:57:55,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:57:55,780 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:57:55,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 671 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2021-11-20 05:57:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7032 states. [2021-11-20 05:57:56,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7032 to 7032. [2021-11-20 05:57:56,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7032 states, 7031 states have (on average 1.4568340207651829) internal successors, (10243), 7031 states have internal predecessors, (10243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:56,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7032 states to 7032 states and 10243 transitions. [2021-11-20 05:57:56,123 INFO L78 Accepts]: Start accepts. Automaton has 7032 states and 10243 transitions. Word has length 280 [2021-11-20 05:57:56,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:57:56,123 INFO L470 AbstractCegarLoop]: Abstraction has 7032 states and 10243 transitions. [2021-11-20 05:57:56,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:57:56,123 INFO L276 IsEmpty]: Start isEmpty. Operand 7032 states and 10243 transitions. [2021-11-20 05:57:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-20 05:57:56,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:57:56,128 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:57:56,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-11-20 05:57:56,128 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:57:56,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:57:56,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1340403276, now seen corresponding path program 1 times [2021-11-20 05:57:56,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:57:56,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369038098] [2021-11-20 05:57:56,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:56,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:57:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 28 proven. 555 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-20 05:57:57,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:57:57,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369038098] [2021-11-20 05:57:57,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369038098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:57:57,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895879625] [2021-11-20 05:57:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:57:57,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:57:57,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:57:57,105 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:57:57,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 05:57:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:57:57,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-20 05:57:57,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:58:11,847 WARN L227 SmtUtils]: Spent 14.14s on a formula simplification. DAG size of input: 66 DAG size of output: 15 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 05:58:11,848 INFO L354 Elim1Store]: treesize reduction 212, result has 9.0 percent of original size [2021-11-20 05:58:11,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 2051 treesize of output 2050 [2021-11-20 05:58:11,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:11,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:11,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:11,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:11,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:11,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:11,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:11,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:11,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:11,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:11,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 2038 treesize of output 2035 [2021-11-20 05:58:11,915 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-20 05:58:11,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:58:11,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-20 05:58:11,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091525983] [2021-11-20 05:58:11,916 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 05:58:11,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:58:11,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:58:11,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:58:11,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:58:11,917 INFO L87 Difference]: Start difference. First operand 7032 states and 10243 transitions. Second operand has 11 states, 11 states have (on average 18.545454545454547) internal successors, (204), 11 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:11,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:58:11,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:58:11,919 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:58:11,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:58:11,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 05:58:12,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:58:12,145 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@29f996a1 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 05:58:12,148 INFO L158 Benchmark]: Toolchain (without parser) took 354629.35ms. Allocated memory was 96.5MB in the beginning and 559.9MB in the end (delta: 463.5MB). Free memory was 60.4MB in the beginning and 285.0MB in the end (delta: -224.5MB). Peak memory consumption was 239.3MB. Max. memory is 16.1GB. [2021-11-20 05:58:12,149 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 96.5MB. Free memory is still 48.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:58:12,149 INFO L158 Benchmark]: CACSL2BoogieTranslator took 774.17ms. Allocated memory was 96.5MB in the beginning and 119.5MB in the end (delta: 23.1MB). Free memory was 60.4MB in the beginning and 73.9MB in the end (delta: -13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-20 05:58:12,149 INFO L158 Benchmark]: Boogie Procedure Inliner took 117.10ms. Allocated memory is still 119.5MB. Free memory was 73.9MB in the beginning and 69.2MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 05:58:12,149 INFO L158 Benchmark]: Boogie Preprocessor took 140.65ms. Allocated memory is still 119.5MB. Free memory was 69.2MB in the beginning and 62.3MB in the end (delta: 6.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 05:58:12,149 INFO L158 Benchmark]: RCFGBuilder took 2062.27ms. Allocated memory is still 119.5MB. Free memory was 62.3MB in the beginning and 80.1MB in the end (delta: -17.8MB). Peak memory consumption was 40.0MB. Max. memory is 16.1GB. [2021-11-20 05:58:12,149 INFO L158 Benchmark]: TraceAbstraction took 351527.33ms. Allocated memory was 119.5MB in the beginning and 559.9MB in the end (delta: 440.4MB). Free memory was 80.1MB in the beginning and 285.0MB in the end (delta: -204.9MB). Peak memory consumption was 235.2MB. Max. memory is 16.1GB. [2021-11-20 05:58:12,150 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 96.5MB. Free memory is still 48.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 774.17ms. Allocated memory was 96.5MB in the beginning and 119.5MB in the end (delta: 23.1MB). Free memory was 60.4MB in the beginning and 73.9MB in the end (delta: -13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 117.10ms. Allocated memory is still 119.5MB. Free memory was 73.9MB in the beginning and 69.2MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 140.65ms. Allocated memory is still 119.5MB. Free memory was 69.2MB in the beginning and 62.3MB in the end (delta: 6.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 2062.27ms. Allocated memory is still 119.5MB. Free memory was 62.3MB in the beginning and 80.1MB in the end (delta: -17.8MB). Peak memory consumption was 40.0MB. Max. memory is 16.1GB. * TraceAbstraction took 351527.33ms. Allocated memory was 119.5MB in the beginning and 559.9MB in the end (delta: 440.4MB). Free memory was 80.1MB in the beginning and 285.0MB in the end (delta: -204.9MB). Peak memory consumption was 235.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@29f996a1 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@29f996a1: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-20 05:58:12,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:58:14,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:58:14,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:58:14,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:58:14,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:58:14,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:58:14,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:58:14,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:58:14,695 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:58:14,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:58:14,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:58:14,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:58:14,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:58:14,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:58:14,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:58:14,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:58:14,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:58:14,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:58:14,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:58:14,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:58:14,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:58:14,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:58:14,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:58:14,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:58:14,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:58:14,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:58:14,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:58:14,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:58:14,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:58:14,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:58:14,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:58:14,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:58:14,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:58:14,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:58:14,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:58:14,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:58:14,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:58:14,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:58:14,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:58:14,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:58:14,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:58:14,737 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-20 05:58:14,775 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:58:14,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:58:14,776 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:58:14,776 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:58:14,779 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:58:14,779 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:58:14,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:58:14,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:58:14,782 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:58:14,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:58:14,783 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:58:14,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:58:14,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:58:14,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:58:14,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:58:14,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:58:14,785 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 05:58:14,785 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 05:58:14,786 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 05:58:14,786 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:58:14,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:58:14,786 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:58:14,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:58:14,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:58:14,788 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:58:14,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:58:14,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:58:14,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:58:14,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:58:14,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:58:14,790 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 05:58:14,790 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 05:58:14,791 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:58:14,791 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:58:14,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:58:14,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:58:14,792 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 05:58:14,793 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc [2021-11-20 05:58:15,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:58:15,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:58:15,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:58:15,288 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:58:15,289 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:58:15,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-20 05:58:15,356 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/data/d5841f2ab/776eb7ba31344240bea5f5e3ce87bc33/FLAG4d6fd625a [2021-11-20 05:58:16,204 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:58:16,206 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-20 05:58:16,234 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/data/d5841f2ab/776eb7ba31344240bea5f5e3ce87bc33/FLAG4d6fd625a [2021-11-20 05:58:16,313 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/data/d5841f2ab/776eb7ba31344240bea5f5e3ce87bc33 [2021-11-20 05:58:16,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:58:16,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:58:16,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:58:16,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:58:16,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:58:16,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:58:16" (1/1) ... [2021-11-20 05:58:16,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e8e2db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:58:16, skipping insertion in model container [2021-11-20 05:58:16,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:58:16" (1/1) ... [2021-11-20 05:58:16,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:58:16,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:58:16,948 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_6368563e-f997-4489-a1da-4127a4fd582c/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-20 05:58:16,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:58:16,990 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-20 05:58:17,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:58:17,135 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_6368563e-f997-4489-a1da-4127a4fd582c/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-20 05:58:17,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:58:17,164 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:58:17,351 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_6368563e-f997-4489-a1da-4127a4fd582c/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-20 05:58:17,367 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:58:17,394 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:58:17,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:58:17 WrapperNode [2021-11-20 05:58:17,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:58:17,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:58:17,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:58:17,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:58:17,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:58:17" (1/1) ... [2021-11-20 05:58:17,447 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:58:17" (1/1) ... [2021-11-20 05:58:17,532 INFO L137 Inliner]: procedures = 35, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 762 [2021-11-20 05:58:17,533 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:58:17,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:58:17,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:58:17,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:58:17,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:58:17" (1/1) ... [2021-11-20 05:58:17,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:58:17" (1/1) ... [2021-11-20 05:58:17,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:58:17" (1/1) ... [2021-11-20 05:58:17,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:58:17" (1/1) ... [2021-11-20 05:58:17,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:58:17" (1/1) ... [2021-11-20 05:58:17,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:58:17" (1/1) ... [2021-11-20 05:58:17,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:58:17" (1/1) ... [2021-11-20 05:58:17,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:58:17,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:58:17,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:58:17,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:58:17,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:58:17" (1/1) ... [2021-11-20 05:58:17,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:58:17,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:58:17,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:58:17,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:58:17,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:58:17,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 05:58:17,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 05:58:17,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 05:58:17,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 05:58:17,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:58:17,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:58:17,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:58:17,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 05:58:18,019 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:58:18,021 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:58:18,039 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 05:58:27,706 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-20 05:58:27,706 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-20 05:58:27,706 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:58:27,715 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:58:27,715 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 05:58:27,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:58:27 BoogieIcfgContainer [2021-11-20 05:58:27,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:58:27,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:58:27,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:58:27,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:58:27,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:58:16" (1/3) ... [2021-11-20 05:58:27,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59298501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:58:27, skipping insertion in model container [2021-11-20 05:58:27,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:58:17" (2/3) ... [2021-11-20 05:58:27,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59298501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:58:27, skipping insertion in model container [2021-11-20 05:58:27,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:58:27" (3/3) ... [2021-11-20 05:58:27,726 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.07.i.cil-1.c [2021-11-20 05:58:27,731 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:58:27,732 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:58:27,791 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:58:27,807 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 05:58:27,807 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:58:27,836 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:27,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 05:58:27,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:58:27,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:58:27,852 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:58:27,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:58:27,859 INFO L85 PathProgramCache]: Analyzing trace with hash -442385418, now seen corresponding path program 1 times [2021-11-20 05:58:27,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:58:27,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463264639] [2021-11-20 05:58:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:58:27,878 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:58:27,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:58:27,885 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:58:27,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 05:58:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:58:28,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:58:28,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:58:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:58:28,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:58:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:58:28,731 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:58:28,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463264639] [2021-11-20 05:58:28,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463264639] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:58:28,732 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:58:28,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 05:58:28,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071730569] [2021-11-20 05:58:28,735 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:58:28,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:58:28,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:58:28,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:58:28,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:58:28,772 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:28,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:58:28,987 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-11-20 05:58:28,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:58:28,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-20 05:58:28,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:58:29,007 INFO L225 Difference]: With dead ends: 566 [2021-11-20 05:58:29,008 INFO L226 Difference]: Without dead ends: 387 [2021-11-20 05:58:29,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:58:29,016 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 402 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:58:29,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 670 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:58:29,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-20 05:58:29,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-11-20 05:58:29,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5286458333333333) internal successors, (587), 384 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-11-20 05:58:29,106 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-11-20 05:58:29,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:58:29,107 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-11-20 05:58:29,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:29,107 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-11-20 05:58:29,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 05:58:29,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:58:29,112 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:58:29,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:58:29,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:58:29,325 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:58:29,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:58:29,326 INFO L85 PathProgramCache]: Analyzing trace with hash 746604405, now seen corresponding path program 1 times [2021-11-20 05:58:29,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:58:29,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141906910] [2021-11-20 05:58:29,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:58:29,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:58:29,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:58:29,329 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:58:29,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 05:58:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:58:29,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:58:29,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:58:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:58:29,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:58:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:58:30,201 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:58:30,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141906910] [2021-11-20 05:58:30,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141906910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:58:30,204 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:58:30,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 05:58:30,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225630903] [2021-11-20 05:58:30,208 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:58:30,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:58:30,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:58:30,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:58:30,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:58:30,216 INFO L87 Difference]: Start difference. First operand 385 states and 587 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:30,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:58:30,895 INFO L93 Difference]: Finished difference Result 882 states and 1357 transitions. [2021-11-20 05:58:30,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:58:30,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-20 05:58:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:58:30,903 INFO L225 Difference]: With dead ends: 882 [2021-11-20 05:58:30,903 INFO L226 Difference]: Without dead ends: 631 [2021-11-20 05:58:30,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:58:30,909 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 305 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:58:30,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 722 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:58:30,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-20 05:58:30,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2021-11-20 05:58:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.5222929936305734) internal successors, (956), 628 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:30,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 956 transitions. [2021-11-20 05:58:30,987 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 956 transitions. Word has length 60 [2021-11-20 05:58:30,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:58:30,988 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 956 transitions. [2021-11-20 05:58:30,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:30,988 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 956 transitions. [2021-11-20 05:58:30,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 05:58:31,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:58:31,000 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:58:31,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:58:31,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:58:31,219 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:58:31,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:58:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1749353389, now seen corresponding path program 1 times [2021-11-20 05:58:31,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:58:31,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386840569] [2021-11-20 05:58:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:58:31,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:58:31,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:58:31,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:58:31,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 05:58:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:58:31,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:58:31,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:58:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:58:31,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:58:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:58:32,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:58:32,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386840569] [2021-11-20 05:58:32,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386840569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:58:32,360 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:58:32,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 05:58:32,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745542099] [2021-11-20 05:58:32,361 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:58:32,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:58:32,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:58:32,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:58:32,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:58:32,362 INFO L87 Difference]: Start difference. First operand 629 states and 956 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:33,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:58:33,425 INFO L93 Difference]: Finished difference Result 1244 states and 1900 transitions. [2021-11-20 05:58:33,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:58:33,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-20 05:58:33,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:58:33,432 INFO L225 Difference]: With dead ends: 1244 [2021-11-20 05:58:33,432 INFO L226 Difference]: Without dead ends: 749 [2021-11-20 05:58:33,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:58:33,437 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 137 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:58:33,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 569 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 05:58:33,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-11-20 05:58:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2021-11-20 05:58:33,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.518716577540107) internal successors, (1136), 748 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1136 transitions. [2021-11-20 05:58:33,470 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1136 transitions. Word has length 119 [2021-11-20 05:58:33,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:58:33,471 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 1136 transitions. [2021-11-20 05:58:33,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:33,471 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1136 transitions. [2021-11-20 05:58:33,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-20 05:58:33,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:58:33,475 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:58:33,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:58:33,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:58:33,690 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:58:33,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:58:33,691 INFO L85 PathProgramCache]: Analyzing trace with hash 433077792, now seen corresponding path program 1 times [2021-11-20 05:58:33,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:58:33,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823342650] [2021-11-20 05:58:33,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:58:33,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:58:33,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:58:33,696 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:58:33,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 05:58:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:58:34,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:58:34,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:58:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:58:34,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:58:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:58:34,912 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:58:34,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823342650] [2021-11-20 05:58:34,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823342650] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:58:34,912 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:58:34,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 05:58:34,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454318270] [2021-11-20 05:58:34,913 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:58:34,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:58:34,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:58:34,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:58:34,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:58:34,915 INFO L87 Difference]: Start difference. First operand 749 states and 1136 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:36,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:58:36,061 INFO L93 Difference]: Finished difference Result 1611 states and 2457 transitions. [2021-11-20 05:58:36,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:58:36,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-20 05:58:36,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:58:36,068 INFO L225 Difference]: With dead ends: 1611 [2021-11-20 05:58:36,068 INFO L226 Difference]: Without dead ends: 996 [2021-11-20 05:58:36,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:58:36,071 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 296 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:58:36,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 731 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 05:58:36,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-11-20 05:58:36,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 996. [2021-11-20 05:58:36,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.5155778894472363) internal successors, (1508), 995 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1508 transitions. [2021-11-20 05:58:36,114 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1508 transitions. Word has length 143 [2021-11-20 05:58:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:58:36,115 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 1508 transitions. [2021-11-20 05:58:36,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:36,116 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1508 transitions. [2021-11-20 05:58:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-20 05:58:36,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:58:36,120 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:58:36,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:58:36,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:58:36,336 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:58:36,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:58:36,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1349783187, now seen corresponding path program 1 times [2021-11-20 05:58:36,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:58:36,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009948750] [2021-11-20 05:58:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:58:36,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:58:36,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:58:36,342 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:58:36,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 05:58:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:58:36,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:58:36,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:58:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:58:37,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:58:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:58:37,527 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:58:37,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009948750] [2021-11-20 05:58:37,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009948750] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:58:37,527 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:58:37,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 05:58:37,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757804986] [2021-11-20 05:58:37,528 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:58:37,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:58:37,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:58:37,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:58:37,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:58:37,530 INFO L87 Difference]: Start difference. First operand 996 states and 1508 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:38,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:58:38,266 INFO L93 Difference]: Finished difference Result 2102 states and 3195 transitions. [2021-11-20 05:58:38,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:58:38,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 165 [2021-11-20 05:58:38,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:58:38,276 INFO L225 Difference]: With dead ends: 2102 [2021-11-20 05:58:38,277 INFO L226 Difference]: Without dead ends: 1240 [2021-11-20 05:58:38,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:58:38,280 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 295 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:58:38,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 728 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 05:58:38,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-11-20 05:58:38,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1240. [2021-11-20 05:58:38,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 1.5125100887812752) internal successors, (1874), 1239 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1874 transitions. [2021-11-20 05:58:38,336 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1874 transitions. Word has length 165 [2021-11-20 05:58:38,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:58:38,336 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1874 transitions. [2021-11-20 05:58:38,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:38,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1874 transitions. [2021-11-20 05:58:38,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-20 05:58:38,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:58:38,342 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:58:38,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:58:38,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:58:38,560 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:58:38,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:58:38,560 INFO L85 PathProgramCache]: Analyzing trace with hash -381805375, now seen corresponding path program 1 times [2021-11-20 05:58:38,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:58:38,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244332764] [2021-11-20 05:58:38,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:58:38,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:58:38,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:58:38,562 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:58:38,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 05:58:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:58:39,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 05:58:39,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:58:39,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 05:58:39,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 05:58:39,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-20 05:58:40,178 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-20 05:58:40,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 1289 treesize of output 1241 [2021-11-20 05:58:40,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-20 05:58:40,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 49 [2021-11-20 05:58:40,626 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-20 05:58:40,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-20 05:58:40,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:58:40,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-20 05:58:40,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-20 05:58:40,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-20 05:58:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:58:41,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:58:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 05:58:42,548 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:58:42,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244332764] [2021-11-20 05:58:42,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244332764] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:58:42,548 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:58:42,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-20 05:58:42,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824473192] [2021-11-20 05:58:42,549 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:58:42,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:58:42,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:58:42,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:58:42,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:58:42,551 INFO L87 Difference]: Start difference. First operand 1240 states and 1874 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:58:44,580 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:58:46,595 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:58:48,604 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:58:54,005 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:59:00,872 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:59:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:59:02,641 INFO L93 Difference]: Finished difference Result 2477 states and 3744 transitions. [2021-11-20 05:59:02,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:59:02,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 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 172 [2021-11-20 05:59:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:59:02,651 INFO L225 Difference]: With dead ends: 2477 [2021-11-20 05:59:02,651 INFO L226 Difference]: Without dead ends: 1240 [2021-11-20 05:59:02,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 335 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:59:02,654 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:59:02,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 931 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 266 Invalid, 3 Unknown, 60 Unchecked, 19.9s Time] [2021-11-20 05:59:02,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-11-20 05:59:02,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1240. [2021-11-20 05:59:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 1.5117029862792575) internal successors, (1873), 1239 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:02,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1873 transitions. [2021-11-20 05:59:02,703 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1873 transitions. Word has length 172 [2021-11-20 05:59:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:59:02,704 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1873 transitions. [2021-11-20 05:59:02,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:02,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1873 transitions. [2021-11-20 05:59:02,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-20 05:59:02,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:59:02,709 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:59:02,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:59:02,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:59:02,934 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:59:02,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:59:02,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1884903681, now seen corresponding path program 1 times [2021-11-20 05:59:02,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:59:02,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632864908] [2021-11-20 05:59:02,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:59:02,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:59:02,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:59:02,937 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:59:02,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 05:59:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:59:03,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:59:03,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:59:04,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:04,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:04,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:04,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:04,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:59:04,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:59:04,151 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-20 05:59:04,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-20 05:59:04,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:59:04,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:59:04,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:59:04,708 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-20 05:59:04,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-20 05:59:06,257 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 05:59:06,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-20 05:59:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-20 05:59:06,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:59:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-20 05:59:07,227 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:59:07,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632864908] [2021-11-20 05:59:07,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632864908] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:59:07,227 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:59:07,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-20 05:59:07,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915322989] [2021-11-20 05:59:07,228 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:59:07,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:59:07,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:59:07,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:59:07,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:59:07,231 INFO L87 Difference]: Start difference. First operand 1240 states and 1873 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:59:09,262 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:59:11,271 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:59:13,280 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:59:18,145 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:59:20,576 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:59:24,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:59:28,003 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:59:30,419 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:59:32,432 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:59:37,031 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:59:41,975 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:59:55,059 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 05:59:57,066 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:00:02,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:00:02,404 INFO L93 Difference]: Finished difference Result 4654 states and 7069 transitions. [2021-11-20 06:00:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:00:02,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 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 172 [2021-11-20 06:00:02,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:00:02,426 INFO L225 Difference]: With dead ends: 4654 [2021-11-20 06:00:02,427 INFO L226 Difference]: Without dead ends: 3424 [2021-11-20 06:00:02,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:00:02,430 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 259 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 74 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:00:02,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 891 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 851 Invalid, 4 Unknown, 0 Unchecked, 54.9s Time] [2021-11-20 06:00:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3424 states. [2021-11-20 06:00:02,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3424 to 1489. [2021-11-20 06:00:02,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 1.5470430107526882) internal successors, (2302), 1488 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:02,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 2302 transitions. [2021-11-20 06:00:02,570 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 2302 transitions. Word has length 172 [2021-11-20 06:00:02,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:00:02,571 INFO L470 AbstractCegarLoop]: Abstraction has 1489 states and 2302 transitions. [2021-11-20 06:00:02,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:02,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 2302 transitions. [2021-11-20 06:00:02,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-20 06:00:02,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:00:02,576 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:00:02,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-20 06:00:02,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:00:02,796 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:00:02,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:02,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1462011649, now seen corresponding path program 1 times [2021-11-20 06:00:02,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:00:02,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687126981] [2021-11-20 06:00:02,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:02,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:00:02,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:00:02,800 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:00:02,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 06:00:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:03,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:00:03,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:00:03,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:03,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:03,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:03,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:03,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:03,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:03,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:03,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:03,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:03,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:03,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:03,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:03,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:03,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:00:03,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:00:03,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:00:03,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:00:03,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:00:04,166 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-20 06:00:04,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-20 06:00:05,610 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:00:05,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-20 06:00:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 06:00:05,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:00:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 06:00:06,235 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:00:06,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687126981] [2021-11-20 06:00:06,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687126981] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:00:06,235 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:00:06,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-20 06:00:06,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028022903] [2021-11-20 06:00:06,236 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:00:06,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:00:06,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:00:06,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:00:06,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:00:06,237 INFO L87 Difference]: Start difference. First operand 1489 states and 2302 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:08,255 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:00:15,214 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:00:16,689 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:00:17,788 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:00:24,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:00:24,529 INFO L93 Difference]: Finished difference Result 3604 states and 5571 transitions. [2021-11-20 06:00:24,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:00:24,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 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 172 [2021-11-20 06:00:24,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:00:24,549 INFO L225 Difference]: With dead ends: 3604 [2021-11-20 06:00:24,550 INFO L226 Difference]: Without dead ends: 2125 [2021-11-20 06:00:24,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:00:24,554 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 110 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:00:24,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 615 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 1 Unknown, 0 Unchecked, 18.1s Time] [2021-11-20 06:00:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2021-11-20 06:00:24,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 1769. [2021-11-20 06:00:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1768 states have (on average 1.579185520361991) internal successors, (2792), 1768 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:24,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2792 transitions. [2021-11-20 06:00:24,689 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2792 transitions. Word has length 172 [2021-11-20 06:00:24,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:00:24,689 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 2792 transitions. [2021-11-20 06:00:24,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:24,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2792 transitions. [2021-11-20 06:00:24,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-20 06:00:24,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:00:24,696 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:00:24,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:00:24,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:00:24,909 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:00:24,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:24,910 INFO L85 PathProgramCache]: Analyzing trace with hash 991422329, now seen corresponding path program 1 times [2021-11-20 06:00:24,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:00:24,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068162161] [2021-11-20 06:00:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:24,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:00:24,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:00:24,914 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:00:24,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 06:00:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:26,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:00:26,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:00:26,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:26,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:26,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:26,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:26,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:26,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:26,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:26,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:26,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:26,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:26,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:26,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:26,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:00:26,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:00:26,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:00:26,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:00:26,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:00:26,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:00:26,909 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-20 06:00:26,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-20 06:00:27,685 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:00:27,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-20 06:00:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 06:00:27,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:00:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 06:00:28,371 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:00:28,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068162161] [2021-11-20 06:00:28,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068162161] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:00:28,371 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:00:28,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:00:28,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921166402] [2021-11-20 06:00:28,372 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:00:28,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:00:28,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:00:28,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:00:28,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:00:28,373 INFO L87 Difference]: Start difference. First operand 1769 states and 2792 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:00:30,395 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:00:32,409 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:00:36,255 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:00:37,855 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:00:43,059 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:00:44,309 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:00:53,613 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:01:01,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:01,562 INFO L93 Difference]: Finished difference Result 5243 states and 8185 transitions. [2021-11-20 06:01:01,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:01:01,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 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 185 [2021-11-20 06:01:01,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:01,587 INFO L225 Difference]: With dead ends: 5243 [2021-11-20 06:01:01,587 INFO L226 Difference]: Without dead ends: 3484 [2021-11-20 06:01:01,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:01:01,591 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 210 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:01,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 564 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 482 Invalid, 2 Unknown, 0 Unchecked, 32.9s Time] [2021-11-20 06:01:01,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3484 states. [2021-11-20 06:01:01,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3484 to 2073. [2021-11-20 06:01:01,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 2072 states have (on average 1.5810810810810811) internal successors, (3276), 2072 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:01,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 3276 transitions. [2021-11-20 06:01:01,752 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 3276 transitions. Word has length 185 [2021-11-20 06:01:01,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:01,753 INFO L470 AbstractCegarLoop]: Abstraction has 2073 states and 3276 transitions. [2021-11-20 06:01:01,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:01,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 3276 transitions. [2021-11-20 06:01:01,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-20 06:01:01,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:01,758 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:01,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:01,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:01:01,981 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:01,982 INFO L85 PathProgramCache]: Analyzing trace with hash -503738714, now seen corresponding path program 1 times [2021-11-20 06:01:01,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:01:01,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272387383] [2021-11-20 06:01:01,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:01,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:01:01,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:01:01,984 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:01:01,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 06:01:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:03,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:01:03,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:03,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:03,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:03,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:03,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:03,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:03,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:03,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:03,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:03,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:03,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:03,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:03,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:03,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:03,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:03,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:03,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:03,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:03,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:03,661 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-20 06:01:03,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-20 06:01:04,079 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:01:04,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-20 06:01:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 06:01:04,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:01:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 06:01:04,836 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:01:04,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272387383] [2021-11-20 06:01:04,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272387383] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:04,836 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:04,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:01:04,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940750508] [2021-11-20 06:01:04,836 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:04,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:01:04,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:01:04,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:01:04,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:01:04,838 INFO L87 Difference]: Start difference. First operand 2073 states and 3276 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:06,859 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:01:08,868 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:01:13,803 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:01:19,504 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:01:22,156 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:01:26,019 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:01:38,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:38,942 INFO L93 Difference]: Finished difference Result 5687 states and 8880 transitions. [2021-11-20 06:01:38,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:01:38,947 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2021-11-20 06:01:38,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:38,967 INFO L225 Difference]: With dead ends: 5687 [2021-11-20 06:01:38,967 INFO L226 Difference]: Without dead ends: 3624 [2021-11-20 06:01:38,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:01:38,971 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 219 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 67 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:38,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 687 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 609 Invalid, 3 Unknown, 0 Unchecked, 33.8s Time] [2021-11-20 06:01:38,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3624 states. [2021-11-20 06:01:39,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3624 to 2183. [2021-11-20 06:01:39,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2182 states have (on average 1.5614115490375802) internal successors, (3407), 2182 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 3407 transitions. [2021-11-20 06:01:39,150 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 3407 transitions. Word has length 186 [2021-11-20 06:01:39,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:39,150 INFO L470 AbstractCegarLoop]: Abstraction has 2183 states and 3407 transitions. [2021-11-20 06:01:39,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:39,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 3407 transitions. [2021-11-20 06:01:39,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-20 06:01:39,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:39,157 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:39,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:39,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:01:39,381 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:39,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:39,381 INFO L85 PathProgramCache]: Analyzing trace with hash 790677906, now seen corresponding path program 1 times [2021-11-20 06:01:39,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:01:39,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929950633] [2021-11-20 06:01:39,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:39,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:01:39,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:01:39,384 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:01:39,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 06:01:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:40,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:01:40,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:41,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:41,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:41,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:41,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:41,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:41,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:41,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:41,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:41,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:41,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:41,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:41,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:41,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:41,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:41,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:41,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:41,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:41,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:41,437 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-20 06:01:41,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-20 06:01:41,950 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:01:41,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-20 06:01:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 06:01:42,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:01:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 06:01:42,661 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:01:42,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929950633] [2021-11-20 06:01:42,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929950633] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:42,662 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:42,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:01:42,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808596274] [2021-11-20 06:01:42,662 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:42,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:01:42,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:01:42,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:01:42,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:01:42,663 INFO L87 Difference]: Start difference. First operand 2183 states and 3407 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:44,687 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:01:46,700 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:01:51,255 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:02:00,021 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:02:04,284 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:02:20,330 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:02:21,813 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:02:23,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:02:23,513 INFO L93 Difference]: Finished difference Result 5893 states and 9102 transitions. [2021-11-20 06:02:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:02:23,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 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 186 [2021-11-20 06:02:23,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:02:23,530 INFO L225 Difference]: With dead ends: 5893 [2021-11-20 06:02:23,531 INFO L226 Difference]: Without dead ends: 3720 [2021-11-20 06:02:23,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:02:23,534 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 216 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 66 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:02:23,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 774 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 625 Invalid, 2 Unknown, 0 Unchecked, 40.6s Time] [2021-11-20 06:02:23,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2021-11-20 06:02:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 2291. [2021-11-20 06:02:23,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.5414847161572052) internal successors, (3530), 2290 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:23,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3530 transitions. [2021-11-20 06:02:23,714 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3530 transitions. Word has length 186 [2021-11-20 06:02:23,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:02:23,715 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 3530 transitions. [2021-11-20 06:02:23,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3530 transitions. [2021-11-20 06:02:23,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-20 06:02:23,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:02:23,724 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:23,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:02:23,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:02:23,949 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:02:23,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:23,950 INFO L85 PathProgramCache]: Analyzing trace with hash 2111383387, now seen corresponding path program 1 times [2021-11-20 06:02:23,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:02:23,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901387228] [2021-11-20 06:02:23,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:23,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:02:23,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:02:23,952 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:02:23,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 06:02:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:24,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:02:24,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:02:24,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:24,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:24,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:24,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:24,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:24,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:24,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:24,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:24,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:24,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:24,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:24,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:24,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:02:24,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:02:24,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:02:24,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:02:24,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:02:24,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:02:25,255 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-20 06:02:25,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-20 06:02:26,132 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:02:26,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-20 06:02:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 06:02:26,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:02:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 06:02:26,795 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:02:26,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901387228] [2021-11-20 06:02:26,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901387228] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:02:26,795 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:02:26,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:02:26,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259962619] [2021-11-20 06:02:26,795 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:02:26,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:02:26,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:02:26,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:02:26,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:02:26,797 INFO L87 Difference]: Start difference. First operand 2291 states and 3530 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:02:28,816 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:02:30,831 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:02:35,114 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:02:37,562 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:02:46,109 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:02:49,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:02:54,708 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:02:56,303 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:03:08,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:08,452 INFO L93 Difference]: Finished difference Result 6113 states and 9358 transitions. [2021-11-20 06:03:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:03:08,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 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 186 [2021-11-20 06:03:08,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:08,478 INFO L225 Difference]: With dead ends: 6113 [2021-11-20 06:03:08,479 INFO L226 Difference]: Without dead ends: 3832 [2021-11-20 06:03:08,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:03:08,483 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 203 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 67 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:08,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 685 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 609 Invalid, 3 Unknown, 0 Unchecked, 41.4s Time] [2021-11-20 06:03:08,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3832 states. [2021-11-20 06:03:08,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3832 to 2489. [2021-11-20 06:03:08,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 2488 states have (on average 1.5341639871382637) internal successors, (3817), 2488 states have internal predecessors, (3817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:08,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 3817 transitions. [2021-11-20 06:03:08,681 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 3817 transitions. Word has length 186 [2021-11-20 06:03:08,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:08,682 INFO L470 AbstractCegarLoop]: Abstraction has 2489 states and 3817 transitions. [2021-11-20 06:03:08,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:08,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 3817 transitions. [2021-11-20 06:03:08,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-20 06:03:08,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:08,689 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:08,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-20 06:03:08,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:03:08,905 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:08,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:08,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1645926757, now seen corresponding path program 1 times [2021-11-20 06:03:08,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:03:08,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542305204] [2021-11-20 06:03:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:08,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:03:08,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:03:08,909 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:03:08,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 06:03:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:10,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:03:10,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:10,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:10,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:10,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:10,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:10,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:10,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:10,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:10,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:10,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:10,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:10,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:10,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:10,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:10,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:03:10,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:03:10,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:03:10,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:03:10,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:03:10,528 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-20 06:03:10,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-20 06:03:11,273 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:03:11,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-20 06:03:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 06:03:11,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:03:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 06:03:11,950 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:03:11,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542305204] [2021-11-20 06:03:11,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542305204] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:11,951 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:11,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:03:11,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860771204] [2021-11-20 06:03:11,951 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:11,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:03:11,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:03:11,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:03:11,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:03:11,952 INFO L87 Difference]: Start difference. First operand 2489 states and 3817 transitions. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:13,971 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:03:23,376 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:03:24,689 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:03:26,295 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:03:27,947 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:03:29,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:03:34,258 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:03:35,542 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:03:37,688 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:03:41,362 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:03:50,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:50,108 INFO L93 Difference]: Finished difference Result 6241 states and 9496 transitions. [2021-11-20 06:03:50,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:03:50,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 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 186 [2021-11-20 06:03:50,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:50,122 INFO L225 Difference]: With dead ends: 6241 [2021-11-20 06:03:50,122 INFO L226 Difference]: Without dead ends: 3762 [2021-11-20 06:03:50,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:03:50,126 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 204 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 69 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:50,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 670 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 604 Invalid, 1 Unknown, 0 Unchecked, 37.9s Time] [2021-11-20 06:03:50,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2021-11-20 06:03:50,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 2489. [2021-11-20 06:03:50,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 2488 states have (on average 1.5184887459807075) internal successors, (3778), 2488 states have internal predecessors, (3778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:50,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 3778 transitions. [2021-11-20 06:03:50,404 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 3778 transitions. Word has length 186 [2021-11-20 06:03:50,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:50,405 INFO L470 AbstractCegarLoop]: Abstraction has 2489 states and 3778 transitions. [2021-11-20 06:03:50,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 3778 transitions. [2021-11-20 06:03:50,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-20 06:03:50,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:50,413 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:50,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-20 06:03:50,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:03:50,637 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:50,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:50,637 INFO L85 PathProgramCache]: Analyzing trace with hash -855064592, now seen corresponding path program 1 times [2021-11-20 06:03:50,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:03:50,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969623536] [2021-11-20 06:03:50,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:50,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:03:50,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:03:50,640 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:03:50,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 06:03:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:51,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:03:51,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:51,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:51,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:51,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:51,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:51,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:51,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:51,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:51,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:51,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:51,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:51,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:51,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:51,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:03:51,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:03:51,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:03:51,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:03:51,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:03:51,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:03:52,379 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-20 06:03:52,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-20 06:03:52,913 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:03:52,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-20 06:03:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 06:03:53,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:03:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 06:03:53,552 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:03:53,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969623536] [2021-11-20 06:03:53,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969623536] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:53,552 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:53,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:03:53,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932119159] [2021-11-20 06:03:53,553 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:53,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:03:53,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:03:53,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:03:53,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:03:53,554 INFO L87 Difference]: Start difference. First operand 2489 states and 3778 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:55,578 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:03:57,584 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:04:00,653 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:04:03,241 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:04:07,563 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:04:12,373 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:04:13,698 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:04:24,613 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:04:25,902 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:04:27,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:04:27,054 INFO L93 Difference]: Finished difference Result 6361 states and 9618 transitions. [2021-11-20 06:04:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:04:27,055 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 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 187 [2021-11-20 06:04:27,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:04:27,063 INFO L225 Difference]: With dead ends: 6361 [2021-11-20 06:04:27,063 INFO L226 Difference]: Without dead ends: 3882 [2021-11-20 06:04:27,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:04:27,065 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 208 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 62 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:04:27,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 589 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 467 Invalid, 3 Unknown, 0 Unchecked, 33.2s Time] [2021-11-20 06:04:27,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2021-11-20 06:04:27,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 2509. [2021-11-20 06:04:27,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 2508 states have (on average 1.4988038277511961) internal successors, (3759), 2508 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:27,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3759 transitions. [2021-11-20 06:04:27,221 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3759 transitions. Word has length 187 [2021-11-20 06:04:27,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:04:27,222 INFO L470 AbstractCegarLoop]: Abstraction has 2509 states and 3759 transitions. [2021-11-20 06:04:27,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:27,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3759 transitions. [2021-11-20 06:04:27,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-20 06:04:27,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:04:27,228 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:27,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:04:27,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:04:27,441 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:04:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:27,441 INFO L85 PathProgramCache]: Analyzing trace with hash -711546899, now seen corresponding path program 1 times [2021-11-20 06:04:27,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:04:27,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509047711] [2021-11-20 06:04:27,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:27,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:04:27,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:04:27,444 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:04:27,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 06:04:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:29,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:04:29,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:04:29,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:04:29,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:04:29,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:04:29,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:04:29,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:04:29,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:04:29,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:04:29,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:04:29,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:04:29,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:04:29,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:04:29,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:04:29,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:04:29,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:04:29,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:04:29,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:04:29,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:04:29,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:04:29,693 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-20 06:04:29,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-20 06:04:30,407 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:04:30,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-20 06:04:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 06:04:30,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:04:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 06:04:31,175 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:04:31,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509047711] [2021-11-20 06:04:31,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509047711] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:04:31,175 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:04:31,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:04:31,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369796891] [2021-11-20 06:04:31,176 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:04:31,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:04:31,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:04:31,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:04:31,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:04:31,177 INFO L87 Difference]: Start difference. First operand 2509 states and 3759 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:33,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:04:34,695 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:04:41,796 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:04:46,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:04:57,759 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:04:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:04:59,459 INFO L93 Difference]: Finished difference Result 6381 states and 9550 transitions. [2021-11-20 06:04:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:04:59,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 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 188 [2021-11-20 06:04:59,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:04:59,469 INFO L225 Difference]: With dead ends: 6381 [2021-11-20 06:04:59,470 INFO L226 Difference]: Without dead ends: 3882 [2021-11-20 06:04:59,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:04:59,473 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 204 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 62 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:04:59,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 557 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 452 Invalid, 2 Unknown, 0 Unchecked, 28.0s Time] [2021-11-20 06:04:59,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2021-11-20 06:04:59,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 2519. [2021-11-20 06:04:59,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2518 states have (on average 1.4813343923749007) internal successors, (3730), 2518 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 3730 transitions. [2021-11-20 06:04:59,633 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 3730 transitions. Word has length 188 [2021-11-20 06:04:59,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:04:59,634 INFO L470 AbstractCegarLoop]: Abstraction has 2519 states and 3730 transitions. [2021-11-20 06:04:59,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:59,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 3730 transitions. [2021-11-20 06:04:59,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-20 06:04:59,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:04:59,642 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:59,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6368563e-f997-4489-a1da-4127a4fd582c/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0